Split supersymmetry and dark matter generation

Published 24 October 2006 Published under licence by IOP Publishing Ltd
, , Citation Jared Kaplan JHEP10(2006)065 DOI 10.1088/1126-6708/2006/10/065

1126-6708/2006/10/065

Abstract

We analyze a simple Split Supersymmetry scenario where fermion masses come from anomaly mediation, yielding ms ∼ 1000 TeV, m3/2 ∼ 100 TeV, and mf ∼ 1 TeV. We consider non-thermal dark matter production in the presence of moduli, and we find that the decay chains of moduli → LSPs and moduli → gravitinos → 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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10.1088/1126-6708/2006/10/065