Effects of Bulk Viscosity on $p_T$-Spectra and Elliptic Flow Parameter

Details Effects of Bulk Viscosity on $p_T$-Spectra and Elliptic Flow Parameter Effects of Bulk Viscosity on $p_T$-Spectra and Elliptic Flow Parameter

2009-07-17

arxiv.org/abs/0907.3078v2

Nucl.Phys.A830:471c-474c,2009

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee;

Scientific paper

10.1016/j.nuclphysa.2009.09.037

We estimate the effects of viscosity on the phase space distribution appearing in the Cooper-Frye formula within the framework of the Grad's fourteen moment method and find that there are non-trivialities in the discussion of a multi-component system. We calculate the viscous corrections of particle spectra and elliptic flow coefficients from the distortion of the distribution using the flow and the hypersurface taken from a (3+1)-dimensional ideal hydrodynamic simulation. We see that the bulk viscosity have visible effects on particle spectra. The results suggest we should treat both shear and bulk viscosity carefully when constraining the transport coefficients from experimental data.

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