Study of jet quenching using photon-jet events in PbPb collisions at 2.76 TeV with CMS

Author(s)
Lai, Yue Shi
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Abstract
The first measurement of the transverse momentum (p[subscript T]) imbalance of isolated–photon + jet pairs in relativistic heavy ion collisions is reported. The analysis uses data from PbPb collisions at a centre-of-mass energy of 2.76 TeV per nucleon pair, corresponding to an integrated luminosity of 150μb[superscript −1] recorded by the CMS experiment at the LHC in 2011. For events containing an isolated photon with transverse momentum p[subscript T] > 60GeV/c and an associated jet with p[subscript T] > 30GeV/c, the photon + jet p[subscript T] imbalance is studied as a function of collision centrality and compared to pp data and pythia calculations at the same centre-of-mass energy. Using the p[subscript T] of the isolated photon as an estimate of the energy of the scattered parton, this measurement allows an unbiased characterization of the in-medium parton energy loss.
Date issued
2013-05
URI
http://hdl.handle.net/1721.1/90554
Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Nuclear Physics A
Publisher
Elsevier
Citation
Lai, Yue Shi. “Study of Jet Quenching Using Photon-Jet Events in PbPb Collisions at 2.76 TeV with CMS.” Nuclear Physics A 904–905 (May 2013): 685c–688c. © 2013 CERN for the benefit of the CMS Collaboration
Version: Final published version
ISSN
03759474
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