Pion mass effects on axion emission from neutron stars through NN bremsstrahlung processes
Nuclear Theory
2010-01-21 v2
Abstract
The rates of axion emission by nucleon-nucleon bremsstrahlung are calculated with the inclusion of the full momentum contribution from a nuclear one pion exchange (OPE) potential. The contributions of the neutron-neutron (nn), proton-proton (pp) and neutron-proton (np) processes in both the nondegenerate and degenerate limits are explicitly given. We find that the finite momentum corrections to the emissivities are quantitatively significant for the non-degenerate regime and temperature-dependent, and should affect the existing axion mass bounds. The trend of these nuclear effects is to diminish the emissivities.
Keywords
Cite
@article{arxiv.0906.3134,
title = {Pion mass effects on axion emission from neutron stars through NN bremsstrahlung processes},
author = {S. Stoica and B. Pastrav and J. E. Horvath and M. P. Allen},
journal= {arXiv preprint arXiv:0906.3134},
year = {2010}
}