中国物理B ›› 2009, Vol. 18 ›› Issue (11): 4786-4790.doi: 10.1088/1674-1056/18/11/030

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Effects of bulk viscosity on hadron spectra and the Hanbury-Brown Twiss radius by causal viscous hydrodynamics

马余刚1, 马国亮1, 李建伟2   

  1. (1)Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (2)Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;Graduate School of the Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2008-12-21 修回日期:2009-01-13 出版日期:2009-11-20 发布日期:2009-11-20
  • 基金资助:
    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).

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)   

  1. 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
  • Received:2008-12-21 Revised:2009-01-13 Online:2009-11-20 Published:2009-11-20
  • Supported by:
    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).

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摘要： 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 R_\rm out/R_\rm side of HBT radii in the direction of the total transverse momentum of detected two particles (R_\rm out) and perpendicular to both this direction and the beam direction (R_\rm side) become a little steeper.

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.

Key words: relativistic hydrodynamics, bulk viscosity, hadron spectra, HBT radius

中图分类号:  (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))

  • 25.75.-q
27.80.+w (190 ≤ A ≤ 219) 24.60.-k (Statistical theory and fluctuations)