BARYOGENESIS FROM BARYON-NUMBER-VIOLATING SCALAR INTERACTIONS

In the following work we consider the possibility of explaining the ob served baryon-number asymmetry in the universe from simple baryon-numb er-violating modifications, involving massive scalar bosons, to the st andard model. In these cases baryon-number violation is mediated throu gh a combination of Yukawa and scalar self-coupling interactions. Star ting with a previously compiled catalogue of baryon-number-violating e xtensions of the standard model, we identify the minimal subsets which can induce a B-L asymmetry and thus be immune to sphaleron washout. F or each of these models, we identify the region of parameter space tha t leads to the production of a baryon, number asymmetry of the correct order of magnitude.