Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2008-12-09
Phys. Rev. C 79:051901(R), 2009
Physics
Nuclear Physics
Nuclear Experiment
6 pages, 3 figures; update text and references
Scientific paper
10.1103/PhysRevC.79.051901
We have implemented the Tsallis statistics in a Blast-Wave model and applied it to mid-rapidity transverse-momentum spectra of identified particles measured at RHIC. This new Tsallis Blast-Wave function fits the RHIC data very well for $p_T<$3 GeV/$c$. We observed that the collective flow velocity starts from zero in p+p and peripheral Au+Au collisions growing to 0.470 $\pm$ 0.009($c$) in central Au+Au collisions. The $(q-1)$ parameter, which characterizes the degree of non-equilibrium in a system, changes from $0.100\pm0.003$ in p+p to $0.015\pm0.005$ in central Au+Au collisions, indicating an evolution from a highly non-equilibrated system in p+p collisions toward an almost thermalized system in central Au+Au collisions. The temperature and collective velocity are well described by a quadratic dependence on $(q-1)$. Two sets of parameters in our Tsallis Blast-Wave model are required to describe the meson and baryon groups separately in p+p collisions while one set of parameters appears to fit all spectra in central Au+Au collisions.
Buren Gene van
Ruan Lijuan
Tang Zebo
Wang Fuqiang
Xu Yichun
No associations
LandOfFree
Spectra and radial flow at RHIC with Tsallis statistics in a Blast-Wave description 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 Spectra and radial flow at RHIC with Tsallis statistics in a Blast-Wave description, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectra and radial flow at RHIC with Tsallis statistics in a Blast-Wave description will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-281685