Thermochemical equilibrium and strangeness production at freeze-out in S-S collisions at 200 GeV A-1

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作者
Saeed-Uddin [1 ]
机构
[1] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India
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O57 [原子核物理学、高能物理学];
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070202 ;
摘要
In the framework of our recently proposed model for the hadronic gas, the CERN NA35 collaboration data from central SS collisions at 200 GeV A(-1) are analysed. The model which provides a thermodynamically consistent equation of state (EOS) of hot hadronic matter consisting of hadrons with hard-core repulsion, is used to analyse the relative and absolute abundance of strange (antistrange) particles in full phase space. The analysis yields information regarding the thermal parameters at freeze-out, namely the light-quark fugacity lambda(q), the strange quark fugacity lambda(s), the temperature T and the strangeness phase-space saturation factor gamma(s). For the sake of comparison a similar analysis is performed by making use of the thermodynamically inconsistent model EOS. These results are further compared with those of Sollfrank er al obtained earlier by ignoring the hard-core hadronic repulsion and treating all hadrons as point particles and also those of Braun-Munzinger er al for limited phase-space data. Our models are generalized to allow for non-equilibrium strange-particle abundances.
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页码:779 / 789
页数:11
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