Marcel Vos

Universidad de Valencia

H-index: 201

Europe-Spain

About Marcel Vos

Marcel Vos, With an exceptional h-index of 201 and a recent h-index of 145 (since 2020), a distinguished researcher at Universidad de Valencia, specializes in the field of particle physics.

His recent articles reflect a diverse array of research interests and contributions to the field:

Searches for exclusive Higgs boson decays into and boson decays into and in collisions at TeV with the ATLAS detector

Search for a new gauge boson via the process in collisions at TeV with the ATLAS detector

A statistical combination of ATLAS Run 2 searches for charginos and neutralinos at the LHC

Constraints on dark matter models involving an -channel mediator with the ATLAS detector in collisions at TeV

Observation of electroweak production of in association with jets in proton-proton collisions at TeV with the ATLAS Detector

Search for pair production of higgsinos in events with two Higgs bosons and missing transverse momentum in TeV collisions at the ATLAS experiment

Observation of Wγγ triboson production in proton-proton collisions at s= 13 TeV with the ATLAS detector

The performance of missing transverse momentum reconstruction and its significance with the ATLAS detector using 140 fb of TeV collisions

Marcel Vos Information

University	Universidad de Valencia
Position	IFIC Valencia (/CSIC)
Citations(all)	234668
Citations(since 2020)	107257
Cited By	173755
hIndex(all)	201
hIndex(since 2020)	145
i10Index(all)	866
i10Index(since 2020)	732
Email	Access Email
University Profile Page	Universidad de Valencia

Marcel Vos Skills & Research Interests

particle physics

Top articles of Marcel Vos

Searches for exclusive Higgs boson decays into and boson decays into and in collisions at TeV with the ATLAS detector

Authors

ATLAS Collaboration

Authors

Georges Aad,B Abbott,Kira Abeling,Nils Julius Abicht,SH Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,AC Abusleme Hoffman,Bobby Samir Acharya,C Adam Bourdarios,Leszek Adamczyk,Lukas Adamek,SV Addepalli,MJ Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,AA Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,M Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,TPA Åkesson,AV Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Martin Aleksa,IN Aleksandrov,Calin Alexa,Theodoros Alexopoulos,Alice Alfonsi,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,HMJ Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,BMM Allbrooke,Julia Frances Allen,CA Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,M Alvarez Estevez,A Alvarez Fernandez,MG Alviggi,Mohamed Aly,Y Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,CG Ames,Dante Amidei,SP Amor Dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,T Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,AV Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,DJA Antrim,Fabio Anulli,Masato Aoki,Takumi Aoki,JA Aparisi Pozo,MA Aparo,L Aperio Bella,Christian Appelt,Aram Apyan,N Aranzabal,Chiara Arcangeletti,ATH Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,J-H Arling,Aaron James Armbruster,Olivier Arnaez,Hannah Arnold,ZP Arrubarrena Tame,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Jihad Assahsah,K Assamagan,Robert Astalos,S Atashi,Ryan Justin Atkin,M Atkinson,Naim Bora Atlay,Hicham Atmani,PA Atmasiddha,Kamil Augsten,Silvia Auricchio,AD Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,F Backman,Anthony Badea,Paolo Bagnaia,Marzieh Bahmani,AJ Bailey,VR Bailey,JT Baines,Luke Baines,Christos Bakalis,OK Baker,Evelin Bakos

Journal

Physics Letters B

Published Date

2024/1/1

This letter reports the observation of W (ℓ ν) γ γ production in proton-proton collisions. This measurement uses the full Run 2 sample of events recorded at a center-of-mass energy of s= 13 TeV by the ATLAS detector at the LHC, corresponding to an integrated luminosity of 140 fb− 1. Events with a leptonically-decaying W boson and at least two photons are considered. The background-only hypothesis is rejected with an observed and expected significance of 5.6 standard deviations. The inclusive fiducial production cross section of W (e ν) γ γ and W (μ ν) γ γ events is measured to be σ fid= 13.8±1.1 (stat)+ 2.1− 2.0 (syst)±0.1 (lumi) fb, in agreement with the Standard Model prediction.

The performance of missing transverse momentum reconstruction and its significance with the ATLAS detector using 140 fb of TeV collisions

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,Adam Bailey,Virginia Bailey,John Baines,Luke Baines,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta

Published Date

2024/2/13

This paper presents the reconstruction of missing transverse momentum () in proton-proton collisions, at a center-of-mass energy of 13 TeV. This is a challenging task involving many detector inputs, combining fully calibrated electrons, muons, photons, hadronically decaying -leptons, hadronic jets, and soft activity from remaining tracks. Possible double counting of momentum is avoided by applying a signal ambiguity resolution procedure which rejects detector inputs that have already been used. Several `working points' are defined with varying stringency of selections, the tightest improving the resolution at high pile-up by up to 30% compared to the loosest. The performance is evaluated using data and Monte Carlo simulation, with an emphasis on understanding the impact of pile-up, primarily using events consistent with leptonic decays. The studies use of data, collected by the ATLAS experiment at the Large Hadron Collider between 2015 and 2018. The results demonstrate that reconstruction, and its associated significance, are well understood and reliably modelled by simulation. Finally, the systematic uncertainties on the soft component are calculated. After various improvements the scale and resolution uncertainties are reduced by up to 76% and 51%, respectively, compared to the previous calculation at a lower luminosity.

Determination of the relative sign of the Higgs boson couplings to and bosons using production via vector-boson fusion with the ATLAS detector

Authors

Georges Aad,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Nordin Aranzabal Barrio,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Adam Bailey,Virginia Bailey,John Baines,Luke Baines,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta,Veena Balakrishnan

Published Date

2024/2/7

The associated production of Higgs and bosons via vector-boson fusion (VBF) is highly sensitive to the relative sign of the Higgs boson couplings to and bosons. In this Letter, two searches for this process are presented, using 140 fb of proton-proton collision data at = 13 TeV recorded by the ATLAS detector at the LHC. The first search targets scenarios with opposite-sign couplings of the and bosons to the Higgs boson, while the second targets Standard Model-like scenarios with same-sign couplings. Both analyses consider Higgs decays into a pair of -quarks and decays with an electron or muon. The opposite-sign coupling hypothesis is excluded with significance much greater than , and the observed (expected) upper limit set on the cross-section for VBF production is 9.0 (8.7) times the Standard Model value.

Precise test of lepton flavour universality in -boson decays into muons and electrons in collisions at TeV with the ATLAS detector

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Sara Abdelhameed,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Zainab Mohammad K Alsolami,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Robert Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,John Baines,Luke Baines,Keith Baker,Evelin Bakos

Published Date

2024/3/19

The ratio of branching ratios of the boson to muons and electrons, , has been measured using 140 fb of collision data at TeV collected with the ATLAS detector at the LHC, probing the universality of lepton couplings. The ratio is obtained from measurements of the production cross-section in the , and dilepton final states. To reduce systematic uncertainties, it is normalised by the square root of the corresponding ratio for the boson measured in inclusive and events. By using the precise value of determined from colliders, the ratio is determined to be . The three uncertainties correspond to data statistics, experimental systematics and the external measurement of , giving a total uncertainty of 0.0045, and confirming the Standard Model assumption of lepton flavour universality in -boson decays at the 0.5% level.

Search for non-resonant production of semi-visible jets using Run 2 data in ATLAS

Authors

Georges Aad,B Abbott,Kira Abeling,Nils Julius Abicht,SH Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,AC Abusleme Hoffman,Bobby Samir Acharya,C Adam Bourdarios,Leszek Adamczyk,Lukas Adamek,SV Addepalli,MJ Addison,Jahred Adelman,Aytül Adiguzel,Tim Adye,AA Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,M Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,TPA Åkesson,AV Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Martin Aleksa,IN Aleksandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,HMJ Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,BMM Allbrooke,Julia Frances Allen,CA Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,M Alvarez Estevez,A Alvarez Fernandez,M Alves Cardoso,MG Alviggi,Mohamed Aly,Y Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,CG Ames,Dante Amidei,SP Amor Dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,T Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,AV Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,JA Aparisi Pozo,MA Aparo,L Aperio Bella,Christian Appelt,Aram Apyan,N Aranzabal,Chiara Arcangeletti,ATH Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,J-H Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Jihad Assahsah,K Assamagan,Robert Astalos,S Atashi,Ryan Justin Atkin,M Atkinson,Hicham Atmani,PA Atmasiddha,Kamil Augsten,Silvia Auricchio,AD Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,F Backman,Anthony Badea,Paolo Bagnaia,Marzieh Bahmani,AJ Bailey,VR Bailey,JT Baines,Luke Baines,Christos Bakalis,OK Baker,Evelin Bakos,D Bakshi Gupta,Veena Balakrishnan,Rahul Balasubramanian

A search for the production of single-top-quarks in association with missing energy is performed in proton–proton collisions at a centre-of-mass energy of with the ATLAS experiment at the large hadron collider using data collected in 2012, corresponding to an integrated luminosity of fb. In this search, the boson from the top quark is required to decay into an electron or a muon and a neutrino. No deviation from the standard model prediction is observed, and upper limits are set on the production cross-section for resonant and non-resonant production of an invisible exotic state in association with a right-handed top quark. In the case of resonant production, for a spin- resonance with a mass of GeV, an effective coupling strength above is excluded at 95 confidence level for the top quark and an invisible spin- state with mass between and GeV. In the case of non-resonant production, an effective …

arXiv : Search for low-mass resonances decaying into two jets and produced in association with a photon or a jet at TeV with the ATLAS detector

Authors

Georges Aad,Alexander Kupco,Jay Chan,Kuo Ma,Miguel Angel Principe Martin,Pierre Antoine Delsart,Joey Huston,Yufeng Wang,Karl Jakobs,Ana Maria Rodriguez Vera,Savanna Shaw,Christian Ohm,Marina Cobal,Donal Joseph Mclaughlin,Gen Tateno,Sertac Ozturk,Xi Wang,Bruna Pascual,Jaroslava Schovancova,Ahmed Bassalat,Marjorie Shapiro,Grigore Tarna,Harry Simpson,Ketevi Adikle Assamagan,Maria Carnesale,Sinan Kuday,Maximiliano Sioli,Xiao Yang,Maximilian Emanuel Goblirsch-Kolb,Nello Bruscino,Adrian Alvarez Fernandez,Rahul Balasubramanian,Sarah Marie Demers Konezny,Fernando Monticelli,Andrei Snesarev,Wasikul Islam,Ying Wun Yvonne Ng,Osamu Jinnouchi,William Keaton Balunas,Thomas Michael Carter,Javier Alberto Aparisi Pozo,Benedict Martin Waugh,Javier Montejo Berlingen,Louie Dartmoor Corpe,David Miller,Anna Ivina,Paolo Mastrandrea,Ryan Peter Mckenzie,Laura Pintucci,Martin Spousta,Sergio Diez Cornell,Karel Cerny,Tristan Andrew Ruggeri,Federico Montereali,Hans Krueger,Asma Hadef,Michael Kwok Lam Chu,Bruce Donald Yabsley,Florent Bernon,Christian Weber,Daniela Bortoletto,Riccardo Longo,Stefan Tapprogge,Tatsuya Masubuchi,Dmitry Tsybyshev,Shenjian Chen,Juan Terron Cuadrado,Souad Batlamous,Tim Martin,Chiara Roda,Thi Ngoc Loan Truong,Mohamed Ouchrif,Tatiana Lyubushkina,Christian Grefe,Chen Jia,Mendes Jacques Da Costa,Antonio Manuel,Gianantonio Pezzullo,Laurynas Mince,Al Goshaw,Adam Edward Barton,Joni Pham,Zhijun Liang,Stefano Zambito,Sergey Karpov,Zahra Farazpay,Pavol Strizenec,Wainer Vandelli,Christopher Lester,Shuzhou Zhang,Biagio Di Micco,Yahya AR Khwaira,Mitch Norfolk,Giovanni Padovano,Philippe Schwemling,Marcel Vos,Evelin Meoni,Zackary Lee Alegria,Albert Kong,Julian Wollrath,Charlie Chen,Judith Hofer,Sreelakshmi Sindhu,Dan Andrei Ciubotaru,Nanni Darbo,Caterina Doglioni,Etienne Marie Fortin,Iacopo Vivarelli,George Iakovidis,Pawel Malecki,Jan Stark,Paul Gessinger-Befurt,Masahiro Kuze,Benjamin Henry Hooberman,Sonia Carra,Davide Costanzo,Michael James Fenton,Meghranjana Chatterjee,Kehang Bai,James William Howarth,Todd Brian Huffman,Geoffrey Norman Taylor,Alexander Undrus,Thorsten Kuhl,Giuliano Gustavino,Mateusz Dyndal,Luke Baines,Nils Julius Abicht,Ali Skaf,Paul Louis Tipton,Haider Abidi,Kathryn Grimm,Lisa Marie Baltes,Ian Brock,Maria Mironova,Andrey Kupich,Christopher Robyn Hayes,Jan Tuzlic Offermann,Seth Zenz,Serguei Kuleshov,Mike Strauss,Kai Zheng,Alexander Lory,Stefio Yosse Andrean,Alain Bellerive,Jiri Masik,Christoph Jagfeld,Edmund Xiang Lin Ting,Julie Kirk,Dominique Godin

Published Date

2024/3/13

The Standard Model of particle physics (SM) successfully describes a wide range of phenomena across many orders of magnitude of energy at colliders, astrophysical observatories, and other experiments [1]. Nevertheless it fails to account for many observed phenomena, such as the presence of dark matter (DM)[2–4] and the imbalance of matter over antimatter in the observable universe [5]. While there are a wide range of proposed models of physics beyond the SM (BSM) to explain these effects [6–17], this paper focuses on a search for a hadronically decaying resonance

Combination of searches for heavy spin-1 resonances using 139 fb of proton-proton collision data at TeV with the ATLAS detector

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,Adam Bailey,John Baines

Published Date

2024/2/21

A combination of searches for new heavy spin-1 resonances decaying into different pairings of , , or Higgs bosons, as well as directly into leptons or quarks, is presented. The data sample used corresponds to 139 fb of proton-proton collisions at = 13 TeV collected during 2015-2018 with the ATLAS detector at the CERN Large Hadron Collider. Analyses selecting quark pairs (, , , and ) or third-generation leptons ( and ) are included in this kind of combination for the first time. A simplified model predicting a spin-1 heavy vector-boson triplet is used. Cross-section limits are set at the 95% confidence level and are compared with predictions for the benchmark model. These limits are also expressed in terms of constraints on couplings of the heavy vector-boson triplet to quarks, leptons, and the Higgs boson. The complementarity of the various analyses increases the sensitivity to new physics, and the resulting constraints are stronger than those from any individual analysis considered. The data exclude a heavy vector-boson triplet with mass below 5.8 TeV in a weakly coupled scenario, below 4.4 TeV in a strongly coupled scenario, and up to 1.5 TeV in the case of production via vector-boson fusion.

Search for nearly mass-degenerate higgsinos using low-momentum mildly-displaced tracks in collisions at = 13 TeV with the ATLAS detector

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Robert Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,Adam Bailey,John Baines

Published Date

2024/1/30

Higgsinos with masses near the electroweak scale can solve the hierarchy problem and provide a dark matter candidate, while detecting them at the LHC remains challenging if their mass-splitting is (1 GeV). This Letter presents a novel search for nearly mass-degenerate higgsinos in events with an energetic jet, missing transverse momentum, and a low-momentum track with a significant transverse impact parameter using 140 fb of proton-proton collision data at = 13 TeV collected by the ATLAS experiment. For the first time since LEP, a range of mass-splittings between the lightest charged and neutral higgsinos from 0.3 GeV to 0.9 GeV is excluded at 95% confidence level, with a maximum reach of approximately 170 GeV in the higgsino mass.

Study of Z → l l γ decays at s = 8 TeV with the ATLAS detector

Authors

G Aad,B Abbott,D Abbott,K Abeling,S Abidi,A Aboulhorma,H Abramowicz,H Abreu,Y Abulaiti,A Hoffman,B Acharya,B Achkar,C Bourdarios,L Adamczyk,L Adamek,S Addepalli,J Adelman,A Adiguzel,S Adorni,T Adye,A Affolder,Y Afik,M Agaras,J Agarwala,A Aggarwal,C Agheorghiesei,J Aguilar-Saavedra,A Ahmad,F Ahmadov,W Ahmed,S Ahuja,X Ai,G Aielli,I Aizenberg,M Akbiyik,T Åkesson,A Akimov,K Khoury,G Alberghi,J Albert,P Albicocco,S Alderweireldt,M Aleksa,I Aleksandrov,C Alexa,T Alexopoulos,A Alfonsi,F Alfonsi,M Alhroob,B Ali,S Ali,M Aliev,G Alimonti,W Alkakhi,C Allaire,B Allbrooke,P Allport,A Aloisio,F Alonso,C Alpigiani,E Camelia,M Estevez,M Alviggi,M Aly,Y Coutinho,A Ambler,C Amelung,M Amerl,C Ames,D Amidei,S Santos,S Amoroso,K Amos,V Ananiev,C Anastopoulos,T Andeen,J Anders,S Andrean,A Andreazza,S Angelidakis,A Angerami,A Anisenkov,A Annovi,C Antel,M Anthony,E Antipov,M Antonelli,D Antrim,F Anulli,M Aoki,T Aoki,J Pozo,M Aparo,L Bella,C Appelt,N Aranzabal,V Ferraz,C Arcangeletti,A Arce,E Arena,JF Arguin,S Argyropoulos,JH Arling,A Armbruster,O Arnaez,H Arnold,Z Tame,G Artoni,H Asada,K Asai,S Asai,N Asbah,K Assamagan,R Astalos,R Atkin,M Atkinson,N Atlay,H Atmani,P Atmasiddha,K Augsten,S Auricchio,A Auriol,V Austrup,G Avner,G Avolio,K Axiotis,M Ayoub,G Azuelos,D Babal,H Bachacou,K Bachas,A Bachiu,F Backman,A Badea,P Bagnaia,M Bahmani,A Bailey,V Bailey,J Baines,C Bakalis,O Baker,P Bakker,E Bakos,D Gupta,S Balaji,R Balasubramanian,E Baldin,P Balek,E Ballabene,F Balli

Journal

European Physical Journal C

Published Date

2024/2/26

Search for electroweak production of supersymmetric particles in final states with two -leptons in = 13 TeV collisions with the ATLAS detector

Authors

Georges Aad,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Lukas Adamek,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Nordin Aranzabal Barrio,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Paolo Bagnaia,Marzieh Bahmani,Adam Bailey,Virginia Bailey,John Baines,Luke Baines,Christos Bakalis,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta,Veena Balakrishnan,Rahul Balasubramanian,Evgenii Baldin,Petr Balek

Published Date

2024/2/7

Three searches for the direct production of staus or charginos and neutralinos in final states with at least two hadronically decaying -leptons are presented. For chargino and neutralino production, decays via intermediate staus or and bosons are considered. The analysis uses a dataset of collisions corresponding to an integrated luminosity of 139 , recorded with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 13 TeV. No significant deviation from the expected Standard Model background is observed and SUSY particle mass limits at 95% confidence level are obtained in simplified models. For direct production of , chargino masses are excluded up to 970 GeV, while and masses up to 1160 GeV (330 GeV) are excluded for / production with subsequent decays via staus ( and bosons). Stau masses up to 500 GeV are excluded for mass degenerate scenarios and up to 425 GeV for -only scenarios. Sensitivity to -only scenarios from the ATLAS experiment is presented here for the first time, with masses excluded up to 350 GeV.

Measurement of -channel production of single top quarks and antiquarks in collisions at 13 TeV using the full ATLAS Run 2 data sample

Authors

Georges Aad,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Angel Abusleme,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Lukas Adamek,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Nordin Aranzabal Barrio,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Paolo Bagnaia,Marzieh Bahmani,Adam Bailey,Virginia Bailey,John Baines,Luke Baines,Christos Bakalis,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta,Veena Balakrishnan,Rahul Balasubramanian,Evgenii Baldin,Petr Balek

Published Date

2024/3/19

The production of single top quarks and top antiquarks via the -channel exchange of a virtual boson is measured in proton-proton collisions at a centre-of-mass energy of 13 TeV at the LHC using of ATLAS data. The total cross-sections are determined to be and for top-quark and top-antiquark production, respectively. The combined cross-section is found to be and the cross-section ratio is . The predictions at next-to-next-to-leading-order in quantum chromodynamics are in good agreement with these measurements. The predicted value of using different sets of parton distribution functions is compared with the measured value, demonstrating the potential to further constrain the functions when using this result in global fits. The measured cross-sections are interpreted in an effective field theory approach, setting limits at the 95% confidence level on the strength of a four-quark operator and an operator coupling the third quark generation to the Higgs boson doublet: and . The constraint at the 95% confidence level is derived from the measured value of . In a more general approach, pairs of CKM matrix elements involving top quarks are simultaneously constrained, leading to confidence contours in the corresponding two-dimensional parameter spaces.

arXiv: Performance of the ATLAS forward proton Time-of-Flight detector in Run 2

Authors

Georges Aad,Alexander Kupco,Jay Chan,Kuo Ma,Miguel Angel Principe Martin,Pierre Antoine Delsart,Joey Huston,Yufeng Wang,Karl Jakobs,Ana Maria Rodriguez Vera,Savanna Shaw,Christian Ohm,Marina Cobal,Donal Joseph Mclaughlin,Gen Tateno,Sertac Ozturk,Xi Wang,Bruna Pascual,Jaroslava Schovancova,Ahmed Bassalat,Marjorie Shapiro,Grigore Tarna,Harry Simpson,Ketevi Adikle Assamagan,Maria Carnesale,Sinan Kuday,Maximiliano Sioli,Xiao Yang,Maximilian Emanuel Goblirsch-Kolb,Nello Bruscino,Adrian Alvarez Fernandez,Rahul Balasubramanian,Sarah Marie Demers Konezny,Fernando Monticelli,Andrei Snesarev,Wasikul Islam,Ying Wun Yvonne Ng,Osamu Jinnouchi,William Keaton Balunas,Thomas Michael Carter,Javier Alberto Aparisi Pozo,Benedict Martin Waugh,Javier Montejo Berlingen,Jason Peter Gombas,David Miller,Anna Ivina,Paolo Mastrandrea,Ryan Peter Mckenzie,Laura Pintucci,Martin Spousta,Sergio Diez Cornell,Karel Cerny,Tristan Andrew Ruggeri,Federico Montereali,Hans Krueger,Asma Hadef,Michael Kwok Lam Chu,Bruce Donald Yabsley,Florent Bernon,Christian Weber,Alex Christopher Martyniuk,Daniela Bortoletto,Riccardo Longo,Stefan Tapprogge,Tatsuya Masubuchi,Dmitry Tsybyshev,Shenjian Chen,Juan Terron Cuadrado,Souad Batlamous,Tim Martin,Chiara Roda,Thi Ngoc Loan Truong,Mohamed Ouchrif,Tatiana Lyubushkina,Christian Grefe,Chen Jia,Mendes Jacques Da Costa,Antonio Manuel,Gianantonio Pezzullo,Laurynas Mince,Al Goshaw,Henri Bachacou,Joni Pham,Zhijun Liang,Stefano Zambito,Sergey Karpov,Zahra Farazpay,Pavol Strizenec,Wainer Vandelli,Christopher Lester,Shuzhou Zhang,Biagio Di Micco,Yahya AR Khwaira,Jonas Strandberg,Mitch Norfolk,Giovanni Padovano,Philippe Schwemling,Marcel Vos,Evelin Meoni,Zackary Lee Alegria,Albert Kong,Julian Wollrath,Charlie Chen,Judith Hofer,Sreelakshmi Sindhu,Dan Andrei Ciubotaru,Nanni Darbo,Caterina Doglioni,Etienne Marie Fortin,Iacopo Vivarelli,George Iakovidis,Pawel Malecki,Jan Stark,Paul Gessinger-Befurt,Masahiro Kuze,Benjamin Henry Hooberman,Sonia Carra,Davide Costanzo,Michael James Fenton,Meghranjana Chatterjee,Kehang Bai,James William Howarth,Todd Brian Huffman,Alexander Undrus,Thorsten Kuhl,Giuliano Gustavino,Mateusz Dyndal,Luke Baines,Nils Julius Abicht,Ali Skaf,Paul Louis Tipton,Haider Abidi,Kathryn Grimm,Lisa Marie Baltes,Ian Brock,Maria Mironova,Andrey Kupich,Christopher Robyn Hayes,Jan Tuzlic Offermann,Seth Zenz,Serguei Kuleshov,Mike Strauss,Kai Zheng,Alexander Lory,Stefio Yosse Andrean,Alain Bellerive,Jiri Masik,Christoph Jagfeld,Edmund Xiang Lin Ting,Julie Kirk

Published Date

2024/2/9

A significant fraction of proton–proton (pp) collisions at the LHC proceeds via processes where one or both protons stay intact, ie pp→ pX and pp→ pXp, respectively. When an intact proton is observed in the final state, it is typically accompanied by a large rapidity gap, a region devoid of hadronic activity [1, 2] between the final system X and the leading proton (s). This topology is usually explained in terms of an absence of colour connection between the outgoing proton (s) and the final state X. Most of such processes are called diffractive and are described by Pomeron exchange [3, 4].Diffractive processes include elastic scattering (pp→ pp), central diffractive processes (CD, pp→ pXp), single diffractive dissociation (SD, pp→ pX), and double diffractive dissociation (DD, pp→ XY). The intact protons produced in SD and CD processes emerge deflected at very small angles relative to the incoming proton beam, such that they escape detection in the ATLAS inner detector and calorimeters. They can be detected and measured using dedicated proton detectors positioned far from the interaction point (IP) and close to the beam. These are known as forward proton detectors. In ATLAS [5], there are two forward proton detector systems, Absolute Luminosity for ATLAS (ALFA)[6] and ATLAS Forward Proton detector system (AFP)[7]. The scope of ALFA is to measure elastic processes and soft diffractive dissociation processes, requiring special beam optics settings, while AFP is used to collect data with forward protons during the nominal operation of the ATLAS detector to probe mainly hard-scale diffractive and photon-induced processes.

Studies of new Higgs boson interactions through nonresonant HH production in the final state in pp collisions at = 13 TeV with the ATLAS detector

Authors

Georges Aad,B Abbott,Kira Abeling,Nils Julius Abicht,SH Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,C Adam Bourdarios,Leszek Adamczyk,SV Addepalli,MJ Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,AA Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,M Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,TPA Åkesson,AV Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,IN Aleksandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,HMJ Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,BMM Allbrooke,Julia Frances Allen,CA Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,M Alvarez Estevez,A Alvarez Fernandez,M Alves Cardoso,MG Alviggi,Mohamed Aly,Y Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,CG Ames,Dante Amidei,SP Amor Dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,T Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,AV Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,JA Aparisi Pozo,MA Aparo,L Aperio Bella,Christian Appelt,Aram Apyan,N Aranzabal,SJ Arbiol Val,Chiara Arcangeletti,ATH Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,J-H Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,K Assamagan,R Astalos,S Atashi,RJ Atkin,M Atkinson,H Atmani,PA Atmasiddha,K Augsten,S Auricchio,AD Auriol,VA Austrup,G Avolio,K Axiotis,G Azuelos,D Babal,H Bachacou,K Bachas,A Bachiu,F Backman,A Badea,TM Baer,P Bagnaia,M Bahmani,D Bahner,AJ Bailey,VR Bailey,JT Baines,L Baines,OK Baker,E Bakos,D Bakshi Gupta,V Balakrishnan

Journal

Journal of High Energy Physics

Published Date

2024/1

A search for nonresonant Higgs boson pair production in the final state is performed using 140 fb− 1 of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. This analysis supersedes and expands upon the previous nonresonant ATLAS results in this final state based on the same data sample. The analysis strategy is optimised to probe anomalous values not only of the Higgs (H) boson self-coupling modifier κ λ but also of the quartic HHVV (V= W, Z) coupling modifier κ 2V. No significant excess above the expected background from Standard Model processes is observed. An observed upper limit μ HH< 4.0 is set at 95% confidence level on the Higgs boson pair production cross-section normalised to its Standard Model prediction. The 95% confidence intervals for the coupling modifiers are− 1.4< κ λ< 6.9 and− 0.5< κ 2V< 2.7, assuming …

Measurement of vector boson production cross sections and their ratios using collisions at TeV with the ATLAS detector

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Sara Abdelhameed,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Zainab Mohammad K Alsolami,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Robert Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,John Baines,Luke Baines,Keith Baker,Evelin Bakos

Published Date

2024/3/21

Fiducial and total and boson cross sections, their ratios and the ratio of top-antitop-quark pair and -boson fiducial cross sections are measured in proton-proton collisions at a centre-of-mass energy of TeV, corresponding to an integrated luminosity of 29 fb of data collected in 2022 by the ATLAS experiment at the Large Hadron Collider. The measured fiducial cross-section values for , , and ( or ) boson productions are pb, pb, and pb, respectively, where the uncertainty is the total uncertainty, including that arising from the luminosity of about 2.2%. The measurements are in agreement with Standard-Model predictions calculated at next-to-next-to-leading-order in , next-to-next-to-leading logarithmic accuracy and next-to-leading-order electroweak accuracy.

Measurement of the W-boson mass and width with the ATLAS detector using proton-proton collisions at = 7 TeV

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Sara Abdelhameed,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Zainab Mohammad K Alsolami,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Robert Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,John Baines,Luke Baines,Keith Baker,Evelin Bakos

Published Date

2024/3/26

Proton-proton data recorded by the ATLAS detector in 2011, at a centre-of-mass energy of 7 TeV, have been used for an improved determination of the W-boson mass and a first measurement of the W-boson width at the LHC. Recent fits to the proton parton distribution functions are incorporated in the measurement procedure and an improved statistical method is used to increase the measurement precision. The measurement of the W-boson mass yields a value of MeV = MeV, and the width is measured as MeV = MeV. The first uncertainty components are statistical and the second correspond to the experimental and physics-modelling systematic uncertainties. Both results are consistent with the expectation from fits to electroweak precision data. The present measurement of is compatible with and supersedes the previous measurement performed using the same data.

Characterising the Higgs boson with ATLAS data from Run 2 of the LHC

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Robert Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,John Baines,Luke Baines,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta,Veena Balakrishnan

Published Date

2024/4/9

The Higgs boson was discovered by the ATLAS and CMS Collaborations in 2012 using data from Run 1 of the Large Hadron Collider (20102012). In Run 2 (20152018), about 140 fb of protonproton collisions at a centre-of-mass energy of 13 TeV were collected by the ATLAS experiment. This review presents the most important Run 2 results obtained by the ATLAS Collaboration regarding the properties of the Higgs boson and its interactions with other particles. The performed studies significantly enhance the understanding of the Higgs boson, while hunting for deviations from the predictions of the Standard Model of particle physics.

Evidence for the Higgs Boson Decay to a Z Boson and a Photon at the LHC

Authors

Georges Aad,B Abbott,Kira Abeling,Nils Julius Abicht,SH Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,C Adam Bourdarios,L Adamczyk,L Adamek,SV Addepalli,MJ Addison,J Adelman,Aytül Adiguzel,T Adye,AA Affolder,Y Afik,MN Agaras,J Agarwala,A Aggarwal,C Agheorghiesei,A Ahmad,F Ahmadov,WS Ahmed,S Ahuja,X Ai,G Aielli,A Aikot,M Ait Tamlihat,B Aitbenchikh,I Aizenberg,M Akbiyik,TPA Åkesson,AV Akimov,D Akiyama,NN Akolkar,K Al Khoury,GL Alberghi,J Albert,P Albicocco,GL Albouy,S Alderweireldt,M Aleksa,IN Aleksandrov,C Alexa,T Alexopoulos,F Alfonsi,M Algren,M Alhroob,B Ali,HMJ Ali,S Ali,SW Alibocus,M Aliev,G Alimonti,W Alkakhi,C Allaire,BMM Allbrooke,JF Allen,CA Allendes Flores,PP Allport,A Aloisio,F Alonso,C Alpigiani,M Alvarez Estevez,A Alvarez Fernandez,M Alves Cardoso,MG Alviggi,M Aly,Y Amaral Coutinho,A Ambler,C Amelung,M Amerl,CG Ames,D Amidei,SP Amor Dos Santos,KR Amos,V Ananiev,C Anastopoulos,T Andeen,JK Anders,SY Andrean,A Andreazza,S Angelidakis,A Angerami,AV Anisenkov,A Annovi,C Antel,MT Anthony,E Antipov,M Antonelli,F Anulli,M Aoki,T Aoki,JA Aparisi Pozo,MA Aparo,L Aperio Bella,C Appelt,A Apyan,N Aranzabal,C Arcangeletti,ATH Arce,E Arena,JF Arguin,S Argyropoulos,JH Arling,O Arnaez,H Arnold,G Artoni,H Asada,K Asai,S Asai,NA Asbah,J Assahsah,K Assamagan,R Astalos,S Atashi,RJ Atkin,M Atkinson,H Atmani,PA Atmasiddha,K Augsten,S Auricchio,AD Auriol,VA Austrup,G Avolio,K Axiotis,G Azuelos,D Babal,H Bachacou,K Bachas,A Bachiu,F Backman,A Badea,P Bagnaia,M Bahmani,AJ Bailey,VR Bailey,JT Baines,L Baines,C Bakalis,OK Baker,E Bakos,D Bakshi Gupta,V Balakrishnan,R Balasubramanian,EM Baldin

Journal

Physical review letters

Published Date

Authors

Georges Aad,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Nordin Aranzabal Barrio,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Jihad Assahsah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Adam Bailey,Virginia Bailey,John Baines,Luke Baines,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta,Veena Balakrishnan,Rahul Balasubramanian

Published Date

2023/9/7

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Robert Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,Adam Bailey,John Baines,Luke Baines

Published Date

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Robert Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,John Baines,Luke Baines,Keith Baker

Published Date

2024/3/20

The Large Hadron Collider is at the high-energy frontier of particle physics, having produced protonproton collisions during Run 2, from 2015 to 2018, at an unprecedented centre-of-mass energy of 13 TeV. The ATLAS experiment has a broad programme to thoroughly explore this uncharted territory, to seek out new exotic particles predicted by theories that boldly go beyond the Standard Model. Although the Standard Model has been very successful, it leaves many questions unanswered, prompting novel ideas about particles that could be hiding in the data, waiting to be discovered by intrepid explorers. These include dark-matter candidates, hidden-sector particles, new vector resonances, leptoquarks, and vector-like quarks, to name a few examples. Searches for new particles are reported here, with the exception of searches for supersymmetry or extended Higgs sectors as these are the subjects of separate reports.

Measurements of the production cross-section for a boson in association with - or -jets in proton-proton collisions at TeV with the ATLAS detector

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Sara Abdelhameed,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Zainab Mohammad K Alsolami,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Robert Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,John Baines,Luke Baines,Keith Baker,Evelin Bakos

Authors

G Aad,B Abbott,DC Abbott,A Abed Abud,K Abeling,DK Abhayasinghe,SH Abidi,A Aboulhorma,H Abramowicz,H Abreu,Y Abulaiti,AC Abusleme Hoffman,BS Acharya,B Achkar,L Adam,C Adam Bourdarios,L Adamczyk,L Adamek,SV Addepalli,J Adelman,A Adiguzel,S Adorni,T Adye,AA Affolder,Y Afik,MN Agaras,J Agarwala,A Aggarwal,C Agheorghiesei,JA Aguilar-Saavedra,A Ahmad,F Ahmadov,WS Ahmed,X Ai,G Aielli,I Aizenberg,M Akbiyik,TPA Åkesson,AV Akimov,K Al Khoury,GL Alberghi,J Albert,P Albicocco,MJ Alconada Verzini,S Alderweireldt,M Aleksa,IN Aleksandrov,C Alexa,T Alexopoulos,A Alfonsi,F Alfonsi,M Alhroob,B Ali,S Ali,M Aliev,G Alimonti,C Allaire,BMM Allbrooke,PP Allport,A Aloisio,F Alonso,C Alpigiani,E Alunno Camelia,M Alvarez Estevez,MG Alviggi,Y Amaral Coutinho,A Ambler,L Ambroz,C Amelung,D Amidei,SPAD Santos,S Amoroso,KR Amos,CS Amrouche,V Ananiev,C Anastopoulos,N Andari,T Andeen,JK Anders,SY Andrean,A Andreazza,S Angelidakis,A Angerami,AV Anisenkov,A Annovi,C Antel,MT Anthony,E Antipov,M Antonelli,DJA Antrim,F Anulli,M Aoki,JA Aparisi Pozo,MA Aparo,L Aperio Bella,C Appelt,N Aranzabal,V Araujo Ferraz,C Arcangeletti,ATH Arce,E Arena,J-F Arguin,S Argyropoulos,J-H Arling,AJ Armbruster,O Arnaez,H Arnold,ZP Arrubarrena Tame,G Artoni,H Asada,K Asai,S Asai,NA Asbah,EM Asimakopoulou,J Assahsah,K Assamagan,R Astalos,RJ Atkin,M Atkinson,NB Atlay,H Atmani,PA Atmasiddha,K Augsten,S Auricchio,VA Austrup,G Avner,G Avolio,MK Ayoub,G Azuelos,D Babal,H Bachacou,K Bachas,A Bachiu,F Backman,A Badea,P Bagnaia,M Bahmani,AJ Bailey,VR Bailey,JT Baines,C Bakalis,OK Baker,PJ Bakker,E Bakos,D Bakshi Gupta,S Balaji,R Balasubramanian,EM Baldin,P Balek,E Ballabene

Journal

Computing and Software for Big Science

Published Date

2024/3/5

The need for large-scale production of highly accurate simulated event samples for the extensive physics programme of the ATLAS experiment at the Large Hadron Collider motivates the development of new simulation techniques. Building on the recent success of deep learning algorithms, variational autoencoders and generative adversarial networks are investigated for modelling the response of the central region of the ATLAS electromagnetic calorimeter to photons of various energies. The properties of synthesised showers are compared with showers from a full detector simulation using geant4. Both variational autoencoders and generative adversarial networks are capable of quickly simulating electromagnetic showers with correct total energies and stochasticity, though the modelling of some shower shape distributions requires more refinement. This feasibility study demonstrates the potential of using such algorithms for ATLAS fast calorimeter simulation in the future and shows a possible way to complement current simulation techniques.

A search for R-parity-violating supersymmetry in final states containing many jets in collisions at with the ATLAS detector

Authors

Georges Aad,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Nordin Aranzabal Barrio,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,Adam Bailey,Virginia Bailey,John Baines,Luke Baines,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta

Published Date

2024/1/30

A search for R-parity-violating supersymmetry in final states with high jet multiplicity is presented. The search uses of proton--proton collision data at collected by the ATLAS experiment during Run 2 of the Large Hadron Collider. The results are interpreted in the context of R-parity-violating supersymmetry models that feature prompt gluino-pair production decaying directly to three jets each or decaying to two jets and a neutralino which subsequently decays promptly to three jets. No significant excess over the Standard Model expectation is observed and exclusion limits at the 95% confidence level are extracted. Gluinos with masses up to 1800 GeV are excluded when decaying directly to three jets. In the cascade scenario, gluinos with masses up to 2340 GeV are excluded for a neutralino with mass up to 1250 GeV

Differential cross-sections for events with missing transverse momentum and jets measured with the ATLAS detector in 13 TeV proton-proton collisions

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Robert Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,Adam Bailey,John Baines,Luke Baines

Published Date

2024/3/19

Measurements of inclusive, differential cross-sections for the production of events with missing transverse momentum in association with jets in proton-proton collisions at ~TeV are presented. The measurements are made with the ATLAS detector using an integrated luminosity of 140~fb and include measurements of dijet distributions in a region in which vector-boson fusion processes are enhanced. They are unfolded to correct for detector resolution and efficiency within the fiducial acceptance, and are designed to allow robust comparisons with a wide range of theoretical predictions. A measurement of differential cross sections for the process is made. The measurements are generally well-described by Standard Model predictions except for the dijet invariant mass distribution. Auxiliary measurements of the hadronic system recoiling against isolated leptons, and photons, are also made in the same phase space. Ratios between the measured distributions are then derived, to take advantage of cancellations in modelling effects and some of the major systematic uncertainties. These measurements are sensitive to new phenomena, and provide a mechanism to easily set constraints on phenomenological models. To illustrate the robustness of the approach, these ratios are compared with two common Dark Matter models, where the constraints derived from the measurement are comparable to those set by dedicated detector-level searches.

Measurements of Lund subjet multiplicities in 13 TeV proton-proton collisions with the ATLAS detector

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,John Baines,Luke Baines

Published Date

2024/2/21

This Letter presents a differential cross-section measurement of Lund subjet multiplicities, suitable for testing current and future parton shower Monte Carlo algorithms. This measurement is made in dijet events in 140 fb of TeV proton-proton collision data collected with the ATLAS detector at CERN's Large Hadron Collider. The data are unfolded to account for acceptance and detector-related effects, and are then compared with several Monte Carlo models and to recent resummed analytical calculations. The experimental precision achieved in the measurement allows tests of higher-order effects in QCD predictions. Most predictions fail to accurately describe the measured data, particularly at large values of jet transverse momentum accessible at the Large Hadron Collider, indicating the measurement's utility as an input to future parton shower developments and other studies probing fundamental properties of QCD and the production of hadronic final states up to the TeV-scale.

Measurement of the production cross-section of and mesons in pp collisions at TeV with the ATLAS detector

Authors

ATLAS Collaboration atlas. publications@ cern. ch,G Aad,B Abbott,K Abeling,NJ Abicht,SH Abidi,A Aboulhorma,H Abramowicz,H Abreu,Y Abulaiti,BS Acharya,C Adam Bourdarios,L Adamczyk,SV Addepalli,MJ Addison,J Adelman,A Adiguzel,T Adye,AA Affolder,Y Afik,MN Agaras,J Agarwala,A Aggarwal,C Agheorghiesei,A Ahmad,F Ahmadov,WS Ahmed,S Ahuja,X Ai,G Aielli,A Aikot,M Ait Tamlihat,B Aitbenchikh,I Aizenberg,M Akbiyik,TPA Åkesson,AV Akimov,D Akiyama,NN Akolkar,K Al Khoury,GL Alberghi,J Albert,P Albicocco,GL Albouy,S Alderweireldt,M Aleksa,IN Aleksandrov,C Alexa,T Alexopoulos,F Alfonsi,M Algren,M Alhroob,B Ali,HMJ Ali,S Ali,SW Alibocus,M Aliev,G Alimonti,W Alkakhi,C Allaire,BMM Allbrooke,JF Allen,CA Allendes Flores,PP Allport,A Aloisio,F Alonso,C Alpigiani,M Alvarez Estevez,A Alvarez Fernandez,M Alves Cardoso,MG Alviggi,M Aly,Y Amaral Coutinho,A Ambler,C Amelung,M Amerl,CG Ames,D Amidei,SP Amor Dos Santos,KR Amos,V Ananiev,C Anastopoulos,T Andeen,JK Anders,SY Andrean,A Andreazza,S Angelidakis,A Angerami,AV Anisenkov,A Annovi,C Antel,MT Anthony,E Antipov,M Antonelli,F Anulli,M Aoki,T Aoki,JA Aparisi Pozo,MA Aparo,L Aperio Bella,C Appelt,A Apyan,N Aranzabal,SJ Arbiol Val,C Arcangeletti,ATH Arce,E Arena,J-F Arguin,S Argyropoulos,J-H Arling,O Arnaez,H Arnold,G Artoni,H Asada,K Asai,S Asai,NA Asbah,K Assamagan,Robert Astalos,S Atashi,Ryan Justin Atkin,M Atkinson,Hicham Atmani,PA Atmasiddha,Kamil Augsten,Silvia Auricchio,AD Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,F Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,AJ Bailey,VR Bailey,JT Baines,Luke Baines,OK Baker,Evelin Bakos,D Bakshi Gupta,Veena Balakrishnan,Rahul Balasubramanian,EM Baldin

Journal

The European Physical Journal C

Published Date

2024/2/19

Authors

Georges Aad,Erlend Aakvaag,Braden Keim Abbott,Sara Abdelhameed,Kira Abeling,Nils Julius Abicht,Haider Abidi,Mohammed Aboelela,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Anke Ackermann,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Zainab Mohammad K Alsolami,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Kyle Amirie,Susana Patricia Amor dos Santos,Kieran Robert Amos,Shiwen An,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Karl Sten Vilhelm Astrand,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Kehang Bai,John Baines,Luke Baines,Keith Baker,Evelin Bakos

Published Date

2024/3/26

Authors

Published Date

2024/2/21

This paper presents a search for top-squark pair production in final states with a top quark, a charm quark and missing transverse momentum. The data were collected with the ATLAS detector during LHC Run 2 and corresponds to an integrated luminosity of 139fb of proton-proton collisions at a centre-of-mass energy of = 13 TeV. The analysis is motivated by an extended Minimal Supersymmetric Standard Model featuring a non-minimal flavour violation in the second- and third-generation squark sector. The top squark in this model has two possible decay modes, either or , where the is undetected. The analysis is optimised assuming that both of the decay modes are equally probable, leading to the most likely final state of . Good agreement is found between the Standard Model expectation and the data in the search regions. Exclusion limits at 95% CL are obtained in the vs plane and, in addition, limits on the branching ratio of the decay as a function of are also produced. Top-squark masses of up to 800 GeV are excluded for scenarios with light neutralinos, and top-squark masses up to 600 GeV are excluded in scenarios where the neutralino and the top squark are almost mass degenerate.

Study of decays at = 8 TeV with the ATLAS detector

Authors

N Null,G Aad,B Abbott,Dc Abbott,K Abeling,Sh Abidi,A Aboulhorma,H Abramowicz,H Abreu,Y Abulaiti,Aca Hoffman,Bs Acharya,B Achkar,Ca Bourdarios,L Adamczyk,L Adamek,Sv Addepalli,J Adelman,A Adiguzel,S Adorni,T Adye,Aa Affolder,Y Afik,Mn Agaras,J Agarwala,A Aggarwal,C Agheorghiesei,Ja Aguilar-Saavedra,A Ahmad,F Ahmadov,Ws Ahmed,S Ahuja,X Ai,G Aielli,I Aizenberg,M Akbiyik,Tpa Åkesson,Av Akimov,Ka Khoury,Gl Alberghi,J Albert,P Albicocco,S Alderweireldt,M Aleksa,In Aleksandrov,C Alexa,T Alexopoulos,A Alfonsi,F Alfonsi,M Alhroob,B Ali,S Ali,M Aliev,G Alimonti,W Alkakhi,C Allaire,Bmm Allbrooke,Pp Allport,A Aloisio,F Alonso,C Alpigiani,Ea Camelia,Ma Estevez,Mg Alviggi,M Aly,Ya Coutinho,A Ambler,C Amelung,M Amerl,Cg Ames,D Amidei,Spad Santos,S Amoroso,Kr Amos,V Ananiev,C Anastopoulos,T Andeen,Jk Anders,Sy Andrean,A Andreazza,S Angelidakis,A Angerami,Av Anisenkov,A Annovi,C Antel,Mt Anthony,E Antipov,M Antonelli,Dja Antrim,F Anulli,M Aoki,T Aoki,Jaa Pozo,Ma Aparo,La Bella,C Appelt,N Aranzabal,Va Ferraz,C Arcangeletti,Ath Arce,E Arena,J Arguin,S Argyropoulos,Jh Arling,Aj Armbruster,O Arnaez,H Arnold,Zpa Tame,G Artoni,H Asada,K Asai,S Asai,Na Asbah,K Assamagan,R Astalos,Rj Atkin,M Atkinson,Nb Atlay,H Atmani,Pa Atmasiddha,K Augsten,S Auricchio,Ad Auriol,Va Austrup,G Avner,G Avolio,K Axiotis,Mk Ayoub,G Azuelos,D Babal,H Bachacou,K Bachas,A Bachiu,F Backman,A Badea,P Bagnaia,M Bahmani,Aj Bailey,Vr Bailey,Jt Baines,C Bakalis,Ok Baker,Pj Bakker,E Bakos,Db Gupta,S Balaji,R Balasubramanian,Em Baldin,P Balek,E Ballabene

Journal

EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS

Published Date

2024

This paper presents a study of Z→ llγ decays with the ATLAS detector at the Large Hadron Collider. The analysis uses a proton–proton data sample corresponding to an integrated luminosity of 20.2 fb− 1 collected at a centre-of mass energy√ s= 8 TeV. Integrated fiducial cross-sections together with normalised differential fiducial cross-sections, sensitive to the kinematics of final-state QED radiation, are obtained. The results are found to be in agreement with state of-the-art predictions for final-state QED radiation. First measurements of Z→ llγ γ decays are also reported

Fiducial and differential cross-section measurements of electroweak production in collisions at TeV with the ATLAS detector

Authors

Georges Aad,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Angel Abusleme,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Lukas Adamek,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Alice Alfonsi,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Daniel Joseph Antrim,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Nordin Aranzabal Barrio,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Aaron James Armbruster,Olivier Arnaez,Hannah Arnold,Zulit Paola Arrubarrena Tame,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Jihad Assahsah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Naim Bora Atlay,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Paolo Bagnaia,Marzieh Bahmani,Adam Bailey,Virginia Bailey,John Baines,Christos Bakalis,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta,Rahul Balasubramanian

Published Date

2023/4/24

Authors

Georges Aad,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Nordin Aranzabal Barrio,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Jihad Assahsah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Adam Bailey,Virginia Bailey,John Baines,Luke Baines,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta

Published Date

2023/12/20

This paper presents a study of Higgs boson production in association with a vector boson (V = W or Z) in the fully hadronic $qqbb$ final state using data recorded by the ATLAS detector at the LHC in proton-proton collisions at $\sqrt{s}=13$ TeV and corresponding to an integrated luminosity of 137 fb$^{-1}$. The vector bosons and Higgs bosons are each reconstructed as large-radius jets and tagged using jet substructure techniques. Dedicated tagging algorithms exploiting $b$-tagging properties are used to identify jets consistent with Higgs bosons decaying into $b\bar{b}$. Dominant backgrounds from multijet production are determined directly from the data, and a likelihood fit to the jet mass distribution of Higgs boson candidates is used to extract the number of signal events. The VH production cross section is measured inclusively and differentially in several ranges of Higgs boson transverse momentum: 250-450, 450--650, and greater than 650 GeV. The inclusive signal yield relative to the Standard Model expectation is observed to be $\mu = 1.4 ^{+1.0}_{-0.9}$ and the corresponding cross section is $3.1 \pm 1.3\, (stat.)\: ^{+1.8}_{-1.4}\, (syst.$) pb.

Measurement of production cross-sections in the four-lepton final state in collisions at TeV with the ATLAS experiment

Authors

Georges Aad,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Nordin Aranzabal Barrio,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Jihad Assahsah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Adam Bailey,Virginia Bailey,John Baines,Luke Baines,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta

Published Date

2023/11/21

This paper reports cross-section measurements of production in collisions at TeV at the Large Hadron Collider. The data were collected by the ATLAS detector in 2022, and correspond to an integrated luminosity of 29 fb. Events in the (, ) final states are selected and used to measure the inclusive and differential cross-sections in a fiducial region defined close to the analysis selections. The inclusive cross-section is further extrapolated to the total phase space with a requirement of 66 116 GeV for both bosons, yielding pb. The results are well described by the Standard Model predictions.

Search for direct production of electroweakinos in final states with one lepton, jets and missing transverse momentum in pp collisions at = 13 TeV with the ATLAS …

Authors

Georges Aad,B Abbott,Kira Abeling,Nils Julius Abicht,SH Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,C Adam Bourdarios,Leszek Adamczyk,SV Addepalli,MJ Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,AA Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,M Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,TPA Åkesson,AV Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Martin Aleksa,IN Aleksandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,HMJ Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,BMM Allbrooke,Julia Frances Allen,CA Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,M Alvarez Estevez,A Alvarez Fernandez,M Alves Cardoso,MG Alviggi,Mohamed Aly,Y Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,CG Ames,Dante Amidei,SP Amor Dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,T Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,AV Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,JA Aparisi Pozo,MA Aparo,L Aperio Bella,Christian Appelt,Aram Apyan,N Aranzabal,SJ Arbiol Val,Chiara Arcangeletti,ATH Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,J-H Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Jihad Assahsah,K Assamagan,Robert Astalos,S Atashi,Ryan Justin Atkin,M Atkinson,Hicham Atmani,PA Atmasiddha,Kamil Augsten,Silvia Auricchio,AD Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,F Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,AJ Bailey,VR Bailey,JT Baines,Luke Baines,OK Baker,Evelin Bakos,D Bakshi Gupta,Veena Balakrishnan,Rahul Balasubramanian

Journal

Journal of High Energy Physics

Published Date

2023/12

Searches for electroweak production of wino-like chargino pairs,, and of wino-like chargino and next-to-lightest neutralino,, are presented. The models explored assume that the charginos decay into a W boson and the lightest neutralino,. The next-to-lightest neutralinos are degenerate in mass with the chargino and decay to and either a Z or a Higgs boson, or. The searches exploit the presence of a single isolated lepton and missing transverse momentum from the W boson decay products and the lightest neutralinos, and the presence of jets from hadronically decaying Z or W bosons or from the Higgs boson decaying into a pair of b-quarks. The searches use 139 fb− 1 of= 13 TeV proton-proton collisions data collected by the ATLAS detector at the Large Hadron Collider between 2015 and 2018. No deviations from the Standard Model expectations are found, and 95% confidence level exclusion limits …

Search for heavy long-lived multi-charged particles in the full LHC Run 2 pp collision data at s= 13 TeV using the ATLAS detector

Authors

G Aad,B Abbott,J Abdallah,R Aben,M Abolins,OS AbouZeid,H Abramowicz,H Abreu,R Abreu,Y Abulaiti,BS Acharya,L Adamczyk,DL Adams,J Adelman,S Adomeit,T Adye,AA Affolder,T Agatonovic-Jovin,JA Aguilar-Saavedra,SP Ahlen,F Ahmadov,G Aielli,H Akerstedt,TPA Åkesson,G Akimoto,AV Akimov,GL Alberghi,J Albert,S Albrand,MJ Alconada Verzini,M Aleksa,IN Aleksandrov,C Alexa,G Alexander,T Alexopoulos,M Alhroob,G Alimonti,L Alio,J Alison,SP Alkire,BMM Allbrooke,PP Allport,A Aloisio,A Alonso,F Alonso,C Alpigiani,A Altheimer,B Alvarez Gonzalez,D Álvarez Piqueras,MG Alviggi,K Amako,Y Amaral Coutinho,C Amelung,D Amidei,SP Amor Dos Santos,A Amorim,S Amoroso,N Amram,G Amundsen,C Anastopoulos,LS Ancu,N Andari,T Andeen,CF Anders,G Anders,JK Anders,KJ Anderson,A Andreazza,V Andrei,S Angelidakis,I Angelozzi,P Anger,A Angerami,F Anghinolfi,AV Anisenkov,N Anjos,A Annovi,M Antonelli,A Antonov,J Antos,F Anulli,M Aoki,L Aperio Bella,G Arabidze,Y Arai,JP Araque,ATH Arce,FA Arduh,JF Arguin,S Argyropoulos,M Arik,AJ Armbruster,O Arnaez,V Arnal,H Arnold,M Arratia,O Arslan,A Artamonov,G Artoni,S Asai,N Asbah,A Ashkenazi,B Åsman,L Asquith,K Assamagan,R Astalos,M Atkinson,NB Atlay,B Auerbach,K Augsten,M Aurousseau,G Avolio,B Axen,MK Ayoub,G Azuelos,MA Baak,AE Baas,C Bacci,H Bachacou,K Bachas,M Backes,M Backhaus,P Bagiacchi,P Bagnaia,Y Bai,T Bain,JT Baines,OK Baker,P Balek,T Balestri,F Balli,E Banas,Sw Banerjee,AAE Bannoura,HS Bansil,L Barak,EL Barberio,D Barberis,M Barbero,T Barillari,M Barisonzi,T Barklow,N Barlow,SL Barnes,BM Barnett,RM Barnett,Z Barnovska,A Baroncelli,G Barone,AJ Barr

Published Date

2015

A search for heavy long-lived multi-charged particles is performed using the ATLAS detector at the LHC. Data collected in 2012 at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document}s=8 TeV from pp collisions corresponding to an integrated luminosity of 20.3 fb\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document}-1are examined. Particles producing anomalously high ionisation, consistent with long-lived massive particles with electric charges from \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document}|q|=2e to \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document}|q|=6e are searched for. No signal candidate events are observed, and 95 % confidence level cross-section upper limits are interpreted as lower mass limits for a Drell–Yan production model. The mass limits range between …

Search for short- and long-lived axion-like particles in decays with the ATLAS experiment at the LHC

Authors

Georges Aad,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Nordin Aranzabal Barrio,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Jihad Assahsah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Adam Bailey,Virginia Bailey,John Baines,Luke Baines,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta,Veena Balakrishnan,Rahul Balasubramanian,Evgenii Baldin

Published Date

2023/12/14

Presented is the search for anomalous Higgs boson decays into two axion-like particles (ALPs) using the full Run 2 data set of 140 fb of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS experiment. The ALPs are assumed to decay into two photons, providing sensitivity to recently proposed models that could explain the discrepancy. This analysis covers an ALP mass range from 100 MeV to 62 GeV and ALP-photon couplings in the range , and therefore includes signatures with significantly displaced vertices and highly collinear photons. No significant excess of events above the Standard Model background is observed. Upper limits at 95% confidence level are placed on the branching ratio of the Higgs boson to two ALPs in the four-photon final state, and are in the range of to , depending on the hypothesized ALP mass and ALP-photon coupling strength.

Observation of quantum entanglement in top-quark pairs using the ATLAS detector

Authors

Georges Aad,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Sina Aktas,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Zackary Lee Alegria,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Sergio Javier Arbiol Val,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Tamas Marton Baer,Paolo Bagnaia,Marzieh Bahmani,Daniel Bahner,Adam Bailey,Virginia Bailey,John Baines,Luke Baines,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta,Veena Balakrishnan,Rahul Balasubramanian

Published Date

2023/11/20

We report the highest-energy observation of entanglement, in topantitop quark events produced at the Large Hadron Collider, using a protonproton collision data set with a center-of-mass energy of TeV and an integrated luminosity of 140 fb recorded with the ATLAS experiment. Spin entanglement is detected from the measurement of a single observable , inferred from the angle between the charged leptons in their parent top- and antitop-quark rest frames. The observable is measured in a narrow interval around the topantitop quark production threshold, where the entanglement detection is expected to be significant. It is reported in a fiducial phase space defined with stable particles to minimize the uncertainties that stem from limitations of the Monte Carlo event generators and the parton shower model in modelling top-quark pair production. The entanglement marker is measured to be for GeV. The observed result is more than five standard deviations from a scenario without entanglement and hence constitutes both the first observation of entanglement in a pair of quarks and the highest-energy observation of entanglement to date.

Search for vector-boson resonances decaying into a top quark and a bottom quark using pp collisions at = 13 TeV with the ATLAS detector

Authors

Georges Aad,B Abbott,Kira Abeling,Nils Julius Abicht,SH Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,AC Abusleme Hoffman,Bobby Samir Acharya,C Adam Bourdarios,Leszek Adamczyk,Lukas Adamek,SV Addepalli,MJ Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,AA Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,M Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,TPA Åkesson,AV Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Martin Aleksa,IN Aleksandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,HMJ Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,BMM Allbrooke,Julia Frances Allen,CA Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,M Alvarez Estevez,A Alvarez Fernandez,M Alves Cardoso,MG Alviggi,Mohamed Aly,Y Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,CG Ames,Dante Amidei,SP Amor Dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,T Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,AV Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,JA Aparisi Pozo,MA Aparo,L Aperio Bella,Christian Appelt,Aram Apyan,N Aranzabal,Chiara Arcangeletti,ATH Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,J-H Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Jihad Assahsah,K Assamagan,Robert Astalos,S Atashi,Ryan Justin Atkin,M Atkinson,Hicham Atmani,PA Atmasiddha,Kamil Augsten,Silvia Auricchio,AD Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,F Backman,Anthony Badea,Paolo Bagnaia,Marzieh Bahmani,AJ Bailey,VR Bailey,JT Baines,Luke Baines,Christos Bakalis,OK Baker,Evelin Bakos,D Bakshi Gupta,Veena Balakrishnan,Rahul Balasubramanian

Authors

Georges Aad,Braden Keim Abbott,Kira Abeling,Nils Julius Abicht,Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Angel Abusleme,Bobby Samir Acharya,Claire Adam Bourdarios,Leszek Adamczyk,Lukas Adamek,Sagar Addepalli,Matt Addison,Jahred Adelman,Aytul Adiguzel,Tim Adye,Tony Affolder,Yoav Afik,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Sudha Ahuja,Xiaocong Ai,Giulio Aielli,Arya Aikot,Malak Ait Tamlihat,Brahim Aitbenchikh,Iakov Aizenberg,Melike Akbiyik,Torsten Akesson,Andrei Akimov,Daiya Akiyama,Nilima Nilesh Akolkar,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,Guillaume Lucas Albouy,Sara Alderweireldt,Martin Aleksa,Igor Alexandrov,Calin Alexa,Theodoros Alexopoulos,Fabrizio Alfonsi,Malte Algren,Muhammad Alhroob,Babar Ali,Hanadi Ali,Shahzad Ali,Samuel William Alibocus,Malik Aliev,Gianluca Alimonti,Wael Alkakhi,Corentin Allaire,Benedict Allbrooke,Julia Frances Allen,Cristian Andres Allendes Flores,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,Manuel Alvarez Estevez,Adrian Alvarez Fernandez,Mario Alves Cardoso,Mariagrazia Alviggi,Mohamed Aly,Yara Do Amaral Coutinho,Alessandro Ambler,Christoph Amelung,Maximilian Amerl,Christoph Ames,Dante Amidei,Susana Patricia Amor dos Santos,Kieran Robert Amos,Viktor Ananiev,Christos Anastopoulos,Timothy Robert Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,Alexey Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,Fabio Anulli,Masato Aoki,Takumi Aoki,Javier Alberto Aparisi Pozo,Marco Aparo,Ludovica Aperio Bella,Christian Appelt,Aram Apyan,Nordin Aranzabal Barrio,Chiara Arcangeletti,Ayana Tamu Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,Jan-Hendrik Arling,Olivier Arnaez,Hannah Arnold,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Jihad Assahsah,Ketevi Adikle Assamagan,Robert Astalos,Rose Atashi,Ryan Justin Atkin,Markus Julian Atkinson,Hicham Atmani,Prachi Atmasiddha,Kamil Augsten,Silvia Auricchio,Adrien Auriol,Volker Andreas Austrup,Giuseppe Avolio,Konstantinos Axiotis,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,Karl Filip Backman,Anthony Badea,Paolo Bagnaia,Marzieh Bahmani,Adam Bailey,Virginia Bailey,John Baines,Luke Baines,Christos Bakalis,Keith Baker,Evelin Bakos,Debottam Bakshi Gupta,Veena Balakrishnan,Rahul Balasubramanian

Published Date

2023/12/14

Measurements of the substructure of top-quark jets are presented, using 140 fb of 13 TeV collision data recorded with the ATLAS detector at the LHC. Top-quark jets reconstructed with the anti- algorithm with a radius parameter are selected in top-quark pair () events where one top quark decays semileptonically and the other hadronically, or where both top quarks decay hadronically. The top-quark jets are required to have transverse momentum GeV, yielding large samples of data events with jet values between 350 and 600 GeV. One- and two-dimensional differential cross-sections for eight substructure variables, defined using only the charged components of the jets, are measured in a particle-level phase space by correcting for the smearing and acceptance effects induced by the detector. The differential cross-sections are compared with the predictions of several Monte Carlo simulations in which top-quark pair-production quantum chromodynamic matrix-element calculations at next-to-leading-order precision in the strong coupling constant are passed to leading-order parton shower and hadronization generators. The Monte Carlo predictions for measures of the broadness, and also the two-body structure, of the top-quark jets are found to be in good agreement with the measurements, while variables sensitive to the three-body structure of the top-quark jets exhibit some tension with the measured distributions.

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