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arXiv · 1003.3401

New decay modes of gravitino dark matter

Ki-Young Choi·Carlos E. Yaguna
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Abstract

We consider the three-body decays of gravitino dark matter in supersymmetric scenarios with bilinear R-parity violation. In particular, gravitino decays into lepton+W^* (lepton f\bar f') and ν+Z^* (νf\bar f) are examined for gravitino masses below Mw. After computing the gravitino decay rates into these three-body final states and studying their dependence on supersymmetric parameters, we find that these new decay modes are often more important than the two-body decay, into a photon and a neutrino, considered in previous works. Consequently, the gravitino lifetime and its branching ratios are substantially modified, with important implications for the indirect detection of gravitino dark matter.

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Ki-Young Choi, Carlos E. Yaguna. 2010-03-17. New decay modes of gravitino dark matter. https://doi.org/10.1103/physrevd.82.015008

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