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Title
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Observation and studies of jet quenching in PbPb collisions at = 2.76 TeV
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| 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. |
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Language
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English
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Source (journal)
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Physical review : C : nuclear physics. - Lancaster, Pa, 1970 - 2015
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Publication
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Lancaster, Pa
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2011
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ISSN
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0556-2813
[print]
1089-490X
[online]
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DOI
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10.1103/PHYSREVC.84.024906
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Volume/pages
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84
:2
(2011)
, p. 1-26
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Article Reference
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024906
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ISI
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000293841600001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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