Isocurvature constraints on gravitationally produced superheavy dark matter
Journal Article
·
· Physical Review. D, Particles Fields
- Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
We show that the isocurvature perturbations imply that the gravitationally produced superheavy dark matter must have masses larger than a few times the Hubble expansion rate at the end of inflation. This together with the bound on tensor to scalar contribution to the CMB induces a lower bound on the reheating temperature for superheavy dark matter to be about 10{sup 7} GeV. Hence, if the superheavy dark-matter scenario is embedded in supergravity models with gravity mediated supersymmetry breaking, the gravitino bound will squeeze this scenario. Furthermore, the CMB constraint strengthens the statement that a gravitationally produced superheavy dark-matter scenario prefers a relatively large tensor mode amplitude if the reheating temperature must be less than 10{sup 9} GeV.
- OSTI ID:
- 20711114
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 2 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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