Equation of state of hypernuclear matter: tuning hyperon--scalar-meson couplings
Abstract
We discuss to which extent the modifications of the hyperon--scalar-meson coupling constants affect the equation of state (EoS) hypernuclear matter. The study is carried out within a relativistic density functional theory. The nucleonic matter is described in terms of a density-dependent parametrization of nucleon-meson couplings, whereas the hyperon--meson couplings are deduced from the octet model. We identify the parameter space of hyperon-meson couplings for which massive stellar configurations with exist. We also discuss the EoS at finite temperatures with and without of a trapped neutrino component and show that neutrinos stiffen the EoS and change qualitatively the composition of stellar matter.
Keywords
Cite
@article{arxiv.1401.1653,
title = {Equation of state of hypernuclear matter: tuning hyperon--scalar-meson couplings},
author = {Giuseppe Colucci and Armen Sedrakian},
journal= {arXiv preprint arXiv:1401.1653},
year = {2014}
}
Comments
6 pages, 4 figures, Proceedings of International Conference on "The Modern Physics of Compact Stars and Relativistic Gravity", 18-21 September 2013, Yerevan, Armenia