2009/06/30 by S. Stoica, Bogdan A. Pastrav, B. Pastrav +2 · 12 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Axion #Bremsstrahlung #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Degenerate energy levels #Electron #Momentum (technical analysis) #Neutrino #Neutron #Nuclear matter #Nuclear physics #Nucleon #Particle physics #Physics #Pion #Proton #Quantum mechanics #nucl-th
paper · pdf · doi:10.1016/j.nuclphysa.2009.07.007
published in Nuclear Physics A 828(3-4), 439-449 (Elsevier BV)
openalex publication_date 2009/07/19 · arxiv created 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.