Artículos de revistas
Observation and studies of jet quenching in PbPb collisions at √sNN=2.76 TeV
Fecha
2011-08-12Registro en:
Physical Review C - Nuclear Physics, v. 84, n. 2, 2011.
1089-490X
0556-2813
10.1103/PhysRevC.84.024906
2-s2.0-80052186915
Autor
Yerevan Physics Institute
Institut für Hochenergiephysik der OeAW
National Centre for Particle and High Energy Physics
Universiteit Antwerpen
Vrije Universiteit Brussel
Université Libre de Bruxelles
Ghent University
Université Catholique de Louvain
Université de Mons
Centro Brasileiro de Pesquisas Fisicas
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Estadual Paulista (UNESP)
Institute for Nuclear Research and Nuclear Energy
University of Sofia
Institute of High Energy Physics
Peking University
Universidad de Los Andes
Technical University of Split
University of Split
Institute Rudjer Boskovic
University of Cyprus
Charles University
Egyptian Network of High Energy Physics
National Institute of Chemical Physics and Biophysics
University of Helsinki
Helsinki Institute of Physics
Lappeenranta University of Technology
IN2P3-CNRS
CEA/Saclay
CNRS/IN2P3
Institut National de Physique Nucleaire et de Physique des Particules (IN2P3)
Institut de Physique Nucléaire de Lyon
Academy of Science
Tbilisi State University
I. Physikalisches Institut
III. Physikalisches Institut A
III. Physikalisches Institut B
Deutsches Elektronen-Synchrotron
University of Hamburg
Institut für Experimentelle Kernphysik
Institute of Nuclear Physics Demokritos
University of Athens
University of Ioánnina
KFKI Research Institute for Particle and Nuclear Physics
Institute of Nuclear Research ATOMKI
University of Debrecen
Panjab University
University of Delhi
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research-EHEP
Tata Institute of Fundamental Research HECR
Institute for Research and Fundamental Sciences (IPM)
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Università di Napoli Federico II
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Institute for Theoretical and Experimental-Physics
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Mersin University
Adiyaman University
Izmir Institute of Technology
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Ege University
Rutherford Appleton Laboratory
University of Southampton
Institución
Resumen
Jet production in PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV was studied with the Compact Muon Solenoid (CMS) detector at the LHC, using a data sample corresponding to an integrated luminosity of 6.7μb-1. Jets are reconstructed using the energy deposited in the CMS calorimeters and studied as a function of collision centrality. With increasing collision centrality, a striking imbalance in dijet transverse momentum is observed, consistent with jet quenching. The observed effect extends from the lower cutoff used in this study (jet pT=120 GeV/c) up to the statistical limit of the available data sample (jet pT≈210 GeV/c). Correlations of charged particle tracks with jets indicate that the momentum imbalance is accompanied by a softening of the fragmentation pattern of the second most energetic, away-side jet. The dijet momentum balance is recovered when integrating low transverse momentum particles distributed over a wide angular range relative to the direction of the away-side jet. © 2011 American Physical Society.