Observation and studies of jet quenching in PbPb collisions at √sNN=2.76 TeV
Name
Chatrchyan-2011-Observation and studies of jet quenching.pdf
Size
1.32 MB
Format
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Checksum (MD5)
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Author(s)
Alver, Burak Han
Bendavid, Joshua L.
Busza, Wit
Butz, Erik M.
Cali, Ivan Amos
Chan, M.
Dutta, Valentina
Everaerts, Pieter Bruno Bart
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Date Issued
August 2011
Journal
Physical Review C
Publisher
American Physical Society
Citation
Chatrchyan, S. et al. “Observation and studies of jet quenching in PbPb collisions at sqrt[s_{NN}]=2.76 TeV.” Physical Review C 84 (2011): n. pag. Web. 1 Dec. 2011. © 2011 American Physical Society
Version
Final published version
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[superscript −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 p[subscript T]=120 GeV/c) up to the statistical limit of the available data sample (jet p[subscript T]≈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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevC.84.024906
