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Nuclear matter equation of state and σ-meson parameters
Authors:A. B. Santra  U. Lombardo
Affiliation:(1) Nuclear Physics Division, Bhabha Atomic Research Centre, 400 085 Mumbai, India;(2) Dipartimento di Fisica, Universita di Catania and INFN-LNS, Via S. Sofia 44, I-95123 Catania, Italy
Abstract:We try to determine phenomenologically the extent of in-medium modification of σ-meson parameters so that the saturation observables of the nuclear matter equation of state (EOS) are reproduced. To calculate the EOS we have used Brueckner-Bethe-Goldstone formalism with Bonn potential as two-body interaction. We find that it is possible to understand all the saturation observables, namely, saturation density, energy per nucleon and incompressibility, by incorporating in-medium modification of σ-meson-nucleon coupling constant and σ-meson mass by a few per cent.
Keywords:Nuclear matter equation of state  medium modification of meson parameters
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