Some severe constraints on asymmetric dark matter are based on the scenario
that certain types of WIMPs can form mini-black holes inside neutron stars that
can lead to their destruction. A crucial element for the realization of this
scenario is that the black hole grows after its formation (and eventually
destroys the star) instead of evaporating. The fate of the black hole is
dictated by the two opposite mechanics i.e. accretion of nuclear matter from
the center of the star and Hawking radiation that tends to decrease the mass of
the black hole. We study how the assumptions for the accretion rate can in fact
affect the critical mass beyond which a black hole always grows. We also study
to what extent degenerate nuclear matter can impede Hawking radiation due to
the fact that emitted particles can be Pauli blocked at the core of the star.Comment: 9 pages, 2 figure
