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