4 research outputs found
Constraints on Light Dark Matter From Core-Collapse Supernovae
We show that light ( 1 -- 30 MeV) dark matter particles can play a
significant role in core-collapse supernovae, if they have relatively large
annihilation and scattering cross sections, as compared to neutrinos. We find
that if such particles are lighter than 10 MeV and reproduce the
observed dark matter relic density, supernovae would cool on a much longer time
scale and would emit neutrinos with significantly smaller energies than in the
standard scenario, in disagreement with observations. This constraint may be
avoided, however, in certain situations for which the neutrino--dark matter
scattering cross sections remain comparatively small.Comment: 4 pages, 1 figur