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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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    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: Article
    Journal or Publication Title: Physical Review D
    Additional Information: © 2002 The American Physical Society 12 pages
    Subjects:
    Departments: Faculty of Science and Technology > Physics
    ID Code: 63454
    Deposited By: ep_importer_pure
    Deposited On: 03 May 2013 10:21
    Refereed?: Yes
    Published?: Published
    Last Modified: 19 Sep 2017 04:40
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/63454

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