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Gauged B-L Leptogenesis (1003.0324v1)
Published 1 Mar 2010 in hep-ph
Abstract: We propose a new leptogenesis scenario in a gauged $B-L$ model with supersymmetry at the TeV energy scale. Instead of relying on the very small Yukawa couplings of the singlet neutrinos $Nc$ to generate the observed baryon asymmetry of the Universe, which requires a very large resonance enhancement, their $B-L$ gauge interactions are invoked. Successful leptogenesis is then possible if a particular scalar bilinear $\tilde Nc \tilde Nc$ term is disallowed.
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