On chemical equilibrium in nuclear collisions
نویسندگان
چکیده
منابع مشابه
On Chemical Equilibrium in Nuclear Collisions
The data on average hadron multiplicities in central A+A collisions measured at CERN SPS are analysed with the ideal hadron gas model. It is shown that the full chemical equilibrium version of the model fails to describe the experimental results. The agreement of the data with the off–equilibrium version allowing for partial strangeness saturation is significantly better. The freeze–out tempera...
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The Statistical Model is recognized as a powerful approach to describe particle yields established at chemical decoupling. It has to be formulated in the canonical ensemble with respect to strangeness conservation if the number of strange particles becomes small. However, in some cases canonical suppression under the assumption of strangeness chemical equilibrium in the whole fireball volume wa...
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Strange particles produced in S–Au/W/Pb 200 A GeV and Pb–Pb 158 A GeV reactions are described invoking final hadronic phase space in thermal equilibrium, but allowing chemical non-equilibrium. Several sets of statistical freeze-out parameters are obtained for each system, invoking different models of dense matter. We show that only when allowing for strange and non-strange flavor abundance non-...
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Recent work on chemical equilibrium in heavy ion collisions is reviewed. The energy dependence of thermal parameters is discussed. The centrality dependence of thermal parameters at SPS energies is presented.
متن کاملStrange Messages: Chemical and Thermal Freeze-out in Nuclear Collisions
Thermal models are commonly used to interpret heavy-ion data on particle yields and spectra and to extract the conditions of chemical and thermal freezeout in heavy-ion collisions. I discuss the usefulness and limitations of such thermal model analyses and review the experimental and theoretical evidence for thermalization in nuclear collisions. The crucial role of correlating strangeness produ...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 1998
ISSN: 1434-6044
DOI: 10.1007/s100520050256