LSP baryogenesis and neutron-antineutron oscillations from R-parity violation

R-parity and baryon number violating operators can be allowed in the Super-symmetric Standard Model and thus lead to interesting baryon number violating processes such as n-n oscillations and baryogenesis of the Universe via the decay of the lightest supersymmetric particle (LSP). Adopting the LSP baryogenesis mechanism realized by the late decay of the axino, we identify a single coupling λ 313 ′ ′ as a common origin for the matter-antimatter asymmetry of the Universe as well as potentially observable n-n oscillation rates. From this, rather strong constraints on the supersymmetry breaking masses and the axion decay constant are obtained. The favoured parameter space of λ 313 ′ ′ ∼ 0 . 1 and sub-TeV masses for the relevant sparticles is readily accessible by the current and future LHC searches.