Possible astrophysical signatures of heavy stable neutral relics in supergravity models

Details Possible astrophysical signatures of heavy stable neutral relics in supergravity models Possible astrophysical signatures of heavy stable neutral relics in supergravity models

2001-11-23

arxiv.org/abs/hep-ph/0111299v1

Phys.Rev.D65:103519,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages

Scientific paper

10.1103/PhysRevD.65.103519

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 range $10^3 {\rm GeV} \leq m_X \leq 10^{11} {\rm GeV}$. 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 $10^3 {\rm GeV} \leq m_X \leq 10^7 {\rm GeV}$, astrophysical bounds from 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.

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