Title
Observation and studies of jet quenching in PbPb collisions at <tex>$\sqrt{S_{NN}}$</tex> = 2.76 TeV</tex> Observation and studies of jet quenching in PbPb collisions at <tex>$\sqrt{S_{NN}}$</tex> = 2.76 TeV</tex>
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : C : nuclear physics. - Lancaster, Pa, 1970 - 2015
Volume/pages
84(2011) :2 , p. 1-26
ISSN
0556-2813
1089-490X
ISI
000293841600001
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
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 6.7 μb−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.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/1f323f/90539ad8.pdf
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