TY - JOUR

T1 - Possible astrophysical signatures of heavy stable neutral relics in supergravity models

AU - Allahverdi, Rouzbeh

AU - Enqvist, Kari

AU - Mazumdar, Anupam

N1 - © 2002 The American Physical Society 12 pages

PY - 2002/5/14

Y1 - 2002/5/14

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevD.65.103519

DO - 10.1103/PhysRevD.65.103519

M3 - Journal article

VL - 65

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 10

M1 - 103519

ER -