Baryogenesis via lepton-number-violating scalar interactions

We study baryogenesis through lepton number violation in left-right-symmetric models. In these models the lepton number and $\mathrm{CP}$-violating out-of-equilibrium interactions of the triplet Higgs scalars can give rise to lepton number asymmetry. This in turn generates baryon asymmetry during the electroweak anomalous processes. If these lepton-number-violating interactions are in equilibrium, they can wash out any primordial ($B-L$) asymmetry.