Chemical Relaxation Times in a Hadron Gas at Finite Temperature

Details Chemical Relaxation Times in a Hadron Gas at Finite Temperature Chemical Relaxation Times in a Hadron Gas at Finite Temperature

1993-10-17

arxiv.org/abs/hep-ph/9310296v1

Phys.Lett. B319 (1993) 401-406

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pgs. 2 tables. LaTex. CEBAF-TH-93

Scientific paper

10.1016/0370-2693(93)91741-5

The relaxation times of particle numbers in hot hadronic matter with vanishing baryon number are estimated using the ideal gas approximation and taking into account resonance decays and annihilation processes as the only sources of particle number fluctuations. Near the QCD critical temperature the longest relaxation times turn out to be of the order of 10 fm and grow roughly exponentially to become of the order of $10^{3}$ fm at temperatures around 100 MeV. As a consequence of such long relaxation times, a clear departure from chemical equilibrium must be observed in the momentum distribution of secondary particles produced in high energy nuclear collisions.

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