Charm contribution to bulk viscosity

被引：5

作者：

Laine, M. ^{[1
]}

Sohrabi, Kiyoumars A. ^{[1
]}

机构：

[1] Univ Bern, Albert Einstein Ctr, Inst Theoret Phys, CH-3012 Bern, Switzerland

来源：

EUROPEAN PHYSICAL JOURNAL C | 2015年 / 75卷 / 02期

基金：

瑞士国家科学基金会;

关键词：

TRANSPORT-COEFFICIENTS;

D O I：

10.1140/epjc/s10052-015-3297-9

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In the range of temperatures reached in future heavy ion collision experiments, hadronic pair annihilations and creations of charm quarks may take place within the lifetime of the plasma. As a result, charm quarks may increase the bulk viscosity affecting the early stages of hydrodynamic expansion. Assuming thermalisation, we estimate the charm contribution to bulk viscosity within the same effective kinetic theory framework in which the light parton contribution has been computed previously. The time scale at which this physics becomes relevant is related to the width of the transport peak associated with the trace anomaly correlator and is found to be less than or similar to 20 fm/c for T greater than or similar to 600 MeV.

引用

页码：1 / 7

页数：7

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