Dark Matter Generation and Split Supersymmetry

Details Dark Matter Generation and Split Supersymmetry Dark Matter Generation and Split Supersymmetry

2006-01-31

arxiv.org/abs/hep-ph/0601262v3

JHEP 0610:065,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

V1: 14 p, 1 fig; V2: 19 p, 1 fig, significant additions, references added V3: Matching JHEP

Scientific paper

10.1088/1126-6708/2006/10/065

We analyze a simple Split Supersymmetry scenario where fermion masses come from anomaly mediation, yielding m_s ~ 1000 TeV, m_{3/2} ~ 100 TeV, and m_f ~ 1 TeV. We consider non-thermal dark matter production in the presence of moduli, and we find that the decay chains of moduli to LSPs and moduli to gravitinos to LSPs generate dark matter more efficiently than perturbative freeze-out, allowing for a light, LHC visible spectrum. These decaying moduli can also weaken cosmological constraints on the axion decay constant. With squark masses of order 1000 TeV, LHC gluinos will decay millimeters from their primary vertices, resulting in a striking experimental signature, and the suppression of Flavor Changing Neutral Currents is almost sufficient to allow arbitrary mixing in squark mass matrices.

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