The Quenching of the Axial Coupling in Nuclear and Neutron-Star Matter

Details The Quenching of the Axial Coupling in Nuclear and Neutron-Star Matter The Quenching of the Axial Coupling in Nuclear and Neutron-Star Matter

2001-06-13

arxiv.org/abs/nucl-th/0106029v2

Phys.Lett. B525 (2002) 249-254

Physics

Nuclear Physics

Nuclear Theory

4 pages revtex, 2 eps figures

Scientific paper

10.1016/S0370-2693(01)01452-6

Using a chirally invariant effective Lagrangian, we calculate the density and isospin dependences of the in-medium axial coupling, $g_A^*$, in spatially uniform matter present in core collapse supernovae and neutron stars. The quenching of $g_A^*$ with density in matter with different proton fractions is found to be similar. However, our results suggest that the quenching of the nucleon's $g_A^*$ in matter with hyperons is likely to be significantly greater than in matter with nucleons only.

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