Effects of medium-induced {rho}-{omega} meson mixing on the equation of state in isospin-asymmetric nuclear matter
Journal Article
·
· Physical Review. C, Nuclear Physics
- Department of Physics and Astronomy, Texas A and M University-Commerce, Commerce, Texas 75429 (United States)
We reexamine effects of the {rho}-{omega} meson mixing mediated by nucleon polarizations on the symmetry energy in isospin-asymmetric nuclear matter. Taking into account the rearrangement term neglected in previous studies by others, we evaluate the {rho}-{omega} mixing angle in a novel way within the relativistic mean-field models with and without chiral limits. It is found that the symmetry energy is significantly softened at high densities contrary to the finding in earlier studies. As the first step of going beyond the lowest-order calculations, we also solve the Dyson equation for the {rho}-{omega} mixing. In this case, it is found that the symmetry energy is not only significantly softened by the {rho}-{omega}mixing at suprasaturation densities, similar to the lowest-order {rho}-{omega} mixing, but interestingly also softened at subsaturation densities. In addition, the softening of the symmetry energy at subsaturation densities can be partly suppressed by the nonlinear self-interaction of the {sigma} meson.
- OSTI ID:
- 21293935
- Journal Information:
- Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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