Measurement of jet suppression in central Pb–Pb collisions at √sNN=2.76 TeV

ALICE Collaboration

doi:10.1016/j.physletb.2015.04.039

Measurement of jet suppression in central Pb–Pb collisions at √s_NN=2.76 TeV

ALICE Collaboration

Chair of Experimentalphysik - Dense and Strange Hadronic Matter

Czech Technical University in Prague
Nuclear Physics Institute of the Cas
Panjab University
European Organization for Nuclear Research
INFN Sez. di Torino
The Indian Institute of Technology Bombay
VECC Kolkata
COMSATS University Islamabad
Korea Institute of Science and Technology Information
Politecnico di Torino
Yale University
ITEP
National Research Centre "Kurchatov Institute"
University of Birmingham
Universidad Nacional Autónoma de México
Centro Fermi
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
Bogolyubov Institute for Theoretical Physics Nasu
Bergen University College
Frankfurt Institute for Advanced Studies
University of Bergen
University of St. Petersburg
University of São Paulo
Horia Hulubei National Institute of Physics and Nuclear Engineering
GSI Helmholtz Center
Heidelberg University
University of Münster
Rudjer Boskovic Institute
Dipartimento di Fisica 'G. Galilei' and INFN
l'institut du thorax
Johann Wolfgang Goethe University
DIBINEM, Alma Mater Studiorum, University of Bologna
Universidad de Santiago de Compostela
University of Oslo
Aligarh Muslim University
Laboratori Nazionali Del Sud
Gangneung-Wonju National University
University of Jammu
Commissariat A l'Énergie Atomique et Aux Énergies Alternatives, Centre de Saclay, IRFU
Technical University of Munich
Institute of Physics Bhubaneswar
Università di Catania
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
Hungarian Academy of Sciences
LAIC, Université d'Auvergne
Central China Normal University
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
Joint Inst. for Nuclear Research
Niels Bohr Institutet
Universite de Strasbourg
Benemerita Universidad Autonoma de Puebla
University of Houston
Wayne State University
National Research Nuclear University MEPhI
Petersburg Nuclear Phys. Inst.
the University of Utrecht
Gauhati University
Tsukuba University
INFN, Laboratori Nazionali Di Frascati
National Institute of Science Education and Research
CIEMAT Energy Department
Lawrence Berkeley National Laboratory
P. J. Safarik University
Pusan National University
STFC Daresbury Laboratory
National Research Foundation
Science Park 105
Purdue University
University of Helsinki and Helsinki Institute of Physics
Russian Federal Nuclear Center (VNIIEF)
Ohio State University
Pontifical Catholic University of Peru San Miguel
INFN- Sezione di Trieste
University of Tennessee
University of Cagliari
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
University of Jyväskylä
University of Liverpool
Saha Institute of Nuclear Physics
Creighton University
Université Claude Bernard Lyon 1
University of Campinas
Lund University
Sezione INFN di Cagliari
University of Cape Town
University of Grenoble Alpes
University Paris-Sud
CINVESTAV
Oak Ridge National Laboratory
Sezione INFN di Roma La Sapienza
Instituto de Ciencias Nucleares de la UNAM
Institute of Space Sciences
Bose Institute
National Center for Nuclear Research (NCBJ)
University of Zagreb
Institute for High Energy Physics (IHEP)
Institute for Nuclear Research of the Russian Academy of Sciences
University of Athens
Chicago State University
University of Split
Warsaw Institute of Technology
A.I. Alikhanyan National Science Laboratory (YerPhi)
University of Tokyo
University of Tübingen
Sejong University
Institute of Experimental Physics Slovak Academy of Sciences
Yonsei University
KTO Karatay University
Fachhochschule Worms
California Polytechnic State University, San Luis Obispo
University of Texas at Austin
Suranaree University of Technology
Inha University
University of South-Eastern Norway
Universidad Autonoma de Sinaloa
China Institute of Atomic Energy
Institute of Physics of the Czech Academy of Sciences
Dipartimento di Fisica
Comenius University
Laboratory for Thermal Engineering and Energy
Politecnico di Bari
Indian Institute of Technology Indore
Konkuk University
Hiroshima University
Budker Institute of Nuclear Physics (SB RAS)
University of Rajasthan
Laboratori Nazionali di Legnaro
Lawrence Livermore National Laboratory
CNRS/IN2P3 and Université Paris 11
University of the Witwatersrand, Johannesburg

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

152 Scopus citations

Abstract

The transverse momentum (p_T) spectrum and nuclear modification factor (R_AA) of reconstructed jets in 0–10% and 10–30% central Pb–Pb collisions at s_NN=2.76 TeV were measured. Jets were reconstructed using the anti-k_T jet algorithm with a resolution parameter of R=0.2 from charged and neutral particles, utilizing the ALICE tracking detectors and Electromagnetic Calorimeter (EMCal). The jet p_T spectra are reported in the pseudorapidity interval of |η_jet|<0.5 for 40<p_T,jet<120 GeV/c in 0–10% and for 30<p_T,jet<100 GeV/c in 10–30% collisions. Reconstructed jets were required to contain a leading charged particle with p_T>5 GeV/c to suppress jets constructed from the combinatorial background in Pb–Pb collisions. The leading charged particle requirement applied to jet spectra both in pp and Pb–Pb collisions had a negligible effect on the R_AA. The nuclear modification factor R_AA was found to be 0.28±0.04 in 0–10% and 0.35±0.04 in 10–30% collisions, independent of p_T,jet within the uncertainties of the measurement. The observed suppression is in fair agreement with expectations from two model calculations with different approaches to jet quenching.

Original language	English
Pages (from-to)	1-14
Number of pages	14
Journal	Physics Letters B
Volume	746
DOIs	https://doi.org/10.1016/j.physletb.2015.04.039
State	Published - 30 Jun 2015

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10.1016/j.physletb.2015.04.039

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@article{f100a5815a0b44b18e61b04e6790c9a2,

title = "Measurement of jet suppression in central Pb–Pb collisions at √sNN=2.76 TeV",

abstract = "The transverse momentum (pT) spectrum and nuclear modification factor (RAA) of reconstructed jets in 0–10\% and 10–30\% central Pb–Pb collisions at sNN=2.76 TeV were measured. Jets were reconstructed using the anti-kT jet algorithm with a resolution parameter of R=0.2 from charged and neutral particles, utilizing the ALICE tracking detectors and Electromagnetic Calorimeter (EMCal). The jet pT spectra are reported in the pseudorapidity interval of |ηjet|<0.5 for 40T,jet<120 GeV/c in 0–10\% and for 30T,jet<100 GeV/c in 10–30\% collisions. Reconstructed jets were required to contain a leading charged particle with pT>5 GeV/c to suppress jets constructed from the combinatorial background in Pb–Pb collisions. The leading charged particle requirement applied to jet spectra both in pp and Pb–Pb collisions had a negligible effect on the RAA. The nuclear modification factor RAA was found to be 0.28±0.04 in 0–10\% and 0.35±0.04 in 10–30\% collisions, independent of pT,jet within the uncertainties of the measurement. The observed suppression is in fair agreement with expectations from two model calculations with different approaches to jet quenching.",

author = "\{ALICE Collaboration\} and J. Adam and D. Adamov{\'a} and Aggarwal, \{M. M.\} and \{Aglieri Rinella\}, G. and M. Agnello and N. Agrawal and Z. Ahammed and I. Ahmed and Ahn, \{S. U.\} and I. Aimo and S. Aiola and M. Ajaz and A. Akindinov and Alam, \{S. N.\} 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 S. Altinpinar and I. Altsybeev and \{Alves Garcia Prado\}, C. and C. Andrei and A. Andronic and V. Anguelov and J. Anielski and T. Anti{\v c}i{\'c} and F. Antinori and P. Antonioli and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and N. Armesto and R. Arnaldi and T. Aronsson and Arsene, \{I. C.\} and M. Arslandok and A. Augustinus and R. Averbeck and Azmi, \{M. D.\} and M. Bach and A. Badal{\`a} and Baek, \{Y. W.\} and S. Bagnasco and R. Bailhache and R. Bala and L. Fabbietti",

note = "Publisher Copyright: {\textcopyright} 2015 CERN for the benefit of the ALICE Collaboration",

year = "2015",

month = jun,

day = "30",

doi = "10.1016/j.physletb.2015.04.039",

language = "English",

volume = "746",

pages = "1--14",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Measurement of jet suppression in central Pb–Pb collisions at √sNN=2.76 TeV

AU - ALICE Collaboration

AU - Adam, J.

AU - Adamová, D.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmed, I.

AU - Ahn, S. U.

AU - Aimo, I.

AU - Aiola, S.

AU - Ajaz, M.

AU - Akindinov, A.

AU - Alam, S. N.

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 - Altinpinar, S.

AU - Altsybeev, I.

AU - Alves Garcia Prado, C.

AU - Andrei, C.

AU - Andronic, A.

AU - Anguelov, V.

AU - Anielski, J.

AU - Antičić, T.

AU - Antinori, F.

AU - Antonioli, P.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Armesto, N.

AU - Arnaldi, R.

AU - Aronsson, T.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Azmi, M. D.

AU - Bach, M.

AU - Badalà, A.

AU - Baek, Y. W.

AU - Bagnasco, S.

AU - Bailhache, R.

AU - Bala, R.

AU - Fabbietti, L.

PY - 2015/6/30

Y1 - 2015/6/30

N2 - The transverse momentum (pT) spectrum and nuclear modification factor (RAA) of reconstructed jets in 0–10% and 10–30% central Pb–Pb collisions at sNN=2.76 TeV were measured. Jets were reconstructed using the anti-kT jet algorithm with a resolution parameter of R=0.2 from charged and neutral particles, utilizing the ALICE tracking detectors and Electromagnetic Calorimeter (EMCal). The jet pT spectra are reported in the pseudorapidity interval of |ηjet|<0.5 for 40T,jet<120 GeV/c in 0–10% and for 30T,jet<100 GeV/c in 10–30% collisions. Reconstructed jets were required to contain a leading charged particle with pT>5 GeV/c to suppress jets constructed from the combinatorial background in Pb–Pb collisions. The leading charged particle requirement applied to jet spectra both in pp and Pb–Pb collisions had a negligible effect on the RAA. The nuclear modification factor RAA was found to be 0.28±0.04 in 0–10% and 0.35±0.04 in 10–30% collisions, independent of pT,jet within the uncertainties of the measurement. The observed suppression is in fair agreement with expectations from two model calculations with different approaches to jet quenching.

AB - The transverse momentum (pT) spectrum and nuclear modification factor (RAA) of reconstructed jets in 0–10% and 10–30% central Pb–Pb collisions at sNN=2.76 TeV were measured. Jets were reconstructed using the anti-kT jet algorithm with a resolution parameter of R=0.2 from charged and neutral particles, utilizing the ALICE tracking detectors and Electromagnetic Calorimeter (EMCal). The jet pT spectra are reported in the pseudorapidity interval of |ηjet|<0.5 for 40T,jet<120 GeV/c in 0–10% and for 30T,jet<100 GeV/c in 10–30% collisions. Reconstructed jets were required to contain a leading charged particle with pT>5 GeV/c to suppress jets constructed from the combinatorial background in Pb–Pb collisions. The leading charged particle requirement applied to jet spectra both in pp and Pb–Pb collisions had a negligible effect on the RAA. The nuclear modification factor RAA was found to be 0.28±0.04 in 0–10% and 0.35±0.04 in 10–30% collisions, independent of pT,jet within the uncertainties of the measurement. The observed suppression is in fair agreement with expectations from two model calculations with different approaches to jet quenching.

UR - https://www.scopus.com/pages/publications/85040565135

U2 - 10.1016/j.physletb.2015.04.039

DO - 10.1016/j.physletb.2015.04.039

M3 - Article

AN - SCOPUS:85040565135

SN - 0370-2693

VL - 746

SP - 1

EP - 14

JO - Physics Letters B

JF - Physics Letters B

ER -

Measurement of jet suppression in central Pb–Pb collisions at √s_NN=2.76 TeV

Abstract

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