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

Allahverdi, Rouzbeh and Enqvist, Kari and Mazumdar, Anupam (2002) Possible astrophysical signatures of heavy stable neutral relics in supergravity models. Physical Review D, 65 (10). ISSN 1550-7998

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PhysRevD.65.103519.pdf - Published Version

## 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 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.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D