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arxiv: 0705.0219 · v1 · submitted 2007-05-02 · ✦ hep-ph

Determining the Mass for a Light Gravitino

classification ✦ hep-ph
keywords gravitinomassultra-lightbranchingbreakingcosmologicaldecaydetermination
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Gauge mediated supersymmetry breaking scenarios with an ultra-light gravitino of mass m_{3/2}=1-10 eV are very interesting, since there is no cosmological gravitino problem. We propose a new experimental determination of the gravitino mass for such an ultra-light gravitino, by measuring a branching ratio of two decay modes of sleptons.

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