Gravitino production from reheating in split supersymmetry

Abstract

We discuss gravitino production from reheating in models where the splitting between particle and sparticle masses can be larger than TeV, as naturally arising in the context of split supersymmetry. We show that such a production typically dominates over thermal contributions arising from the interactions of gauginos, squarks and sleptons. We constrain the supersymmetry breaking scale of the relevant sector for a given reheat temperature. However the situation changes when the gravitinos dominate the Universe and decay before nucleosynthesis. We briefly describe prospects for a successful baryogenesis and a viable neutralino dark matter in this case.

5 pages, RevTeX4, typos corrected, references added

References in corpus (5)

• Seed perturbations for primordial magnetic fields from MSSM flat directions
• Inflation in large N limit of supersymmetric gauge theories
• Sneutrino condensate as a candidate for the hot big bang cosmology
• Enhanced reheating via Bose condensates
• Leptogenesis as the source of gravitino dark matter and density perturbations

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• Hierarchically Split Supersymmetry with Fayet-Iliopoulos D-terms in String Theory
• Reheating in supersymmetric high scale inflation
• Light Gravitinos at Colliders and Implications for Cosmology
• Virtual effects of light gauginos and higgsinos: a precision electroweak analysis of split supersymmetry
• Non-Canonical Gauge Coupling Unification in High-Scale Supersymmetry Breaking
• Neutrino Mass from R-parity Violation in Split Supersymmetry
• Signals for CP Violation in Split Supersymmetry
• Supersymmetry for Fermion Masses
• Structure of split supersymmetry and simple models
• Hunting long-lived gluinos at the Pierre Auger Observatory
• Distinguishing split supersymmetry in Higgs signals at the Large Hadron Collider
• Infrared fixed point of the top Yukawa coupling in split supersymmetry
• Gravitino Thermal Production, Dark Matter, and Reheating of the Universe
• Vacuum Stability in Split Susy and Little Higgs Models
• Dilepton decays and oscillation of $B_s$ in split supersymmetry with R-parity violation
• Split Supersymmetry in Unified Models
• Reheating, thermalization and non-thermal gravitino production in MSSM inflation
• Heavy Gravitino and Split SUSY in the Light of BICEP2