Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-10-24
Eur.Phys.J.A37:121-128,2008
Physics
Nuclear Physics
Nuclear Theory
8 pages, 7 figures; Accepted for publication in European Physical Journal A; Added discussion about the effect of weak decays
Scientific paper
10.1140/epja/i2007-10611-3
We study the effect of separate chemical and kinetic freeze-outs to the ideal hydrodynamical flow in Au+Au collisions at RHIC (sqrt(s_NN) = 200 GeV energy). Unlike in earlier studies we explore how these effects can be counteracted by changes in the initial state of the hydrodynamical evolution. We conclude that the reproduction of pion, proton and antiproton yields necessitates a chemical freeze-out temperature of T = 150 MeV instead of T = 160 - 170 MeV motivated by thermal models. Unlike previously reported, this lower temperature makes it possible to reproduce the p_T-spectra of hadrons if one assumes very small initial time, tau_0 = 0.2 fm/c. However, the p_T-differential elliptic flow, v_2(p_T) remains badly reproduced. This points to the need to include dissipative effects (viscosity) or some other refinement to the model.
No associations
LandOfFree
Chemical freeze-out temperature in hydrodynamical description of Au+Au collisions at sqrt(s_NN) = 200 GeV 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 Chemical freeze-out temperature in hydrodynamical description of Au+Au collisions at sqrt(s_NN) = 200 GeV, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical freeze-out temperature in hydrodynamical description of Au+Au collisions at sqrt(s_NN) = 200 GeV will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-654720