Effects of bulk viscosity on hadron spectra and the Hanbury-Brown Twiss radius by causal viscous hydrodynamics
Li Jian-Wei(李建伟)a)b), Ma Yu-Gang(马余刚)a)†, and Ma Guo-Liang(马国亮)a)
a Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; b Graduate School of the Chinese Academy of Sciences, Beijing 100080, China
Abstract The particle spectra and Hanbury-Brown Twiss (HBT) radius of Au+Au collisions at RHIC energy are investigated by a hydrodynamical expanding source with both shear and bulk viscosities ($\zeta$). With a large width of the ratio of $\zeta$ to entropy density s, both the particle transverse momentum spectra and the ratio Rout/Rside of HBT radii in the direction of the total transverse momentum of detected two particles (Rout) and perpendicular to both this direction and the beam direction (Rside) become a little steeper.
Received: 21 December 2008
Revised: 13 January 2009
Accepted manuscript online:
PACS:
25.75.-q
(Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions))
Fund: Project supported in part by the
National Natural Science Foundation of China (Grant Nos 10610285,
10775167 and 10705044), the Knowledge Innovation Project of Chinese
Academy of Sciences (Grant Nos KJCX2-YW-A14 and KJCX3-SYW-N2), and
the Startup Foundation for the CAS Presidential Scholarship Award of
China (Grant No 29010702).
Cite this article:
Li Jian-Wei(李建伟), Ma Yu-Gang(马余刚), and Ma Guo-Liang(马国亮) Effects of bulk viscosity on hadron spectra and the Hanbury-Brown Twiss radius by causal viscous hydrodynamics 2009 Chin. Phys. B 18 4786
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