http://arxiv.org/abs/1911.13293
Dark matter can capture in neutron stars and heat them to observable luminosities. We study relativistic scattering of dark matter on highly degenerate electrons. We develop a Lorentz invariant formalism to calculate the capture probability of dark matter that accounts for the relativistic motion of the target particles and Pauli exclusion principle. We find that the actual capture probability can be five orders of magnitude larger than the one estimated using a nonrelativistic approach. For dark matter masses $10~{\rm eV}\textup{–}10~{\rm PeV}$, neutron star heating complements and can be more sensitive than terrestrial direct detection searches. Our results show that old neutron stars could be the most promising target for discovering leptophilic dark matter.
A. Joglekar, N. Raj, P. Tanedo, et. al.
Mon, 2 Dec 19
31/91
Comments: 6 pages, 1 figure