Gravitino dark matter in gauge mediated supersymmetry breaking
- Laboratoire de Physique Theorique and Astroparticules, CNRS UMR 5207, Universite Montpellier II, Place E. Bataillon, F-34095 Montpellier Cedex 5 (France)
- Institut d'Astrophysique de Paris, UMR 7095 CNRS, Universite Pierre and Marie Curie, 98 bis boulevard Arago, F-75014 Paris (France)
This paper investigates the parameter space of theories with gauge-mediated supersymmetry breaking leading to gravitino (cold) dark matter with mass m{sub 3/2}{approx}1 keV{yields}10 MeV. We pay particular attention to the cosmological role of messenger fields. Cosmology requires that these messengers decay to the visible sector if the lightest messenger mass M{sub X} > or approx. 30 TeV. We then examine the various possible messenger number violating interactions allowed by the symmetries of the theory and by phenomenology. Late messenger decay generally results in entropy production hence in the dilution of preexisting gravitinos. We find that in SU(5) grand unification only specific messenger-matter couplings allow to produce the required amount of gravitino dark matter particles. Gravitino dark matter with the correct abundance is, however, expected in larger gauge groups such as SO(10) for generic nonrenormalizable messenger-matter interactions and for arbitrarily high post-inflationary reheating temperatures.
- OSTI ID:
- 20776731
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 73, Issue 4; Other Information: DOI: 10.1103/PhysRevD.73.043514; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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