Resonant τ leptogenesis with observable lepton number violation -: art. no. 081602

We consider a minimal extension of the standard model with one singlet neutrino per generation that can realize resonant leptogenesis at the electroweak scale. In particular, the baryon asymmetry in the Universe can be created by lepton-to-baryon conversion of an individual lepton number, for example, that of the tau lepton. The current neutrino data can be explained by a simple CP-violating Yukawa texture. The model has several testable phenomenological implications. It contains heavy Majorana neutrinos at the electroweak scale, which can be probed at e(+)e(-) linear colliders, and predicts e- and mu-lepton-number-violating processes, such as 0 nu beta beta decay, mu -> e gamma, and mu-e conversion in nuclei, with rates that are within reach of experimental sensitivity.