Superparticle Mass Window from Leptogenesis and Decaying Gravitino Dark Matter

Details Superparticle Mass Window from Leptogenesis and Decaying Gravitino Dark Matter Superparticle Mass Window from Leptogenesis and Decaying Gravitino Dark Matter

2008-09-26

arxiv.org/abs/0809.4667v2

JHEP 0811:079,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 3 figures, published version

Scientific paper

10.1088/1126-6708/2008/11/079

Gravitino dark matter, together with thermal leptogenesis, implies an upper bound on the masses of superparticles. In the case of broken R-parity the constraints from primordial nucleosynthesis are naturally satisfied and decaying gravitinos lead to characteristic signatures in high energy cosmic rays. We analyse the implications for supergravity models with universal boundary conditions at the grand unification scale. Together with low-energy observables one obtains a window of superparticle masses, which will soon be probed at the LHC, and a range of allowed reheating temperatures.

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