Measurement of jet fragmentation in Pb+Pb and pp collisions at sNN =5.02 TeV with the ATLAS detector

ATLAS Collaboration

doi:10.1103/PhysRevC.98.024908

Measurement of jet fragmentation in Pb+Pb and pp collisions at sNN =5.02 TeV with the ATLAS detector

ATLAS Collaboration

Mohamed I University
Aix-Marseille Université
University of Oklahoma
Azerbaijan National Academy of Sciences
Université Paris-Saclay
Royal Holloway University of London
University of Toronto
University of Copenhagen
University of Sussex
Tel Aviv University
Technion-Israel Institute of Technology
Argonne National Laboratory
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
King's College London
The University of Tokyo
AGH University of Science and Technology
Northern Illinois University
Ludwig Maximilian University of Munich
Bogazici University
Istanbul University
Rutherford Appleton Laboratory
University of California at Santa Cruz
Alexandru Ioan Cuza University of Iaşi
Laboratório de Instrumentação e Física Experimental de Partículas
University of Granada
NOVA University Lisbon
Joint Institute for Nuclear Research
University of Rome Tor Vergata
Kyoto University
Lund University
University of Geneva
RAS - P.N. Lebedev Physics Institute
University of Bologna
University of Victoria BC
Universidad Nacional de La Plata
Radboud University Nijmegen
CERN
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
Czech Technical University in Prague
The University of Chicago
University of Washington
University of Oregon
University of Birmingham
Council for Scientific and Industrial Research
University of Naples Federico II
University of Glasgow
University of Valencia
University of California at Berkeley
Universidade Federal do Rio de Janeiro
University of Oxford
Brandeis University
University of Michigan, Ann Arbor
University of Coimbra
German Electron Synchrotron
University of Sheffield
University of Texas at Austin
Heidelberg University
University of Bern
University of Milan
Université Clermont Auvergne
University of Amsterdam
Columbia University
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
University of California at Irvine
High Energy Accelerator Research Organization, Tsukuba
Michigan State University
Duke University
University of Montreal
University of Iowa
Queen Mary University of London
University of Cambridge
University of Bonn
Alikhanov Institute for Theoretical and Experimental Physics
Johannes Gutenberg University Mainz
Uppsala University
United States Department of Energy
Comenius University
University of Cape Town
University of Illinois
University of Siegen
University of Science and Technology of China
CAS - Institute of High Energy Physics
TRIUMF
Université Paris-Saclay
University of Salento
University of Rome La Sapienza
Cracow
Simon Fraser University
Yale University
Louisiana Tech University
Weizmann Institute of Science
University of Pennsylvania School of Arts and Sciences
University of Wisconsin-Madison
University of Louisville
University of Wuppertal
University of Melbourne
University of Genoa
Max Planck Institute for Physics (Werner Heisenberg Institute)
SLAC National Accelerator Laboratory
Shanghai Jiao Tong University
Universidad Autónoma de Madrid
Lancaster University
Russian Research Centre Kurchatov Institute
Mohammed V University in Rabat
California State University Fresno
Ohio State University
Sorbonne Université
Tufts University
University of Göttingen
University of Fribourg
University of Freiburg
Gaziantep University
Bahcesehir University
Stony Brook University
University College London
Carleton University
National and Kapodistrian University of Athens
Moscow Engineering Physics Institute
University of Hassan II Casablanca
National Center for Energy, Nuclear Science and Technology
Université Grenoble Alpes
University of Arizona
University of Massachusetts
Stockholm University
Oskar Klein Centre
University of Manchester
University of Pittsburgh
Humboldt University of Berlin
University of Pisa
Technische Universität Dresden
Boston University
Pontificia Universidad Católica de Chile
Lomonosov Moscow State University
Institute for High Energy Physics
The University of Hong Kong
Hong Kong University of Science and Technology
Institute for High Energy Physics
Universidad de Buenos Aires
University of Texas at Arlington
Tokyo Metropolitan University
Universidad Técnica Federico Santa Maria
Slovak Academy of Sciences
University of Bergen
University of Oslo
University of Liverpool
TU Dortmund University
Academia Sinica - Institute of Physics
SUNY Albany
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Indiana University Bloomington
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Oklahoma State University
Charles University
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Autonomous University of Barcelona
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Istanbul Bilgi University
Roma Tre University
Universidade Federal de Juiz de Fora
Harvard University
Chinese University of Hong Kong
Tomsk State University
Iowa State University
Nanjing University
Tsinghua University
The Collaborative Innovation Center of Quantum Matter (CICQM)
Kobe University
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National Tsing Hua University
Aristotle University of Thessaloniki
Czech Academy of Sciences
McGill University
Palacký University Olomouc
University of Ljubljana
University of Edinburgh
University of Udine
University of Lisbon
University of Naples Parthenope
University of British Columbia
Institute of Particle Physics
New York University
Shandong University
University of Alberta
Tbilisi State University
Universidade Federal de São João del-Rei
Universidade de São Paulo
Justus Liebig University Giessen
University of Adelaide
Cadi Ayyad University
University of Warwick
University of Pavia
Peter the Great St. Petersburg Polytechnic University
Southern Methodist University
City University of New York
Nagasaki Institute of Applied Science
University of the Aegean
West University of Timisoara
ICREA
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University of Tsukuba
A. Alikhanian Yerevan Institute of Physics
University of Würzburg
Osaka University
Belarus Academy of Sciences
Shinshu University
University of the Witwatersrand
Nagoya University
Belarusian State University
Tokyo Institute of Technology
Near East University
INFN-TIFPA
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University of Texas at Dallas
University of Innsbruck
Georgian National Academy of Sciences
Ilia State University
Waseda University
York University
KTH Royal Institute of Technology
Kyushu University
Manhattan College
University of Belgrade
Istanbul Aydin University
Hellenic Open University
University of Sydney
Universidad Antonio Nariño
California State University Sacramento
Moscow Institute of Physics and Technology
Hiroshima Institute of Technology
Okayama University
Jagiellonian University in Kraków
National Institute for Research and Development of Isotopic and Molecular Technologies
University Politehnica of Bucharest
IN2P3 - Institut National de Physique Nucléaire et de Physique Des Particules
Sun Yat-Sen University
University of Sharjah
TOBB University of Economics and Technology
University of Hamburg
Kyoto University of Education
Wigner Research Centre for Physics
Transilvania University of Brasov
Giresun Universitesi

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Abstract

This paper presents a measurement of jet fragmentation functions in 0.49 nb-1 of Pb+Pb collisions and 25 pb-1 of pp collisions at sNN=5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

Original language	English
Article number	024908
Journal	Physical Review C
Volume	98
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.98.024908
Publication status	Published - 16 Aug 2018

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.98.024908

Cite this

@article{98cac0215ff34f8cb12b535985f28f56,

title = "Measurement of jet fragmentation in Pb+Pb and pp collisions at sNN =5.02 TeV with the ATLAS detector",

abstract = "This paper presents a measurement of jet fragmentation functions in 0.49 nb-1 of Pb+Pb collisions and 25 pb-1 of pp collisions at sNN=5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.",

author = "\{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 Connell, \{S. H.\} and N. Govender and L. Truong",

note = "Publisher Copyright: {\textcopyright}2018 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",

year = "2018",

month = aug,

day = "16",

doi = "10.1103/PhysRevC.98.024908",

language = "English",

volume = "98",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "2",

}

TY - JOUR

T1 - Measurement of jet fragmentation in Pb+Pb and pp collisions at sNN =5.02 TeV with the ATLAS detector

AU - 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 - Connell, S. H.

AU - Govender, N.

AU - Truong, L.

N1 - Publisher Copyright: ©2018 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

PY - 2018/8/16

Y1 - 2018/8/16

N2 - This paper presents a measurement of jet fragmentation functions in 0.49 nb-1 of Pb+Pb collisions and 25 pb-1 of pp collisions at sNN=5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

AB - This paper presents a measurement of jet fragmentation functions in 0.49 nb-1 of Pb+Pb collisions and 25 pb-1 of pp collisions at sNN=5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

UR - https://www.scopus.com/pages/publications/85052533784

U2 - 10.1103/PhysRevC.98.024908

DO - 10.1103/PhysRevC.98.024908

M3 - Article

AN - SCOPUS:85052533784

SN - 2469-9985

VL - 98

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 024908

ER -

Measurement of jet fragmentation in Pb+Pb and pp collisions at sNN =5.02 TeV with the ATLAS detector

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