Heavy-quark transport coefficients in a hot viscous quark-gluon plasma medium

被引：37

作者：

Das, Santosh K. ^{[1
,2
,3
]}

Chandra, Vinod ^{[4
]}

Alam, Jan-e ^{[5
]}

机构：

[1] Yonsei Univ, Dept Phys, Seoul 120749, South Korea

[2] Univ Catania, Dept Phys & Astron, I-95125 Catania, Italy

[3] INFN LNS, Lab Nazl Sud, I-95123 Catania, Italy

[4] Ist Nazl Fis Nucl, Sez Firenze, I-50019 Florence, Italy

[5] Ctr Variable Energy Cyclotron, Kolkata 700064, India

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2014年 / 41卷 / 01期

基金：

欧洲研究理事会;

关键词：

EFFECTIVE MODEL; BULK VISCOSITY; SPECTRA;

D O I：

10.1088/0954-3899/41/1/015102

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：

Heavy-quark (HQ) transport coefficients have been estimated for a viscous quark-gluon plasma (QGP) medium, utilizing a recently proposed quasi-particle description based on a realistic QGP equation of state (EoS). Interactions entering through the EoS significantly suppress the temperature dependence of the drag coefficient of QGP, compared to those of an ideal relativistic system of quarks and gluons. The inclusion of shear and bulk viscosities through the corrections to the thermal phase space factors of the bath particles alters the magnitude of the drag coefficient; the enhancement is significant at lower temperatures. In the competition between the effects of the EoS and dissipative corrections through phase space factors, the former eventually dictate how the drag coefficient would behave as a function of temperature and how much it quantitatively digresses from the ideal case. The observations suggest a significant impact of both the realistic EoS and the viscosities on the HQs transport at Relativistic Heavy Ion Collider and Large Hadron Collider collision energies.

引用

页数：16

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