München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 22: Theoretische Astroteilchenphysik und Kosmologie 1

T 22.3: Talk

Monday, March 9, 2009, 17:30–17:45, M114

Neutrino Signals from Unstable Gravitino Dark Matter — •Michael Grefe — DESY, Theory Group, Notkestraße 85, D-22603 Hamburg

The gravitino is a promising supersymmetric dark matter candidate, which does not require exact R-parity conservation. In fact, even with some small R-parity breaking, gravitinos are sufficiently long-lived to constitute the dark matter of the universe, while yielding a cosmological scenario consistent with primordial nucleosynthesis and the high reheating temperature required for thermal leptogenesis.

In this talk we discuss the neutrino flux from direct gravitino decay in a simple scenario with bilinear R-parity breaking and have a look at the possibility to detect such signal in present and future neutrino experiments. If detected, this distinctive signal might bring significant support to the scenario of decaying gravitino dark matter.

(Based on arXiv:0809.5030.)