Measurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS

The ATLAS collaboration

doi:10.1016/j.physletb.2018.12.023

Measurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS

The ATLAS collaboration

University Mohammed I
Aix-Marseille University - CNRS
University of Oklahoma
Azerbaijan Academy of Sciences
Laboratoire de l'Accélérateur Linéaire
University of London
University of Toronto
Niels Bohr Institutet
University of Sussex
Tel Aviv University
Technion - Israel Institute of Technology
Argonne National Laboratory
INFN- Sezione di Trieste
ICTP
University of Tokyo
Univ of Mining and Metallurgy
USA
University of Munich
Bogazici University
Rutherford Appleton Laboratory
University of California at Santa Cruz
'Al. I. Cuza' University
LIP - Lisboa
University of Granada
Joint Inst. for Nuclear Research
INFN Sezione di Roma Tor Vergata
University of Rome Tor Vergata
Kyoto University
Lund University
University of Geneva
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
DIBINEM, Alma Mater Studiorum, University of Bologna
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
University of Victoria
INFN, Laboratori Nazionali Di Frascati
Universidad Nacional de la Plata
Radboud University Nijmegen
European Organization for Nuclear Research
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
Czech Technical University in Prague
INFN Sezione di Milano
University of Chicago
University of Washington
University of Oregon
University of Birmingham
INFN Sezione di Napoli
Università di Napoli Federico II
New York University
University of Sheffield
University of Glasgow
University of Valencia
University of California at Berkeley
Federal University of Rio de Janeiro
University of Oxford
Brandeis University
University of Michigan, Ann Arbor
Coimbra University Pó lo II
Deutsches Elektronen-Synchrotron (DESY)
University Paris-Sud
University of Texas at Austin
Heidelberg University
University of Bern
University of Milan
LAIC, Université d'Auvergne
University of Amsterdam
Columbia University
Budker Institute of Nuclear Physics (SB RAS)
Novosibirsk State University
SNS and INFN
University of California, Irvine
Sezione INFN di Roma La Sapienza
High Energy Accelerator Research Organization (KEK)
Michigan State University
Duke University
Université de Montréal
Iowa University
Queen Mary University of London
University of Cambridge
University of Bonn
ITEP
Johannes Gutenberg University
Broad Institute of Harvard University
Uppsala University
Brookhaven National Laboratory
Comenius University
University of Cape Town
University of Illinois at Urbana-Champaign
University of Siegen
University of Science and Technology of China
Institute of High Energy Physics Chinese Academy of Science
Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
University of Salento
Universita La Sapienza
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
Simon Fraser University
Yale University
Louisiana Tech University
Weizmann Institute of Science Israel
University of Pennsylvania School of Arts and Sciences
University of Wisconsin-Madison
Bergische Universität Wuppertal
University of Melbourne
University of Genova
Sezione INFN di Genova
Max-Planck-Institut für Physik
Stanford University
Shanghai Jiao Tong University
Universidad Autónoma de Madrid
Department of Physics, Lancaster University
National Research Centre "Kurchatov Institute"
University Mohammed V in Rabat
Ohio State University
Centre de Recherche Institut du Cerveau et de la Moelle
Tufts University
Georg August Universität Göttingen
University of Freiburg
University of Gaziantep
Bahcesehir University
SUNY
University College London
Carleton University
University of Athens
National Research Nuclear University MEPhI
Hassan II University of Casablanca
University of Grenoble Alpes
University of Arizona
University of Massachusetts Amherst
Stockholm University
Oskar Klein Centre
University of Manchester
University of Pittsburgh
Humboldt-Universität zu Berlin
University of Pisa
Technische Universität Dresden
Boston University
Pontificia Universidad Católica de Chile
Moscow State University
Institute for High Energy Physics (IHEP)
Dept. d'Estructura I Constituents De La Matèria and IFAE
University of Buenos Aires
University of Johannesburg
University of Texas at Arlington
Tokyo Metropolitan University
Universidad Técnica Federico Santa María
Institute of Experimental Physics Slovak Academy of Sciences
University of Bergen
University of Oslo
University of Liverpool
pro3dure medical GmbH
Academia Sinica Taipei
University at Albany
Ankara University School of Medicine
Indiana University Bloomington
Universite della Calabria
Oklahoma State University
Charles University
PT Government Associated Laboratory, University of Minho
Istanbul Bilgi University
Sez. di Roma Tre
Universidade Federal de Juiz de Fora
Chinese University of Hong Kong
Tbilisi State University
TRIUMF
Iowa State University
Nanjing University
Tsinghua University
Kobe University
University of Chinese Academy of Sciences
National Tsing Hua University
Aristotle University of Thessaloniki
Institute of Physics of the Czech Academy of Sciences
McGill University and Génome Québec Innovation Centre
Palacky University
Univ. of Ljubljana
University of Edinburgh
Univ.́ degli Studi di Udine
University of Lisboa
University of British Columbia
Shandong University
University of Alberta
Federal University of São João Del Rei
University of São Paulo
Justus-Liebig-Universität Gießen
University of Adelaide
Faculté Des Sciences-Semlalia
University of Warwick
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
University of Pavia
Southern Methodist University
INFN-TIFPA
University of Trento
Nagasaki Institute of Applied Science
Centro de Física Nuclear Universidade de Lisboa
West University in Timisoara
University of New Mexico
Tsukuba University
A.I. Alikhanyan National Science Laboratory (YerPhi)
University of Würzburg
Natl. Academy of Sciences of Belarus
Shinshu University
University of the Witwatersrand, Johannesburg
Osaka University
Nagoya University
Institute for Nuclear Problems of the Belarus State University
Tokyo Institute of Technology
University of Texas at Dallas
Medical University Innsbruck
Javakhishvili Tbilisi State University
Waseda University
York University
Center for Autonomous Systems
Kyushu University
Tomsk State University
University of Belgrade
Istanbul Aydin University (IAU)
Hong Kong University of Science and Technology
University of Sydney
University of Hong Kong
Universidad Antonio Nariño
Hiroshima Institute of Technology
Okayama University
Jagiellonian University
National Institute for R&D of Isotopic and Molecular Technologies
CNRS/IN2P3 and Université Paris 11
TOBB University of Economics and Technology
Kyoto University of Education
Transilvania University of Brasov

Research output: Contribution to journal › Article › peer-review

58 Scopus citations

Abstract

Jets created in association with a photon can be used as a calibrated probe to study energy loss in the medium created in nuclear collisions. Measurements of the transverse momentum balance between isolated photons and inclusive jets are presented using integrated luminosities of 0.49 nb⁻¹ of Pb + Pb collision data at s_NN=5.02 TeV and 25 pb⁻¹ of pp collision data at s=5.02 TeV recorded with the ATLAS detector at the LHC. Photons with transverse momentum 63.1<p_T ^γ<200 GeV and |η^γ|<2.37 are paired with all jets in the event that have p_T ^jet>31.6 GeV and pseudorapidity |η^jet|<2.8. The transverse momentum balance given by the jet-to-photon p_T ratio, x_Jγ, is measured for pairs with azimuthal opening angle Δϕ>7π/8. Distributions of the per-photon jet yield as a function of x_Jγ, (1/N_γ)(dN/dx_Jγ), are corrected for detector effects via a two-dimensional unfolding procedure and reported at the particle level. In pp collisions, the distributions are well described by Monte Carlo event generators. In Pb + Pb collisions, the x_Jγ distribution is modified from that observed in pp collisions with increasing centrality, consistent with the picture of parton energy loss in the hot nuclear medium. The data are compared with a suite of energy-loss models and calculations.

Original language	English
Pages (from-to)	167-190
Number of pages	24
Journal	Physics Letters B
Volume	789
DOIs	https://doi.org/10.1016/j.physletb.2018.12.023
State	Published - 10 Feb 2019
Externally published	Yes

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10.1016/j.physletb.2018.12.023

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@article{0bd4a7da0e3b4df5955fdaef730267f2,

title = "Measurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS",

abstract = "Jets created in association with a photon can be used as a calibrated probe to study energy loss in the medium created in nuclear collisions. Measurements of the transverse momentum balance between isolated photons and inclusive jets are presented using integrated luminosities of 0.49 nb−1 of Pb + Pb collision data at sNN=5.02 TeV and 25 pb−1 of pp collision data at s=5.02 TeV recorded with the ATLAS detector at the LHC. Photons with transverse momentum 63.1T γ<200 GeV and |ηγ|<2.37 are paired with all jets in the event that have pT jet>31.6 GeV and pseudorapidity |ηjet|<2.8. The transverse momentum balance given by the jet-to-photon pT ratio, xJγ, is measured for pairs with azimuthal opening angle Δϕ>7π/8. Distributions of the per-photon jet yield as a function of xJγ, (1/Nγ)(dN/dxJγ), are corrected for detector effects via a two-dimensional unfolding procedure and reported at the particle level. In pp collisions, the distributions are well described by Monte Carlo event generators. In Pb + Pb collisions, the xJγ distribution is modified from that observed in pp collisions with increasing centrality, consistent with the picture of parton energy loss in the hot nuclear medium. The data are compared with a suite of energy-loss models and calculations.",

author = "\{The ATLAS collaboration\} and M. Aaboud and G. Aad and B. Abbott and O. Abdinov and B. Abeloos and Abhayasinghe, \{D. K.\} and Abidi, \{S. H.\} and AbouZeid, \{O. S.\} and Abraham, \{N. L.\} and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and S. Adachi and L. Adamczyk and J. Adelman and M. Adersberger and A. Adiguzel and T. Adye and Affolder, \{A. A.\} and Y. Afik and C. Agheorghiesei and Aguilar-Saavedra, \{J. A.\} and F. Ahmadov and G. Aielli and S. Akatsuka and {\AA}kesson, \{T. P.A.\} and E. Akilli and Akimov, \{A. V.\} and Alberghi, \{G. L.\} and J. Albert and P. Albicocco and \{Alconada Verzini\}, \{M. J.\} and S. Alderweireldt and M. Aleksa and Aleksandrov, \{I. N.\} and C. Alexa and T. Alexopoulos and M. Alhroob and B. Ali and G. Alimonti and J. Alison and Alkire, \{S. P.\} and C. Allaire and Allbrooke, \{B. M.M.\} and Allen, \{B. W.\} and Allport, \{P. P.\} and A. Aloisio and L. Heinrich and E. Kourlitis",

note = "Publisher Copyright: {\textcopyright} 2018 The Author(s)",

year = "2019",

month = feb,

day = "10",

doi = "10.1016/j.physletb.2018.12.023",

language = "English",

volume = "789",

pages = "167--190",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Measurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS

AU - The ATLAS collaboration

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abdinov, O.

AU - Abeloos, B.

AU - Abhayasinghe, D. K.

AU - Abidi, S. H.

AU - AbouZeid, O. S.

AU - Abraham, N. L.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adachi, S.

AU - Adamczyk, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akatsuka, S.

AU - Åkesson, T. P.A.

AU - Akilli, E.

AU - Akimov, A. V.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albicocco, P.

AU - Alconada Verzini, M. J.

AU - Alderweireldt, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alexa, C.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Ali, B.

AU - Alimonti, G.

AU - Alison, J.

AU - Alkire, S. P.

AU - Allaire, C.

AU - Allbrooke, B. M.M.

AU - Allen, B. W.

AU - Allport, P. P.

AU - Aloisio, A.

AU - Heinrich, L.

AU - Kourlitis, E.

PY - 2019/2/10

Y1 - 2019/2/10

N2 - Jets created in association with a photon can be used as a calibrated probe to study energy loss in the medium created in nuclear collisions. Measurements of the transverse momentum balance between isolated photons and inclusive jets are presented using integrated luminosities of 0.49 nb−1 of Pb + Pb collision data at sNN=5.02 TeV and 25 pb−1 of pp collision data at s=5.02 TeV recorded with the ATLAS detector at the LHC. Photons with transverse momentum 63.1T γ<200 GeV and |ηγ|<2.37 are paired with all jets in the event that have pT jet>31.6 GeV and pseudorapidity |ηjet|<2.8. The transverse momentum balance given by the jet-to-photon pT ratio, xJγ, is measured for pairs with azimuthal opening angle Δϕ>7π/8. Distributions of the per-photon jet yield as a function of xJγ, (1/Nγ)(dN/dxJγ), are corrected for detector effects via a two-dimensional unfolding procedure and reported at the particle level. In pp collisions, the distributions are well described by Monte Carlo event generators. In Pb + Pb collisions, the xJγ distribution is modified from that observed in pp collisions with increasing centrality, consistent with the picture of parton energy loss in the hot nuclear medium. The data are compared with a suite of energy-loss models and calculations.

AB - Jets created in association with a photon can be used as a calibrated probe to study energy loss in the medium created in nuclear collisions. Measurements of the transverse momentum balance between isolated photons and inclusive jets are presented using integrated luminosities of 0.49 nb−1 of Pb + Pb collision data at sNN=5.02 TeV and 25 pb−1 of pp collision data at s=5.02 TeV recorded with the ATLAS detector at the LHC. Photons with transverse momentum 63.1T γ<200 GeV and |ηγ|<2.37 are paired with all jets in the event that have pT jet>31.6 GeV and pseudorapidity |ηjet|<2.8. The transverse momentum balance given by the jet-to-photon pT ratio, xJγ, is measured for pairs with azimuthal opening angle Δϕ>7π/8. Distributions of the per-photon jet yield as a function of xJγ, (1/Nγ)(dN/dxJγ), are corrected for detector effects via a two-dimensional unfolding procedure and reported at the particle level. In pp collisions, the distributions are well described by Monte Carlo event generators. In Pb + Pb collisions, the xJγ distribution is modified from that observed in pp collisions with increasing centrality, consistent with the picture of parton energy loss in the hot nuclear medium. The data are compared with a suite of energy-loss models and calculations.

UR - https://www.scopus.com/pages/publications/85058927090

U2 - 10.1016/j.physletb.2018.12.023

DO - 10.1016/j.physletb.2018.12.023

M3 - Article

AN - SCOPUS:85058927090

SN - 0370-2693

VL - 789

SP - 167

EP - 190

JO - Physics Letters B

JF - Physics Letters B

ER -

Measurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS

Abstract

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