Abstract
Short range particle repulsion is rather important property of the hadronic and nuclear matter equations of state. We present a novel equation of state which is based on the virial expansion for the multicomponent mixtures with hard-core repulsion. In addition to the hard-core repulsion taken into account by the proper volumes of particles, this equation of state explicitly contains the surface tension which is induced by another part of the hard-core repulsion between particles. At high densities the induced surface tension vanishes and the excluded volume treatment of hard-core repulsion is switched to its proper volume treatment. Possible applications of this equation of state to a description of hadronic multiplicities measured in A+A collisions, to an investigation of the nuclear matter phase diagram properties and to the neutron star interior modeling are discussed.
Highlights
The excluded volume effects play a significant role in description of the experimental data measured in the nucleus-nucleus (A+A) collisions, in the studies of the nuclear matter phase diagram and in the modeling of the neutron star interiors
As it was shown in [1] the solution of this problem requires to account for the fact that at low densities an interparticle hard-core repulsion is well described by the excluded volume approximation, whereas the high density regime is controlled by the proper volume of particles
It is important that the IST equations of state (EoS) allows us to go far beyond the usual excluded-volume model (EVM)
Summary
The excluded volume effects play a significant role in description of the experimental data measured in the nucleus-nucleus (A+A) collisions, in the studies of the nuclear matter phase diagram and in the modeling of the neutron star interiors. Studies of such systems at high baryonic densities at which the usual Van der Waals approximation is inapplicable require more elaborate equations of state (EoS).
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