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1. An Explanation for Heavy Quark Energy Loss Puzzle by Flow Effects | |||
Luan Cheng,Enke Wang | |||
Physics 05 May 2016 | |||
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Abstract:The heavy quark energy loss puzzle is explained by collective floweffects in a dynamic medium. The dead cone and LPM effect are foundto be changed comparing to the static medium case. The collectiveflow induces difference of two dead cones in two differentkinds of processes. One is from the projectile emitting gluonprocess, the same as that in the static medium. The other is fromthe gluon emission off the exchanged gluon process, decreasing withincreasing flow velocity $v_z$ along jet direction, which lead tothe increase of heavy quark energy loss. The differences in theeffective average energy loss among charm, bottom and light quarksare very little from a full 3D ideal hydrodynamic simulation for0-10$%$ central Au-Au collisions at RHIC energy. This would yieldsimilar high $p_{T}$ suppressions between light and heavy quarks forcentral Au-Au collisions. | |||
TO cite this article:Luan Cheng,Enke Wang. An Explanation for Heavy Quark Energy Loss Puzzle by Flow Effects[OL].[ 5 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4686432 |
2. Flow Effects on Jet Energy Loss with Detailed Balance | |||
Luan Cheng,Jia Liu,Enke Wang | |||
Physics 15 December 2014 | |||
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Abstract:In the presence of collective flow a new model potential describingthe interaction of the hard jet with scattering centers is derivedbased on the static color-screened Yukawa potential. The flow effecton jet quenching with detailed balance is investigated in pQCD. Itturns out, considering the collective flow with velocity vz along the jetdirection, the collective flow decreases the LPM destructiveinterference comparing to that in the static medium. The gluonabsorption plays a more important role in the moving medium. The collective flow increases the energy gain from gluon absorption, however,decreases the energy loss from gluon radiation, which is (1-vz) times asthat in the static medium to the first order of opacity. In the presence of collective flow,the second order in opacity correction is relatively small compared to the first order. So that thetotal effective energy loss is decreased. The flow dependence of theenergy loss will affect the suppression of high pT hadronspectrum and anisotropy parameter v2 in high-energy heavy-ioncollisions. | |||
TO cite this article:Luan Cheng,Jia Liu,Enke Wang. Flow Effects on Jet Energy Loss with Detailed Balance[J]. |
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