  Interactions that manifest themselves as lepton number violating processes at
low energies in combination with sphaleron transitions typically erase any
pre-existing baryon asymmetry of the Universe. We demonstrate in a model
independent approach that the observation of neutrinoless double beta decay
would impose a stringent constraint on mechanisms of high-scale baryogenesis,
including leptogenesis scenarios. Further, we discuss the potential of the LHC
to model independently exclude high-scale leptogenesis scenarios when observing
lepton number violating processes. In combination with the observation of
lepton flavor violating processes, we can further strengthen this argument,
closing the loophole of asymmetries being stored in different lepton flavors.
