Andreas Warburton

McGill University

H-index: 248

North America-Canada

About Andreas Warburton

Andreas Warburton, With an exceptional h-index of 248 and a recent h-index of 147 (since 2020), a distinguished researcher at McGill University, specializes in the field of Physics, Particle Physics, High Energy Physics, Instrumentation, Elementary Particle Physics.

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

Differential cross-section measurements of the production of four charged leptons in association with two jets using the ATLAS detector

Observation of WZγ Production in pp Collisions at s= 13 TeV with the ATLAS Detector

Probing the CP nature of the top–Higgs Yukawa coupling in tt¯ H and tH events with H→ bb¯ decays using the ATLAS detector at the LHC

A precise measurement of the Z-boson double-differential transverse momentum and rapidity distributions in the full phase space of the decay leptons with the ATLAS …

Measurement of the tt¯ cross section and its ratio to the Z production cross section using pp collisions at s= 13.6 TeV with the ATLAS detector

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

Search for non-resonant Higgs boson pair production in the final state in pp collisions at = 13 TeV with the ATLAS detector

Search for the decay of the Higgs boson to a Z boson and a light pseudoscalar particle decaying to two photons

Andreas Warburton Information

University	McGill University
Position	Professor of Physics
Citations(all)	385127
Citations(since 2020)	130817
Cited By	233029
hIndex(all)	248
hIndex(since 2020)	147
i10Index(all)	1550
i10Index(since 2020)	929
Email	Access Email
University Profile Page	McGill University

Andreas Warburton Skills & Research Interests

Physics

Particle Physics

High Energy Physics

Instrumentation

Elementary Particle Physics

Top articles of Andreas Warburton

Differential cross-section measurements of the production of four charged leptons in association with two jets using 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

Journal

Journal of High Energy Physics

Published Date

2024/1

Differential cross-sections are measured for the production of four charged leptons in association with two jets. These measurements are sensitive to final states in which the jets are produced via the strong interaction as well as to the purely-electroweak vector boson scattering process. The analysis is performed using proton-proton collision data collected by ATLAS at= 13 TeV and with an integrated luminosity of 140 fb− 1. The data are corrected for the effects of detector inefficiency and resolution and are compared to state-of-the-art Monte Carlo event generator predictions. The differential cross-sections are used to search for anomalous weak-boson self-interactions that are induced by dimension-six and dimension-eight operators in Standard Model effective field theory.

Observation of WZγ Production in pp Collisions at s= 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,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,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,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,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,Jan-Hendrik Arling,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

Physical review letters

Published Date

2024/1/12

This Letter reports the observation of W Z γ production and a measurement of its cross section using 140.1±1.2 fb− 1 of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The W Z γ production cross section, with both the W and Z bosons decaying leptonically, p p→ W Z γ→ ℓ′±ν ℓ+ ℓ− γ (ℓ (′)= e, μ), is measured in a fiducial phase-space region defined such that the leptons and the photon have high transverse momentum and the photon is isolated. The cross section is found to be 2.01±0.30 (stat)±0.16 (syst) fb. The corresponding standard model predicted cross section calculated at next-to-leading order in perturbative quantum chromodynamics and at leading order in the electroweak coupling constant is 1.50±0.06 fb. The observed significance of the W Z γ signal is 6.3 σ, compared with an expected significance of 5.0 σ.

Probing the CP nature of the top–Higgs Yukawa coupling in tt¯ H and tH events with H→ bb¯ decays using the ATLAS detector at the LHC

Authors

G Aad,B Abbott,DC Abbott,K Abeling,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,S Ahuja,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,C Amelung,CG Ames,D Amidei,SP Amor Dos 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,JF 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,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,D Bakshi Gupta,S Balaji,R Balasubramanian,EM Baldin,P Balek,E Ballabene

Journal

Physics Letters B

Published Date

2024/2/1

The CP properties of the coupling between the Higgs boson and the top quark are investigated using 139 fb− 1 of proton–proton collision data recorded by the ATLAS experiment at the LHC at a centre-of-mass energy of s= 13 TeV. The CP structure of the top quark–Higgs boson Yukawa coupling is probed in events with a Higgs boson decaying into a pair of b-quarks and produced in association with either a pair of top quarks, t t¯ H, or a single top quark, tH. Events containing one or two electrons or muons are used for the measurement. Multivariate techniques are used to select regions enriched in t t¯ H and tH events, where dedicated CP-sensitive observables are exploited. In an extension of the Standard Model (SM) with a CP-odd admixture in the top–Higgs Yukawa coupling, the mixing angle between CP-even and CP-odd couplings is measured to be α= 11− 73∘∘+ 52∘, compatible with the SM prediction …

A precise measurement of the Z-boson double-differential transverse momentum and rapidity distributions in the full phase space of the decay leptons with the ATLAS …

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,AC Abusleme Hoffman,BS Acharya,C Adam Bourdarios,L Adamczyk,L Adamek,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,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,A Alfonsi,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,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,DJA Antrim,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,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,K Assamagan,R Astalos,S Atashi,RJ Atkin,M Atkinson,NB Atlay,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

Journal

The European Physical Journal C

Published Date

2024/3/25

This paper presents for the first time a precise measurement of the production properties of the Z boson in the full phase space of the decay leptons. This is in contrast to the many previous precise unfolded measurements performed in the fiducial phase space of the decay leptons. The measurement is obtained from proton–proton collision data collected by the ATLAS experiment in 2012 at TeV at the LHC and corresponding to an integrated luminosity of 20.2 fb. The results, based on a total of 15.3 million Z-boson decays to electron and muon pairs, extend and improve a previous measurement of the full set of angular coefficients describing Z-boson decay. The double-differential cross-section distributions in Z-boson transverse momentum and rapidity are measured in the pole region, defined as GeV, over the range . The total uncertainty of the normalised cross-section measurements in the peak region of the …

Measurement of the tt¯ cross section and its ratio to the Z production cross section using pp collisions at s= 13.6 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,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,S Aktas,K Al Khoury,GL Alberghi,J Albert,P Albicocco,GL Albouy,S Alderweireldt,ZL Alegria,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,JF Arguin,S Argyropoulos,J-H 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,TM Baer,P Bagnaia,M Bahmani,D Bahner,AJ Bailey,VR Bailey,JT Baines,L Baines,OK Baker,E Bakos,D Bakshi Gupta

Journal

Physics Letters B

Published Date

2024/1/1

The inclusive top-quark-pair production cross section σ t t¯ and its ratio to the Z-boson production cross section have been measured in proton–proton collisions at s= 13.6 TeV, using 29 fb− 1 of data collected in 2022 with the ATLAS experiment at the Large Hadron Collider. Using events with an opposite-charge electron-muon pair and b-tagged jets, and assuming Standard Model decays, the top-quark-pair production cross section is measured to be σ t t¯= 850±3 (stat.)±18 (syst.)±20 (lumi.) pb. The ratio of the t t¯ and the Z-boson production cross sections is also measured, where the Z-boson contribution is determined for inclusive e+ e− and μ+ μ− events in a fiducial phase space. The relative uncertainty on the ratio is reduced compared to the t t¯ cross section, thanks to the cancellation of several systematic uncertainties. The result for the ratio, R t t¯/Z= 1.145±0.003 (stat.)±0.021 (syst.)±0.002 (lumi.) is consistent …

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

2024/1/11

The first evidence for the Higgs boson decay to a Z boson and a photon is presented, with a statistical significance of 3.4 standard deviations. The result is derived from a combined analysis of the searches performed by the ATLAS and CMS Collaborations with proton-proton collision datasets collected at the CERN Large Hadron Collider (LHC) from 2015 to 2018. These correspond to integrated luminosities of around 140 fb− 1 for each experiment, at a center-of-mass energy of 13 TeV. The measured signal yield is 2.2±0.7 times the standard model prediction, and agrees with the theoretical expectation within 1.9 standard deviations.

Search for non-resonant Higgs boson pair production in the final state in pp collisions at = 13 TeV with the ATLAS detector

Authors

Georges Aad,Brad Abbott,Dale Charles Abbott,A Abed Abud,Kira Abeling,Deshan Kavishka Abhayasinghe,Syed Haider Abidi,OS AbouZeid,Nadine L Abraham,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Baida Achkar,Shunsuke Adachi,Lennart Adam,C Adam Bourdarios,Leszek Adamczyk,Lukas Adamek,Jahred Adelman,Michael Adersberger,Aytul Adiguzel,Sofia Adorni,Tim Adye,AA Affolder,Yoav Afik,Christina Agapopoulou,Merve Nazlim Agaras,Anamika Aggarwal,Catalin Agheorghiesei,JA Aguilar-Saavedra,Faig Ahmadov,Waleed Syed Ahmed,Xiaocong Ai,Giulio Aielli,Shunichi Akatsuka,TPA Åkesson,Ece Akilli,AV Akimov,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,MJ Alconada Verzini,S Alderweireldt,Martin Aleksa,IN Aleksandrov,Calin Alexa,Didier Alexandre,Theodoros Alexopoulos,Alice Alfonsi,Fabrizio Alfonsi,Muhammad Alhroob,Babar Ali,Gianluca Alimonti,John Alison,Steven Patrick Alkire,Corentin Allaire,BMM Allbrooke,Benjamin William Allen,PP Allport,Alberto Aloisio,Alejandro Alonso,Francisco Alonso,Cristiano Alpigiani,Azzah Aziz Alshehri,M Alvarez Estevez,D Álvarez Piqueras,MG Alviggi,Y Amaral Coutinho,Alessandro Ambler,Luca Ambroz,Christoph Amelung,D Amidei,SP Amor Dos Santos,Simone Amoroso,Cherifa Sabrina Amrouche,Fenfen An,Christos Anastopoulos,Nansi Andari,Timothy Andeen,Christoph Falk Anders,John Kenneth Anders,Attilio Andreazza,V Andrei,Christopher Ryan Anelli,Stylianos Angelidakis,Aaron Angerami,AV Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Mario Antonelli,DJA Antrim,Fabio Anulli,Masato Aoki,JA Aparisi Pozo,L Aperio Bella,Giorgi Arabidze,JP Araque,V Araujo Ferraz,R Araujo Pereira,Chiara Arcangeletti,ATH Arce,Francisco Anuar Arduh,Jean-Francois Arguin,Spyridon Argyropoulos,J-H Arling,Aaron James Armbruster,Alexander Armstrong,Olivier Arnaez,Hannah Arnold,ZP Arrubarrena Tame,Andrei Artamonov,Giacomo Artoni,Sebastian Artz,Shoji Asai,Nedaa Asbah,Eleni Myrto Asimakopoulou,Lily Asquith,Jihad Assahsah,Ketevi Assamagan,Robert Astalos,Ryan Justin Atkin,Markus Atkinson,Naim Bora Atlay,Hicham Atmani,Kamil Augsten,Giuseppe Avolio,R Avramidou,Mohamad Kassem Ayoub,Adam Maxwell Azoulay,Georges Azuelos,Henri Bachacou,Konstantinos Bachas,Moritz Backes,Filip Backman,Paolo Bagnaia,Marzieh Bahmani,H Bahrasemani,AJ Bailey,Virginia Ruth Bailey,JT Baines,Milena Bajic,Christos Bakalis,OK Baker,Pepijn Johannes Bakker,D Bakshi Gupta,Shyam Balaji,EM Baldin,Petr Balek

Journal

Physics Letters B

Published Date

2020/2/10

A search for non-resonant Higgs boson pair production, as predicted by the Standard Model, is presented, where one of the Higgs bosons decays via the H→ b b channel and the other via one of the H→ W W⁎/Z Z⁎/τ τ channels. The analysis selection requires events to have at least two b-tagged jets and exactly two leptons (electrons or muons) with opposite electric charge in the final state. Candidate events consistent with Higgs boson pair production are selected using a multi-class neural network discriminant. The analysis uses 139 fb− 1 of pp collision data recorded at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. An observed (expected) upper limit of 1.2 (0.9− 0.3+ 0.4) pb is set on the non-resonant Higgs boson pair production cross-section at 95% confidence level, which is equivalent to 40 (29− 9+ 14) times the value predicted in the Standard Model.

Search for the decay of the Higgs boson to a Z boson and a light pseudoscalar particle decaying to two photons

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,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,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,OK Baker,E Bakos,D Bakshi Gupta,V Balakrishnan,R Balasubramanian,EM Baldin,P Balek,E Ballabene

Journal

Physics Letters B

Published Date

2024/2/21

A search for the decay of the Higgs boson to a Z boson and a light, pseudoscalar particle, a, decaying respectively to two leptons and to two photons is reported. The search uses the full LHC Run 2 proton–proton collision data at s= 13 TeV, corresponding to 139 fb− 1 collected by the ATLAS detector. This is one of the first searches for this specific decay mode of the Higgs boson, and it probes unexplored parameter space in models with axion-like particles (ALPs) and extended scalar sectors. The mass of the a particle is assumed to be in the range 0.1–33 GeV. The data are analysed in two categories: a merged category where the photons from the a decay are reconstructed in the ATLAS calorimeter as a single cluster, and a resolved category in which two separate photons are detected. The main background processes are from Standard Model Z boson production in association with photons or jets. The data are in …

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

Journal

Physics Letters B

Published Date

2024/1/1

Semi-visible jets, with a significant contribution to the event's missing transverse momentum, can arise in strongly interacting dark sectors. This results in an event topology where one of the jets can be aligned with the direction of the missing transverse momentum. The first search for semi-visible jets produced via a t-channel mediator exchange is presented. The analysis uses proton-proton collisions with an integrated luminosity of 139 fb−1 and a centre-of-mass energy of 13 TeV, collected with the ATLAS detector during the Run 2 of the LHC. No excess over Standard Model predictions is observed. Assuming a coupling strength of unity between the mediator, a Standard Model quark and a dark quark, mediator masses up to 2.7 TeV are excluded at the 95% confidence level. Upper limits on the coupling strength are also derived.

Inclusive and differential cross-section measurements of production in collisions at TeV with the ATLAS detector, including EFT and spin-correlation …

Authors

Aram Hayrapetyan,Robin Erbacher,Camilo Andres Carrillo Montoya,Dave M Newbold,Wagner Carvalho,Nimmitha Karunarathna,Maciej Górski,Manuel Sommerhalder,Cole Lindsey,Balazs Ujvari,Samila Muthumuni,Ayse Polatoz,Anna Tsatsos,Vinicius Massami Mikuni,Elton Shumka,Alfredo Gurrola,Anne-Marie Magnan,Roumyana Hadjiiska,Ian Laflotte,Ian Mcalister,Willard Johns,Ludivine Ceard,Pierre Van Hove,Mohammad Alhusseini,Alberto Orso Maria Iorio,Ulrich Heintz,Giuseppe Latino,Andrew Hart,Federico Vazzoler,Sinan Sagir,Changgi Huh,Georgios Tsipolitis,Joseph Lynn Dulemba,Sanghyun Ko,Dylan Apparu,Soureek Mitra,Sergei Slabospitskii,Shamik Ghosh,Maria Giulia Ratti,Michael Tytgat,Robert Schöfbeck,Julia Vazquez Escobar,James Hirschauer,Andreas Nürnberg,Ho Fung Tsoi,Francisco Yumiceva,Reza Goldouzian,Victor Golovtcov,Ram Krishna Dewanjee,Chiara Rovelli,Eliza Melo Da Costa,Daniele Fasanella,Polina Simkina,Vipin Bhatnagar,Zhen Hu,Hans Reithler,Austin Baty,Soumya Mukherjee,Tomas Lindén,Jonathon Langford,Graham Wilson,William Tabb,Furkan Dolek,Attilio Santocchia,Sergio Sánchez Navas,Manuel Calderon De La Barca Sanchez,Wolfram Dietrich Zeuner,Hesham El Faham,Jithin Madhusudanan Sreekala,Raphael Granier de Cassagnac,Georgios Daskalakis,Kin Ho Lo,Axel Buchot Perraguin,Andrés Abreu,Ernesto Migliore,Alexander Zotz,Tilman Rohe,Paul Schütze,Ece Asilar,Salvatore Nuzzo,Alexander Morton,Grace Cummings,Yasser Assran,Florian Joel J Bury,Gurkan Karaman,Henri Petrow,Jonathan Guiang,Kai-Feng Chen,Matthew Nguyen,Liam Brennan,Irene Dutta,Giorgio Apollinari,Michael Oshiro,Damir Lelas,Gillian Kopp,Michel Della Negra,Amitabh Lath,Dennis Roy,Alexander Pauls,Martijn Mulders,Fabrizio Palla,Nikolas Pervan,Lorenzo Uplegger,Marina Kolosova,Sunil Bansal,Roberval Walsh,Hugo Becerril Gonzalez,Vladimir Makarenko,Christopher Palmer,Kristan Allan Hahn,Tao Huang,Olmo Cerri,George Stephans,Siqi Yuan,Luiz Mundim,Olena Karacheban,Alicia Calderon,Zhaozhong Shi,Kevin Black,Thomas Kress,Georgia Karapostoli,Samuel Lascio,Fotios Ptochos,Berkan Kaynak,Wei Wei,Achille Petrilli,Diogo Bastos,Bhargav Madhusudan Joshi,Abhishikth Mallampalli,Chenfeng Lu,Maria Cepeda,Mauricio Thiel,Dylan Blend,Cécile Caillol,Yannik Rath,John Paul Chou,Nihar Ranjan Saha,Orgho Neogi,Mohammed Mahmoud,Peicho Petkov,John Rotter,Davide Piccolo,Emanuel Pfeffer,Florian Rehm,Pawel de Barbaro,Vaia Papadimitriou,Robert White,Nural Akchurin,Qianying Guo,Patrice Verdier

Published Date

2023/9/25

Measurements of inclusive and normalized differential cross sections of the associated production of top quark-antiquark and bottom quark-antiquark pairs, ttbb, are presented. The results are based on data from proton-proton collisions collected by the CMS detector at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 138 fb− 1. The cross sections are measured in the lepton+ jets decay channel of the top quark pair, using events containing exactly one isolated electron or muon and at least five jets. Measurements are made in four fiducial phase space regions, targeting different aspects of the ttbb process. Distributions are unfolded to the particle level through maximum likelihood fits, and compared with predictions from several event generators. The inclusive cross section measurements of this process in the fiducial phase space regions are the most precise to date. In most cases, the measured inclusive cross sections exceed the predictions with the chosen generator settings. The only exception is when using a particular choice of dynamic renormalization scale, µR= 12 ni= t, t, b, b m1/4

Search for pair production of squarks or gluinos decaying via sleptons or weak bosons in final states with two same-sign or three leptons 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,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,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,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,Olivier Arnaez,Hannah Arnold,ZP Arrubarrena Tame,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,K Assamagan,R Astalos,S Atashi,RJ Atkin,M Atkinson,NB Atlay,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

Journal

Journal of High Energy Physics

Published Date

2024/2

A search for pair production of squarks or gluinos decaying via sleptons or weak bosons is reported. The search targets a final state with exactly two leptons with same-sign electric charge or at least three leptons without any charge requirement. The analysed data set corresponds to an integrated luminosity of 139 fb− 1 of proton-proton collisions collected at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC. Multiple signal regions are defined, targeting several SUSY simplified models yielding the desired final states. A single control region is used to constrain the normalisation of the WZ+ jets background. No significant excess of events over the Standard Model expectation is observed. The results are interpreted in the context of several supersymmetric models featuring R-parity conservation or R-parity violation, yielding exclusion limits surpassing those from previous searches. In models …

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

Measurements of the differential production cross-sections of prompt and non-prompt and mesons with transverse momenta between 8 and 360 GeV and rapidity in the range are reported. Furthermore, measurements of the non-prompt fractions of and , and the prompt and non-prompt -to- production ratios, are presented. The analysis is performed using 140 fb of TeV pp collision data recorded by the ATLAS detector at the LHC during the years 2015–2018.

Measurement of branching fractions and direct asymmetries for and decays at Belle II

Authors

I Adachi,L Aggarwal,H Ahmed,H Aihara,N Akopov,A Aloisio,N Anh Ky,DM Asner,H Atmacan,T Aushev,V Aushev,M Aversano,V Babu,H Bae,S Bahinipati,P Bambade,Sw Banerjee,S Bansal,M Barrett,J Baudot,M Bauer,A Baur,A Beaubien,F Becherer,J Becker,PK Behera,JV Bennett,FU Bernlochner,V Bertacchi,M Bertemes,E Bertholet,M Bessner,S Bettarini,B Bhuyan,F Bianchi,T Bilka,D Biswas,A Bobrov,D Bodrov,A Bolz,A Bondar,J Borah,A Bozek,M Bračko,P Branchini,RA Briere,TE Browder,A Budano,S Bussino,M Campajola,L Cao,G Casarosa,C Cecchi,J Cerasoli,M-C Chang,P Chang,R Cheaib,P Cheema,V Chekelian,C Chen,BG Cheon,K Chilikin,K Chirapatpimol,H-E Cho,K Cho,S-J Cho,S-K Choi,S Choudhury,J Cochran,L Corona,LM Cremaldi,S Das,F Dattola,E De La Cruz-Burelo,SA De La Motte,G De Nardo,M De Nuccio,G De Pietro,R De Sangro,M Destefanis,S Dey,A De Yta-Hernandez,R Dhamija,A Di Canto,F Di Capua,J Dingfelder,Z Doležal,I Domínguez Jiménez,TV Dong,M Dorigo,K Dort,D Dossett,S Dreyer,S Dubey,G Dujany,P Ecker,M Eliachevitch,D Epifanov,P Feichtinger,T Ferber,D Ferlewicz,T Fillinger,C Finck,G Finocchiaro,A Fodor,F Forti,A Frey,BG Fulsom,A Gabrielli,E Ganiev,M Garcia-Hernandez,R Garg,A Garmash,G Gaudino,V Gaur,A Gaz,A Gellrich,G Ghevondyan,D Ghosh,H Ghumaryan,G Giakoustidis,R Giordano,A Giri,A Glazov,B Gobbo,R Godang,O Gogota,P Goldenzweig,P Grace,W Gradl,T Grammatico,S Granderath,E Graziani,D Greenwald,Z Gruberová,T Gu,Y Guan,K Gudkova,S Halder,Y Han,T Hara,K Hayasaka,H Hayashii,S Hazra,C Hearty,MT Hedges,A Heidelbach,I Heredia De La Cruz,M Hernández Villanueva,A Hershenhorn

Journal

Physical Review D

Published Date

2024/1/4

We report measurements of the branching fractions and direct C P asymmetries of the decays B 0→ K+ π−, B+→ K+ π 0, B+→ K 0 π+, and B 0→ K 0 π 0, and use these for testing the standard model through an isospin-based sum rule. In addition, we measure the branching fraction and direct C P asymmetry of the decay B+→ π+ π 0 and the branching fraction of the decay B 0→ π+ π−. The data are collected with the b elle II detector from e+ e− collisions at the ϒ (4 S) resonance produced by the SuperKEKB asymmetric-energy collider and contain 387× 10 6 bottom-antibottom meson pairs. Signal yields are determined in two-dimensional fits to background-discriminating variables, and range from 500 to 3900 decays, depending on the channel. We obtain− 0.03±0.13±0.04 for the sum rule in agreement with the standard model expectation of zero and with a precision comparable to the best existing determinations.

Search for pair-production of vector-like quarks in lepton+jets final states containing at least one -tagged jet using the Run 2 data from the ATLAS experiment

Authors

CMS collaboration

Journal

arXiv preprint arXiv:2209.07327

Published Date

2022/9/15

A search is presented for vector-like T and B quark-antiquark pairs produced in proton-proton collisions at a center-of-mass energy of 13 TeV. Data were collected by the CMS experiment at the CERN LHC in 2016-2018, with an integrated luminosity of 138 fb. Events are separated into single-lepton, same-sign charge dilepton, and multilepton channels. In the analysis of the single-lepton channel a multilayer neural network and jet identification techniques are employed to select signal events, while the same-sign dilepton and multilepton channels rely on the high-energy signature of the signal to distinguish it from standard model backgrounds. The data are consistent with standard model background predictions, and the production of vector-like quark pairs is excluded at 95% confidence level for T quark masses up to 1.54 TeV and B quark masses up to 1.56 TeV, depending on the branching fractions assumed, with maximal sensitivity to decay modes that include multiple top quarks. The limits obtained in this search are the strongest limits to date for production, excluding masses below 1.48 TeV for all decays to third generation quarks, and are the strongest limits to date for production with B quark decays to tW.

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.

Search for the Zγ decay mode of new high-mass resonances in pp collisions at s= 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,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,EM Baldin

Journal

Physics Letters B

Published Date

2024/1/1

This letter presents a search for narrow, high-mass resonances in the Zγ final state with the Z boson decaying into a pair of electrons or muons. The s= 13 TeV pp collision data were recorded by the ATLAS detector at the CERN Large Hadron Collider and have an integrated luminosity of 140 fb− 1. The data are found to be in agreement with the Standard Model background expectation. Upper limits are set on the resonance production cross section times the decay branching ratio into Zγ. For spin-0 resonances produced via gluon–gluon fusion, the observed limits at 95% confidence level vary between 65.5 fb and 0.6 fb, while for spin-2 resonances produced via gluon–gluon fusion (or quark–antiquark initial states) limits vary between 77.4 (76.1) fb and 0.6 (0.5) fb, for the mass range from 220 GeV to 3400 GeV.

The ATLAS Trigger System for LHC Run 3 and Trigger performance in 2022

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 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

Published Date

2024/1/15

The ATLAS trigger system is a crucial component of the ATLAS experiment at the LHC. It is responsible for selecting events in line with the ATLAS physics programme. This paper presents an overview of the changes to the trigger and data acquisition system during the second long shutdown of the LHC, and shows the performance of the trigger system and its components in the proton-proton collisions during the 2022 commissioning period as well as its expected performance in proton-proton and heavy-ion collisions for the remainder of the third LHC data-taking period (2022-2025).

Measurement of asymmetries in decays at Belle II

Authors

I Adachi,L Aggarwal,H Ahmed,H Aihara,N Akopov,A Aloisio,N Anh Ky,DM Asner,H Atmacan,T Aushev,V Aushev,M Aversano,V Babu,H Bae,S Bahinipati,P Bambade,Sw Banerjee,M Barrett,J Baudot,A Baur,A Beaubien,F Becherer,J Becker,JV Bennett,FU Bernlochner,V Bertacchi,M Bertemes,E Bertholet,M Bessner,S Bettarini,B Bhuyan,F Bianchi,T Bilka,S Bilokin,D Biswas,A Bobrov,D Bodrov,A Bolz,A Bondar,J Borah,A Bozek,M Bračko,P Branchini,RA Briere,TE Browder,A Budano,S Bussino,M Campajola,L Cao,G Casarosa,C Cecchi,J Cerasoli,M-C Chang,P Chang,P Cheema,C Chen,BG Cheon,K Chilikin,K Chirapatpimol,H-E Cho,K Cho,S-J Cho,S-K Choi,S Choudhury,L Corona,S Das,F Dattola,De La Cruz-Burelo,SA De La Motte,G De Nardo,M De Nuccio,G De Pietro,R de Sangro,M Destefanis,R Dhamija,A Di Canto,F Di Capua,J Dingfelder,Z Doležal,TV Dong,M Dorigo,K Dort,S Dreyer,S Dubey,G Dujany,P Ecker,M Eliachevitch,P Feichtinger,T Ferber,D Ferlewicz,T Fillinger,C Finck,G Finocchiaro,A Fodor,F Forti,A Frey,BG Fulsom,A Gabrielli,E Ganiev,M Garcia-Hernandez,R Garg,G Gaudino,V Gaur,A Gaz,A Gellrich,G Ghevondyan,D Ghosh,H Ghumaryan,G Giakoustidis,R Giordano,A Giri,B Gobbo,R Godang,O Gogota,P Goldenzweig,W Gradl,T Grammatico,E Graziani,D Greenwald,Z Gruberová,T Gu,Y Guan,K Gudkova,S Halder,Y Han,K Hara,T Hara,H Hayashii,S Hazra,C Hearty,MT Hedges,A Heidelbach,I Heredia de la Cruz,M Hernández Villanueva,T Higuchi,M Hoek,M Hohmann,P Horak,C-L Hsu,T Humair,T Iijima,N Ipsita,A Ishikawa,R Itoh,M Iwasaki,P Jackson,WW Jacobs,E-J Jang,QP Ji,S Jia

Journal

arXiv preprint arXiv:2402.03713

Published Date

2024/2/6

We describe a measurement of charge-parity () violation asymmetries in decays using Belle II data. We consider and decays. The data were collected at the SuperKEKB asymmetric-energy collider between the years 2019 and 2022, and contain bottom-antibottom meson pairs. We reconstruct signal decays and extract the violating parameters from a fit to the distribution of the proper-decay-time difference between the two mesons. The measured direct and mixing-induced asymmetries are and , respectively, where the first uncertainties are statistical and the second are systematic. These results are in agreement with current world averages and standard model predictions.

Search for heavy Majorana or Dirac neutrinos and right-handed W gauge bosons in final states with charged leptons and jets in pp collisions at TeV with …

Authors

ATLAS collaboration

Journal

arXiv preprint arXiv:2304.09553

Published Date

2023/4/19

A search for heavy right-handed Majorana or Dirac neutrinos and heavy right-handed gauge bosons is performed in events with energetic electrons or muons, with the same or opposite electric charge, and energetic jets. The search is carried out separately for topologies of clearly separated final-state products (``resolved'' channel) and topologies with boosted final states with hadronic products partially overlapping and reconstructed as a large-radius jet (``boosted'' channel). The events are selected from collision data at the LHC with an integrated luminosity of 139 fb collected by the ATLAS detector at = 13 TeV. No significant deviations from the Standard Model predictions are observed. The results are interpreted within the theoretical framework of a left-right symmetric model, and lower limits are set on masses in the heavy right-handed boson and plane. The excluded region extends to about TeV for both Majorana and Dirac neutrinos at TeV. with masses of less than 3.5 (3.6) TeV are excluded in the electron (muon) channel at TeV for the Majorana neutrinos, and limits of up to 3.6 TeV for () TeV in the electron (muon) channel are set for the Dirac neutrinos.

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 …

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