Jet quenching and γ-jet correlation in high-energy heavy-ion collisions

被引：2
|
作者：
Wang, Xin-Nian [1 ,2 ,3 ]
Zhu, Yan [4 ,5 ]
机构：
[1] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China
[2] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China
[3] Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94740 USA
[4] Univ Santiago Compostela, Dept Fis Particulas, E-15706 Santiago De Compostela, Galicia, Spain
[5] Univ Santiago Compostela, IGFAE, E-15706 Santiago De Compostela, Galicia, Spain
来源：
NUCLEAR PHYSICS A | 2014年 / 932卷
基金：
欧洲研究理事会;
关键词：
Jet quenching; gamma-jet; Azimuthal angle correlation; Jet fragmentation function;
D O I：
10.1016/j.nuclphysa.2014.07.018
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Medium modification of gamma-tagged jets in high-energy heavy-ion collisions is investigated within a linearized Boltzmann transport model which includes both elastic parton scattering and induced gluon emission. In Pb + Pb collisions at root s = 2.76 TeV, a gamma-tagged jet is seen to lose 15% of its energy at 0-10% central collisions. Simulations also point to a sizable azimuthal angle broadening of gamma-tagged jets at the tail of a distribution which should be measurable when experimental errors are significantly reduced. An enhancement at large z(jet) = p(L)/E-jet in jet fragmentation function at the Large Hadron Collider (LHC) can be attributed to the dominance of leading particles in the reconstructed jet. A gamma-tagged jet fragmentation function is shown to be more sensitive to jet quenching, therefore a better probe of the jet transport parameter. (c) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：447 / 452
页数：6
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