The shear viscosity of a chemically equilibrating quark-gluon plasma at finite baryon density
1 Guangxi Teachers Education University - Nanning, Guangxi 530001, China
2 Shanghai Institute of Applied Physics, Chinese Academy of Sciences - Shanghai 201800, China
Received: 12 June 2013
Accepted: 30 August 2013
Taking account of elastic and bremsstrahlung processes, as well as quark elastic scattering, we calculated the shear viscous coefficient of a chemically equilibrating quark-gluon plasma at finite baryon density. We found that the inelastic bremsstrahlung processes make the shear viscosity remarkably lower, and the ratio of shear viscosity to entropy density increases with increasing initial quark chemical potential. Considering the effect of shear viscosity the evolution of the QGP system was investigated. We found that the evolution of the system becomes slower owing to viscosity compared to the one in the ideal case, and the inelastic bremsstrahlung processes make the slower rate of the system not as much as in our previous calculations.
PACS: 25.75.-q – Relativistic heavy-ion collisions / 12.38.Mh – Quark-gluon plasma / 24.10.Nz – Hydrodynamic models
© EPLA, 2013