Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-08-23
Fizika B18:141-150, 2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 5 figures and 1 table to be appear in Prog. Theor. Phys
Scientific paper
In framework of statistical models, different particle ratios at energies ranging from $3.5 $ to $200 $GeV are calculated. Assuming that the particle production takes place along the freeze-out curve, we study the sharp peak in $K^+/\pi^+$ ratio observed at SPS energy. We study the responsibility of non-equilibrium quark occupancy of phase space $\gamma_i$ for particle production. Allowing $\gamma_i$ to take values other than that of equilibrium, we got a very well description for $K^+/\pi^+$ ratio at all energies. Using the resulting parameter set, we analyzed the $K^-/\pi^-$, $\Lambda/\pi^+$ and \hbox{$\Lambda/<\pi>$} ratios. We found that the corresponding peaks all are located at the same value of energy, $\sqrt{s_{NN}}^{(c)}\simeq7.5 $GeV. At this energy, the entropy per particle is singular. The saddle-point in entropy per particle likely refers to critical phenomenon and change in the phase space.
No associations
LandOfFree
Particle Ratios 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 Particle Ratios in Heavy-Ion Collisions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Particle Ratios in Heavy-Ion Collisions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-268923