Dark matter, neutron stars and strange quark matter

Details Dark matter, neutron stars and strange quark matter Dark matter, neutron stars and strange quark matter

2010-07-08

arxiv.org/abs/1007.1421v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 2 figures, accepted for publication in Phys. Rev. Lett

Scientific paper

We show that self-annihilating neutralino WIMP dark matter accreted onto neutron stars may provide a mechanism to seed compact objects with long-lived lumps of strange quark matter, or strangelets, for WIMP masses above a few GeV. This effect may trigger a conversion of most of the star into a strange star. We use an energy estimate for the long-lived strangelet based on the Fermi gas model combined with the MIT bag model to set a new limit on the possible values of the WIMP mass that can be especially relevant for subdominant species of massive neutralinos.

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