Hard-Core Radius of Nucleons within the Induced Surface Tension ApproachстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 21 мая 2019 г.
Аннотация:We review the recent approach to model the hadronic and nuclear matter equations of
state using the induced surface tension concept, which allows one to go far beyond the usual Van
der Waals approximation. Since the obtained equations of state, classical and quantum, are among
the most successful ones in describing the properties of low density phases of strongly interacting
matter, they set strong restrictions on the possible value of the hard-core radius of nucleons, which
is widely used in phenomenological equations of state. We summarize the latest results obtained
within this novel approach and perform a new detailed analysis of the hard-core radius of nucleons,
which follows from hadronic and nuclear matter properties. Such an analysis allows us to find the
most trustworthy range of its values: the hard-core radius of nucleons is 0.3–0.36 fm. A comparison
with the phenomenology of neutron stars implies that the hard-core radius of nucleons has to be
temperature and density dependent. Such a finding is supported when the eigenvolume of composite
particles like hadrons originates from their fermionic substructure due to the Pauli blocking effect.
Keywords: quark-hadron phase transition; excluded hadron volume; chemical freeze-out; neutron
star matter