Abstract
We consider heavy stable neutral particles in the context of supergravity and show that a gravitationally suppressed inflaton decay can produce such particles in cosmologically interesting abundances within a wide mass range103GeV<~mX <~1011 GeV. In gravity-mediated supersymmetry breaking models, a heavy particle can decay into its superpartner and a photon-photino pair or a gravitino. Such decays only change the identity of a possible dark matter candidate. However, for 103 GeV<~mx<~107 GeV, astrophysical bounds from a gamma-ray background and photodissociation of light elements can be more stringent than the overclosure bound, thus ruling out the particle as a dark matter candidate.
Original language | English |
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Article number | 103519 |
Number of pages | 7 |
Journal | Physical Review D |
Volume | 65 |
Issue number | 10 |
DOIs | |
Publication status | Published - May-2002 |
Externally published | Yes |