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Gravitino freeze-in.
- Source :
-
Physical Review D: Particles, Fields, Gravitation & Cosmology . Dec2011, Vol. 84 Issue 11, p115021-1-115021-5. 5p. - Publication Year :
- 2011
-
Abstract
- We explore an alternative mechanism for the production of gravitino dark matter whereby relic gravitinos originate from the decays of superpartners which are still in thermal equilibrium, i.e. vi freeze-in. Contributions to the gravitino abundance from freeze-in can easily dominate over those from thermal scattering over a broad range of parameter space, e.g., when the scalar superpartners are heavy. Because the relic abundance from freeze-in is independent of the reheating temperature alter inflation, collider measurements may be used to unambiguously reconstruct the freeze-in origin of gravitinos. In particular, if gravitino freeze-in indeed accounts for the present day dark matter abundance, then the lifetime of the next-to-lightest superpartner is uniquely fixed by the superpartner spectrum. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 24700010
- Volume :
- 84
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Physical Review D: Particles, Fields, Gravitation & Cosmology
- Publication Type :
- Periodical
- Accession number :
- 72288847
- Full Text :
- https://doi.org/10.1103/PhysRevD.84.115021