A neutron star mixed with dark fermions from a hypothesized neutron decay branch can match observed masses and radii only for dark matter mass 370-400 MeV and vector coupling near 0.01 MeV^-1, producing a dark star with a nucleonic shell.
Neutron’s Dark Secret
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Implications of the recent neutron decay measurements on the properties of compact objects -- a dark star with nucleonic shell ?
A neutron star mixed with dark fermions from a hypothesized neutron decay branch can match observed masses and radii only for dark matter mass 370-400 MeV and vector coupling near 0.01 MeV^-1, producing a dark star with a nucleonic shell.