Charm contribution to bulk viscosity
Publisher DOI
Abstract
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 ≲20 fm/c for T≳600 MeV.
Date Issued
2015-02-18
Publication Type
Article
Subject(s)
Language(s)
en
Additional Credits
Journal
European physical journal. C - particles and fields
Publisher
EDP Sciences
ISSN
1434-6044
Access(Rights)
open.access