Baryogenesis with Superheavy Squarks

Abstract

We consider a setup where R-parity is violated in the framework of split supersymmetry. The out-of-equilibrium decays of heavy squarks successfully lead to the generation of a baryon asymmetry. We restrict the R-parity violating couplings to the baryon number violating subset to keep the neutralino sufficiently stable to provide the dark matter. The observed baryon asymmetry can be generated for squark masses larger than 10^11 GeV, while neutralino dark matter induces a stronger bound of 10^13 GeV. Some mass splitting between left- and right-handed squarks may be needed to satisfy also constraints from gluino cosmology.

18 pages, LaTeX, 4 figures

References in corpus (8)

• Aspects of Split Supersymmetry
• Split Supersymmetry
• Dark Matter in the Finely Tuned Minimal Supersymmetric Standard Model
• Split Supersymmetry at Colliders
• R-parity violation in split supersymmetry
• How large could the R-parity violating couplings be?
• Smallness of Baryon Asymmetry from Split Supersymmetry
• Supermassive gravitinos, dark matter, leptogenesis and flat direction baryogenesis

Cited by in corpus (4)

• The Baryogenesis Window in the MSSM
• The Effective Theory of the Light Stop Scenario
• Decaying neutralino dark matter in anomalous $U(1{)}_H$ models
• Supersymmetric Baryogenesis from Exotic Quark Decays