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R-parity violation and the cosmological gravitino problem | | G. Moreau
; M. Chemtob
; | | Date: |
27 Jul 2001 | | Journal: | Phys.Rev. D65 (2002) 024033 | | Subject: | hep-ph | | Affiliation: | CPT-CNRS/Marseille) and M. Chemtob (SPhT-CEA/Saclay | | Abstract: | Based on the R-parity violation option of the minimal supersymmetric Standard Model, we examine the scenario where the massive gravitino, relic from the hot big-bang, is the lightest supersymmetric particle and can decay through one or several of the trilinear R-parity violating interactions. We calculate the rates of the gravitino decay via the various three-body decay channels with final states involving three quarks and/or leptons. By taking into account the present constraints on the trilinear R-parity violating coupling constants and assuming the gravitino and scalar superpartner masses do not exceed ${cal O}(10TeV)$, it turns out that the gravitinos could easily have decayed before the present epoch but not earlier than the big-bang nucleosynthesis one. Therefore, the considered scenario would upset the standard big-bang nucleosynthesis and we conclude that it does not seem to constitute a natural solution for the cosmological gravitino problem. | | Source: | arXiv, hep-ph/0107286 | | Services: | Forum | Review | PDF | Favorites | |
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