Baryogenesis with superheavy squarks

We consider a set-up 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 1011 GeV, while neutralino dark matter induces a stronger bound of 1013 GeV. Some mass splitting between left- and right-handed squarks may be needed to also satisfy constraints from gluino cosmology.