Specific Heat Capacity In Relativistic Hard-Ion Collisions

Up to now, a lot of works have been done in Relativistic Heavy-Ion Collisions, But current status on studying specific heat in relativistic heavy ion collisions is very confuse, so it is necessary to study further.Statistical model is very successful describing heavy ion collision at intermediate and relativistic energies. One of the most important thermodynamic variables, heat capacity , a measure of the temperature (energy) fluctuation,and its singularity behavior is relevant to the phase transition. Lots of works have been done in heat capacity base on statistical, but different methods got different results. So we have to study specific heat base on heat capacity.Parton and hadron cascade model, PACIAE, is applied investigating the specific heat for Quark-Gluon Matter (QGM) scenario in initial partonic stage and the Hadron Matter scenario in final hadronic stage (HM v.QGM) in 0-5% most central Au + Au collisions at variety of energies from SPS to RHIC. In addition, the specific heat capacity is also calculated in a third simulation for the pure hadronic matter (HM).To be more precision, we take multiplicity into calculation, not only in transverse momentum distribution but also specific in heat capacity.Here we compare specific heat and temperature. Main works is focus on the relation between temperature, specific heat capacity, energy, and their trend.From the results of simulations, there is no peak in QGM and HM specific heats in the energy region, of our study specific heat capacity decreases as energy increases. We need further study to judg if specific heat is relevant to QGP (Quark-Gluon Plasma).