Dynamical quark recombination in ultrarelativistic heavy-ion collisions and the proton to pion ratio

Details Dynamical quark recombination in ultrarelativistic heavy-ion collisions and the proton to pion ratio Dynamical quark recombination in ultrarelativistic heavy-ion collisions and the proton to pion ratio

2007-10-19

arxiv.org/abs/0710.3629v2

Phys.Rev.C77:044901,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 12 figures, version to appear in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.77.044901

We study quark thermal recombination as a function of energy density during the evolution of a heavy-ion collision in a numerical model that reproduces aspects of QCD phenomenology. We show that starting with a set of free quarks (or quarks and antiquarks) the probability to form colorless clusters of three quarks differs from that to form colorless clusters of quark-antiquark and that the former has a sharp jump at a critical energy density whereas the latter transits smoothly from the low to the high energy density domains. We interpret this as a quantitative difference in the production of baryons and mesons with energy density. We use this approach to compute the proton and pion spectra in a Bjorken scenario that incorporates the evolution of these probabilities with energy density, and therefore with proper time. From the spectra, we compute the proton to pion ratio and compare to data at the highest RHIC energies. We show that for a standard choice of parameters, this ratio reaches one, though the maximum is very sensitive to the initial evolution proper time.

Affiliated with

Also associated with

No associations

Rating

Dynamical quark recombination in ultrarelativistic heavy-ion collisions and the proton to pion ratio 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 Dynamical quark recombination in ultrarelativistic heavy-ion collisions and the proton to pion ratio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical quark recombination in ultrarelativistic heavy-ion collisions and the proton to pion ratio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-708293