Astrophysical bounds on supersymmetric dark-matter Q-balls

Details Astrophysical bounds on supersymmetric dark-matter Q-balls Astrophysical bounds on supersymmetric dark-matter Q-balls

2005-07-09

arxiv.org/abs/astro-ph/0507225v2

JCAP 0508:011,2005

Astronomy and Astrophysics

Astrophysics

10 pages

Scientific paper

10.1088/1475-7516/2005/08/011

Stable baryonic Q-balls, which appear in supersymmetric extensions of the Standard Model, could form at the end of cosmological inflation from fragmentation of the Affleck -- Dine condensate. We reconsider astrophysical constraints on such Q-balls as dark matter candidates. Baryonic Q-balls interact with matter by absorbing the baryon number and, effectively, leading to a rapid baryon number non-conservation. We have recently shown that this process can occur at a much faster rate than that used in previous calculations. As a consequence, stability of neutron stars imposes a stringent constraint on the types of Q-balls that can be dark matter. Only the Q-balls that correspond to baryonic flat directions lifted by baryon-number violating operators are allowed as dark-matter candidates.

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