An Explanation for Heavy Quark Energy Loss Puzzle by Flow Effects

Luan Cheng; Enke Wang

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An Explanation for Heavy Quark Energy Loss Puzzle by Flow Effects

Luan Cheng 1 *,Enke Wang 2

1.Institute of Theoretical Physics, Dalian University of Technology, Dalian 116024;Institute of Particle Physics, Central China Normal University, Wuhan 430079

2.Institute of Particle Physics, Central China Normal University, Wuhan 430079;Key Laboratory of Quark & Lepton Physics (Central China Normal University), Ministry of Education, Wuhan 430079

*Correspondence author

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Funding: NSFC of China （No.11205024）, Ministry of Education of Chinaunder the Doctoral Grants （No.20120041120043）

Opened online:12 May 2016

Accepted by: none

Citation: Luan Cheng,Enke Wang.An Explanation for Heavy Quark Energy Loss Puzzle by Flow Effects[OL]. [12 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4686432

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.

Keywords:Jet Quenching; Collective Flow; Heavy quark; Dead cone effect

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