Bulk viscosity, particle spectra and flow in heavy-ion collisions

Details Bulk viscosity, particle spectra and flow in heavy-ion collisions Bulk viscosity, particle spectra and flow in heavy-ion collisions

2011-09-23

arxiv.org/abs/1109.5181v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

We study the effects of bulk viscosity on pT spectra and elliptic flow in heavy ion collisions. For this purpose we compute the dissipative correction df to the single particle distribution functions in leading-log QCD, and in several simplified models. We consider, in particular, the relaxation time approximation and a kinetic model for the hadron resonance gas. We implement these distribution functions in a hydrodynamic simulation of Au + Au collisions at RHIC. We find significant corrections due to bulk viscosity in hadron pT spectra and the differential elliptic flow parameter v2(pT). These corrections are dominated by viscous corrections to the distribution function. We find that the relation between df and the bulk viscosity is different in the quark gluon plasma and hadronic phases. Reliable bounds on the bulk viscosity require accurate calculations of df in a hadronic resonance gas. Based on v2 spectra at RHIC we conservatively estimate zeta/s <= 0.05 near freeze-out. We also find that effects of the bulk viscosity on the pT integrated v2 are small.

Affiliated with

Also associated with

No associations

Rating

Bulk viscosity, particle spectra and flow in heavy-ion collisions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Bulk viscosity, particle spectra and flow in heavy-ion collisions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bulk viscosity, particle spectra and flow in heavy-ion collisions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-601600