Pion mass effects on axion emission from neutron stars through NN bremsstrahlung processes

Details Pion mass effects on axion emission from neutron stars through NN bremsstrahlung processes Pion mass effects on axion emission from neutron stars through NN bremsstrahlung processes

2009-06-17

arxiv.org/abs/0906.3134v2

Nucl.Phys.A828:439-449,2009; Erratum-ibid A832:148,2010

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

10.1016/j.nuclphysa.2009.07.007

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.

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