Dark Matter Generation and Split Supersymmetry

Abstract

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.

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

References in corpus (7)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• The Well-Tempered Neutralino
• Neutralino with the Right Cold Dark Matter Abundance in (Almost) Any Supersymmetric Model
• Moduli-Induced Gravitino Problem
• Gravitino Production from Heavy Moduli Decay and Cosmological Moduli Problem Revived
• Moduli Decays and Gravitinos
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Cited by in corpus (8)

• In Wino Veritas? Indirect Searches Shed Light on Neutralino Dark Matter
• Accurate estimate of the relic density and the kinetic decoupling in non-thermal dark matter models
• The Spectrum of the Axion Dark Sector
• Mitigating Moduli Messes in Low-Scale SUSY Breaking
• Confronting the Moduli-Induced LSP Problem
• Moduli or Not
• The Axiverse induced Dark Radiation Problem
• SUSY's Ladder: Reframing Sequestering at Large Volume