Azimuthal anisotropy of charged jet production in √sNN=2.76 TeV Pb–Pb collisions

ALICE Collaboration

doi:10.1016/j.physletb.2015.12.047

Azimuthal anisotropy of charged jet production in √s_NN=2.76 TeV Pb–Pb collisions

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
Korea Institute of Science and Technology Information
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
Universidad Autonoma de Sinaloa
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
Cluster of Excellence E-conversion
Technical University of Munich
University of Oslo
Aligarh Muslim University
Laboratori Nazionali Del Sud
Gangneung-Wonju National University
Konkuk University
University of Jammu
Commissariat A l'Énergie Atomique et Aux Énergies Alternatives, Centre de Saclay, IRFU
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
Inha University
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
Bose Institute
National Institute of Science Education and Research
University of Texas at Austin
Lawrence Berkeley National Laboratory
P. J. Safarik University
Pusan National University
STFC Daresbury Laboratory
University of Liverpool
National Research Foundation
Purdue University
University of Helsinki and Helsinki Institute of Physics
Russian Federal Nuclear Center (VNIIEF)
COMSATS University Islamabad
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
Technical University of Košice
University of Jyväskylä
Saha Institute of Nuclear Physics
Creighton University
Université Claude Bernard Lyon 1
University of Campinas
Science Park 105
Lund University
Sezione INFN di Cagliari
University of Cape Town
Institute of Experimental Physics Slovak Academy of Sciences
University of Grenoble Alpes
University Paris-Sud
Department of Physics
Oak Ridge National Laboratory
Sezione INFN di Roma La Sapienza
CINVESTAV
Instituto de Ciencias Nucleares de la UNAM
Institute of Space Sciences
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
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
Yonsei University
KTO Karatay University
Fachhochschule Worms
California Polytechnic State University, San Luis Obispo
Suranaree University of Technology
University of South-Eastern Norway
China Institute of Atomic Energy
Moscow State University
University of the Witwatersrand, Johannesburg
Institute of Physics of the Czech Academy of Sciences
Dipartimento di Fisica
Comenius University
Politecnico di Bari
Indian Institute of Technology Indore
Hiroshima University
Nagasaki Institute of Applied Science
Budker Institute of Nuclear Physics (SB RAS)
University of Rajasthan
Laboratori Nazionali di Legnaro
CNRS/IN2P3 and Université Paris 11
Stefan Meyer Institut für Subatomare Physik (SMI)

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

43 Scopus citations

Abstract

We present measurements of the azimuthal dependence of charged jet production in central and semi-central s_NN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v₂ ^{ch jet}. Jet finding is performed employing the anti-k_T algorithm with a resolution parameter R=0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero v₂ ^{ch jet} is observed in semi-central collisions (30–50% centrality) for 20<p_T ^{ch jet}<90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the v₂ of single charged particles at high p_T. Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions.

Original language	English
Pages (from-to)	511-525
Number of pages	15
Journal	Physics Letters B
Volume	753
DOIs	https://doi.org/10.1016/j.physletb.2015.12.047
State	Published - 10 Feb 2016

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10.1016/j.physletb.2015.12.047

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@article{14d5786ca8674c90a2d4e058bf4690d4,

title = "Azimuthal anisotropy of charged jet production in √sNN=2.76 TeV Pb–Pb collisions",

abstract = "We present measurements of the azimuthal dependence of charged jet production in central and semi-central sNN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v2 ch jet. Jet finding is performed employing the anti-kT algorithm with a resolution parameter R=0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero v2 ch jet is observed in semi-central collisions (30–50\% centrality) for 20T ch jet<90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the v2 of single charged particles at high pT. Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions.",

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 Ahn, \{S. U.\} and S. Aiola 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 Almaraz, \{J. R.M.\} 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 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 A. Baldisseri and Baral, \{R. C.\} and L. Fabbietti and Zimmermann, \{M. B.\}",

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

year = "2016",

month = feb,

day = "10",

doi = "10.1016/j.physletb.2015.12.047",

language = "English",

volume = "753",

pages = "511--525",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Azimuthal anisotropy of charged jet production in √sNN=2.76 TeV Pb–Pb collisions

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 - Ahn, S. U.

AU - Aiola, S.

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 - Almaraz, J. R.M.

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 - 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 - Baldisseri, A.

AU - Baral, R. C.

AU - Fabbietti, L.

AU - Zimmermann, M. B.

PY - 2016/2/10

Y1 - 2016/2/10

N2 - We present measurements of the azimuthal dependence of charged jet production in central and semi-central sNN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v2 ch jet. Jet finding is performed employing the anti-kT algorithm with a resolution parameter R=0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero v2 ch jet is observed in semi-central collisions (30–50% centrality) for 20T ch jet<90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the v2 of single charged particles at high pT. Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions.

AB - We present measurements of the azimuthal dependence of charged jet production in central and semi-central sNN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v2 ch jet. Jet finding is performed employing the anti-kT algorithm with a resolution parameter R=0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero v2 ch jet is observed in semi-central collisions (30–50% centrality) for 20T ch jet<90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the v2 of single charged particles at high pT. Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions.

UR - https://www.scopus.com/pages/publications/85040843301

U2 - 10.1016/j.physletb.2015.12.047

DO - 10.1016/j.physletb.2015.12.047

M3 - Article

AN - SCOPUS:85040843301

SN - 0370-2693

VL - 753

SP - 511

EP - 525

JO - Physics Letters B

JF - Physics Letters B

ER -

Azimuthal anisotropy of charged jet production in √s_NN=2.76 TeV Pb–Pb collisions

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