Cosmological constraints on the light stable gravitino

Cosmological constraints when the gravitino is the lightest superparticle are studied. From the condition that the relic gravitinos should not overclose the universe, the upper bound on the reheating temperature of the universe is found to be 10 2–10 10 GeV in a range of gravitino mass 10 −5–10 GeV....

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Bibliographic Details
Published inPhysics letters. B Vol. 303; no. 3; pp. 289 - 294
Main Authors Moroi, T., Murayama, H., Yamaguchi, Masahiro
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.04.1993
Elsevier Science
Subjects
Exact sciences and technology
General relativity and gravitation
Physics
Supergravity
Mass
Gravitino
Cosmology
Cross section (collision)
Constraint
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Summary:Cosmological constraints when the gravitino is the lightest superparticle are studied. From the condition that the relic gravitinos should not overclose the universe, the upper bound on the reheating temperature of the universe is found to be 10 2–10 10 GeV in a range of gravitino mass 10 −5–10 GeV. Furthermore, if the decay of the next-to-the-lightest superparticle produces sizable high energy photons, constraints from the light element (D, 3He, 4He) photodestruction exclude a range of the gravitino mass.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(93)91434-O