First measurement of jet mass in Pb–Pb and p–Pb collisions at the LHC

ALICE Collaboration

doi:10.1016/j.physletb.2017.11.044

First measurement of jet mass in Pb–Pb and p–Pb collisions at the LHC

ALICE Collaboration

Chair of Experimentalphysik - Dense and Strange Hadronic Matter

VECC Kolkata
Nuclear Physics Institute of the Cas
Panjab University
European Organization for Nuclear Research
Politecnico di Torino
The Indian Institute of Technology Bombay
Aligarh Muslim University
Korea Institute of Science and Technology Information
Yale University
ITEP
University of Campinas
National Research Centre "Kurchatov Institute"
INFN Sez. di Torino
University of Birmingham
Universidad Nacional Autónoma de México
Centro Fermi
DIBINEM, Alma Mater Studiorum, University of Bologna
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
Bogolyubov Institute for Theoretical Physics Nasu
University of Bergen
Frankfurt Institute for Advanced Studies
University of St. Petersburg
University of São Paulo
Central China Normal University
Horia Hulubei National Institute of Physics and Nuclear Engineering
GSI Helmholtz Center
Heidelberg University
Creighton University
Rudjer Boskovic Institute
Dipartimento di Fisica 'G. Galilei' and INFN
University of Houston
l'institut du thorax
Johann Wolfgang Goethe University
Cluster of Excellence E-conversion
Technical University of Munich
University of Oslo
Laboratori Nazionali Del Sud
Konkuk University
University of Jammu
University Paris-Sud
Rheinische Friedrich-Wilhelms-Universität Bonn
Institute of Physics Bhubaneswar
Università di Catania
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
Hungarian Academy of Sciences
LAIC, Université d'Auvergne
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
University of Münster
Joint Inst. for Nuclear Research
Niels Bohr Institutet
Inha University
Universite de Strasbourg
Benemerita Universidad Autonoma de Puebla
Universidad Autonoma de Sinaloa
National Research Nuclear University MEPhI
Petersburg Nuclear Phys. Inst.
the University of Utrecht
University of Tennessee
Gauhati University
INFN, Laboratori Nazionali Di Frascati
Wayne State University
Czech Technical University in Prague
Bose Institute
University of Texas at Austin
University of Pavia
Lawrence Berkeley National Laboratory
P. J. Safarik University
University of Brescia
Pusan National University
University of Liverpool
Purdue University
University of Helsinki and Helsinki Institute of Physics
Russian Federal Nuclear Center (VNIIEF)
Stefan Meyer Institut für Subatomare Physik (SMI)
Instituto de Ciencias Nucleares de la UNAM
Tsukuba University
National Research Foundation
COMSATS University Islamabad
Ohio State University
Technical University of Košice
Pontifical Catholic University of Peru San Miguel
INFN- Sezione di Trieste
University of Cagliari
Sezione INFN di Cagliari
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
University of Jyväskylä
Saha Institute of Nuclear Physics
Université Claude Bernard Lyon 1
Science Park 105
Lund University
University of Cape Town
Institute of Experimental Physics Slovak Academy of Sciences
University of Grenoble Alpes
Department of Physics
Oak Ridge National Laboratory
University of Eastern Piedmont
UFABC
Institute of Space Sciences
National Institute of Science Education and Research
Indian Institute of Technology Indore
Sezione INFN di Roma La Sapienza
National Center for Nuclear Research (NCBJ)
CIEMAT Energy Department
University of Zagreb
Institute for High Energy Physics (IHEP)
Universidad de Santiago de Compostela
Institute for Nuclear Research of the Russian Academy of Sciences
National and Kapodistrian University of Athens
Chicago State University
UFRGS
University of Split
Warsaw Institute of Technology
A.I. Alikhanyan National Science Laboratory (YerPhi)
University of Tokyo
Nagasaki Institute of Applied Science
Bergen University College
CINVESTAV
University of Tübingen
Institute of Physics of the Czech Academy of Sciences
Sejong University
Yonsei University
KTO Karatay University
Fachhochschule Worms
Gangneung-Wonju National University
California Polytechnic State University, San Luis Obispo
Suranaree University of Technology
University of South-Eastern Norway
STFC Daresbury Laboratory
China Institute of Atomic Energy
Moscow State University
University of the Witwatersrand, Johannesburg
Dipartimento di Fisica
Comenius University
Hiroshima University
Budker Institute of Nuclear Physics (SB RAS)
University of Rajasthan
Laboratori Nazionali di Legnaro
National Nuclear Research Center
Indonesian Institute of Sciences

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Abstract

This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at s_NN=2.76 TeV and s_NN=5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the hot Quantum Chromodynamics (QCD) matter created in nuclear collisions at collider energies. Jets are reconstructed from charged particles using the anti-k_T jet algorithm and resolution parameter R=0.4. The jets are measured in the pseudorapidity range |η_jet|<0.5 and in three intervals of transverse momentum between 60 GeV/c and 120 GeV/c. The measurement of the jet mass in central Pb–Pb collisions is compared to the jet mass as measured in p–Pb reference collisions, to vacuum event generators, and to models including jet quenching. It is observed that the jet mass in central Pb–Pb collisions is consistent within uncertainties with p–Pb reference measurements. Furthermore, the measured jet mass in Pb–Pb collisions is not reproduced by the quenching models considered in this letter and is found to be consistent with PYTHIA expectations within systematic uncertainties.

Original language	English
Pages (from-to)	249-264
Number of pages	16
Journal	Physics Letters B
Volume	776
DOIs	https://doi.org/10.1016/j.physletb.2017.11.044
State	Published - 10 Jan 2018

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10.1016/j.physletb.2017.11.044

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@article{4fdd5e823b4a4c3d9dbac1b33e9f44fb,

title = "First measurement of jet mass in Pb–Pb and p–Pb collisions at the LHC",

abstract = "This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at sNN=2.76 TeV and sNN=5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the hot Quantum Chromodynamics (QCD) matter created in nuclear collisions at collider energies. Jets are reconstructed from charged particles using the anti-kT jet algorithm and resolution parameter R=0.4. The jets are measured in the pseudorapidity range |ηjet|<0.5 and in three intervals of transverse momentum between 60 GeV/c and 120 GeV/c. The measurement of the jet mass in central Pb–Pb collisions is compared to the jet mass as measured in p–Pb reference collisions, to vacuum event generators, and to models including jet quenching. It is observed that the jet mass in central Pb–Pb collisions is consistent within uncertainties with p–Pb reference measurements. Furthermore, the measured jet mass in Pb–Pb collisions is not reproduced by the quenching models considered in this letter and is found to be consistent with PYTHIA expectations within systematic uncertainties.",

author = "\{ALICE Collaboration\} and S. Acharya and D. Adamov{\'a} and Aggarwal, \{M. M.\} and \{Aglieri Rinella\}, G. and M. Agnello and N. Agrawal and Z. Ahammed and N. Ahmad and Ahn, \{S. U.\} and S. Aiola and A. Akindinov and Alam, \{S. N.\} and Albuquerque, \{D. S.D.\} and D. Aleksandrov and B. Alessandro and D. Alexandre and \{Alfaro Molina\}, R. and A. Alici and A. Alkin and J. Alme and T. Alt and I. Altsybeev and \{Alves Garcia Prado\}, C. and M. An and C. Andrei and Andrews, \{H. A.\} and A. Andronic and V. Anguelov and C. Anson and T. Anti{\v c}i{\'c} and F. Antinori and P. Antonioli and R. Anwar and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and R. Arnaldi and Arnold, \{O. W.\} and Arsene, \{I. C.\} and M. Arslandok and B. Audurier and A. Augustinus and R. Averbeck and Azmi, \{M. D.\} and A. Badal{\`a} and Baek, \{Y. W.\} and S. Bagnasco and R. Bailhache and R. Bala and L. Fabbietti",

note = "Publisher Copyright: {\textcopyright} 2017 The Author",

year = "2018",

month = jan,

day = "10",

doi = "10.1016/j.physletb.2017.11.044",

language = "English",

volume = "776",

pages = "249--264",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - First measurement of jet mass in Pb–Pb and p–Pb collisions at the LHC

AU - ALICE Collaboration

AU - Acharya, S.

AU - Adamová, D.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, N.

AU - Ahn, S. U.

AU - Aiola, S.

AU - Akindinov, A.

AU - Alam, S. N.

AU - Albuquerque, D. S.D.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alexandre, D.

AU - Alfaro Molina, R.

AU - Alici, A.

AU - Alkin, A.

AU - Alme, J.

AU - Alt, T.

AU - Altsybeev, I.

AU - Alves Garcia Prado, C.

AU - An, M.

AU - Andrei, C.

AU - Andrews, H. A.

AU - Andronic, A.

AU - Anguelov, V.

AU - Anson, C.

AU - Antičić, T.

AU - Antinori, F.

AU - Antonioli, P.

AU - Anwar, R.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arnold, O. W.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Audurier, B.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Azmi, M. D.

AU - Badalà, A.

AU - Baek, Y. W.

AU - Bagnasco, S.

AU - Bailhache, R.

AU - Bala, R.

AU - Fabbietti, L.

PY - 2018/1/10

Y1 - 2018/1/10

N2 - This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at sNN=2.76 TeV and sNN=5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the hot Quantum Chromodynamics (QCD) matter created in nuclear collisions at collider energies. Jets are reconstructed from charged particles using the anti-kT jet algorithm and resolution parameter R=0.4. The jets are measured in the pseudorapidity range |ηjet|<0.5 and in three intervals of transverse momentum between 60 GeV/c and 120 GeV/c. The measurement of the jet mass in central Pb–Pb collisions is compared to the jet mass as measured in p–Pb reference collisions, to vacuum event generators, and to models including jet quenching. It is observed that the jet mass in central Pb–Pb collisions is consistent within uncertainties with p–Pb reference measurements. Furthermore, the measured jet mass in Pb–Pb collisions is not reproduced by the quenching models considered in this letter and is found to be consistent with PYTHIA expectations within systematic uncertainties.

AB - This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at sNN=2.76 TeV and sNN=5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the hot Quantum Chromodynamics (QCD) matter created in nuclear collisions at collider energies. Jets are reconstructed from charged particles using the anti-kT jet algorithm and resolution parameter R=0.4. The jets are measured in the pseudorapidity range |ηjet|<0.5 and in three intervals of transverse momentum between 60 GeV/c and 120 GeV/c. The measurement of the jet mass in central Pb–Pb collisions is compared to the jet mass as measured in p–Pb reference collisions, to vacuum event generators, and to models including jet quenching. It is observed that the jet mass in central Pb–Pb collisions is consistent within uncertainties with p–Pb reference measurements. Furthermore, the measured jet mass in Pb–Pb collisions is not reproduced by the quenching models considered in this letter and is found to be consistent with PYTHIA expectations within systematic uncertainties.

UR - https://www.scopus.com/pages/publications/85036586402

U2 - 10.1016/j.physletb.2017.11.044

DO - 10.1016/j.physletb.2017.11.044

M3 - Article

AN - SCOPUS:85036586402

SN - 0370-2693

VL - 776

SP - 249

EP - 264

JO - Physics Letters B

JF - Physics Letters B

ER -

First measurement of jet mass in Pb–Pb and p–Pb collisions at the LHC

Abstract

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