Leptogenesis with exclusively low-energy CP Violation in the Context of Minimal Lepton Flavour Violation

Abstract

We analyze lepton flavour violation (LFV) and the generation of the observed baryon-antibaryon asymmetry of the Universe (BAU) within a generalized minimal lepton flavour violation framework with three quasi-degenerate heavy Majorana neutrinos. The BAU which is obtained through radiative resonant leptogenesis can successfully be generated widely independent of the Majorana scale in this scenario and flavour effects are found to be relevant. Then we discuss the specific case in which CP violation is exclusively present at low-energies (a real R matrix) in the flavour sensitive temperature regime. Successful leptogenesis in this case leads to strong constraints on low-energy neutrino parameters.

arXiv commentContrubution to the proceedings of the EPS HEP 2007 conference, Manchester (UK). 3 pages, 3 figures

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