Leptogenesis Bound on Spontaneous Symmetry Breaking of Global Lepton Number

Details Leptogenesis Bound on Spontaneous Symmetry Breaking of Global Lepton Number Leptogenesis Bound on Spontaneous Symmetry Breaking of Global Lepton Number

2009-09-29

arxiv.org/abs/0909.5468v1

Eur.Phys.J.C71:1560,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures

Scientific paper

10.1140/epjc/s10052-011-1560-2

We propose a new class of leptogenesis bounds on the spontaneous symmetry breaking of global lepton number. These models have a generic feature of inducing new lepton number violating interactions, due to the presence of the Majorons. We analyzed the singlet Majoron model with right-handed neutrinos and find that the lepton number should be broken above 10^5 GeV to realize a successful leptogenesis because the annihilations of the right-handed neutrinos into the massless Majorons and into the standard model Higgs should go out of equilibrium before the sphaleron process is over. We then argue that this type of leptogenesis constraint should exist in the singlet-triplet Majoron models as well as in a class of R-parity violating supersymmetric Majoron models.

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