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Studies of jet quenching using isolated-photon plus jet correlations in PbPb and pp collisions at root s(NN)=2.76 TeV
CMS Collaboration
2013
发表期刊PHYSICS LETTERS B
卷号718期号:3页码:773-794
通讯作者Sphicas, P (reprint author), CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland.
摘要Results from the first study of isolated-photon + jet correlations in relativistic heavy ion collisions are 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 150 mu b(-1) recorded by the CMS experiment at the LHC. For events containing an isolated photon with transverse momentum p(T)(gamma) > 60 GeV/c and an associated jet with p(T)(Jet) > 30 GeV/c, the photon + jet P-T imbalance is studied as a function of collision centrality and compared to pp data and PYFHIA calculations at the same collision energy. Using the of the isolated photon as an estimate of the momentum of the associated parton at production, this measurement allows an unbiased characterisation of the in-medium parton energy loss. For more central PbPb collisions, a significant decrease in the ratio p(T)(Jet)/p(T)(gamma) pi. relative to that in the PYFHIA reference is observed. Furthermore, significantly more p(T)(gamma) > 60 GeV/c photons in PbPb are observed not to have an associated p(T)(Jet) > 30 GeV/c jet, compared to the reference. However, no significant broadening of the photon + jet azimuthal correlation is observed. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.
关键词QUARK-GLUON PLASMA RADIATIVE ENERGY-LOSS HEAVY-ION COLLISIONS MATTER
学科领域Physics
DOI10.1016/j.physletb.2012.11.003
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000314259500011
引用统计
被引频次:93[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213442
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Studies of jet quenching using isolated-photon plus jet correlations in PbPb and pp collisions at root s(NN)=2.76 TeV[J]. PHYSICS LETTERS B,2013,718(3):773-794.
APA CMS Collaboration.(2013).Studies of jet quenching using isolated-photon plus jet correlations in PbPb and pp collisions at root s(NN)=2.76 TeV.PHYSICS LETTERS B,718(3),773-794.
MLA CMS Collaboration."Studies of jet quenching using isolated-photon plus jet correlations in PbPb and pp collisions at root s(NN)=2.76 TeV".PHYSICS LETTERS B 718.3(2013):773-794.
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