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arXiv · hep-ph/0403183

TeV scale resonant leptogenesis from supersymmetry breaking

Thomas Hambye·John March-Russell·Stephen M. West
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Abstract

We propose a model of TeV-scale resonant leptogenesis based upon recent models of the generation of light neutrino masses from supersymmetry-breaking effects with TeV-scale right-handed (rhd) neutrinos, $N_i$. The model leads to naturally large cosmological lepton asymmetries via the resonant behaviour of the one-loop self-energy contribution to $N_i$ decay. Our model addresses the primary problems of previous phenomenological studies of low-energy leptogenesis: a rational for TeV-scale rhd neutrinos with small Yukawa couplings so that the out-of equilibrium condition for $N_i$ decay is satisfied; the origin of the tiny, but non-zero mass splitting required between at least two $N_i$ masses; and the necessary non-trivial breaking of flavour symmetries in the rhd neutrino sector. The low mass-scale of the rhd neutrinos and their superpartners, and the TeV-scale $A$-terms automatically contained within the model offer opportunities for partial direct experimental tests of this leptogenesis mechanism at future colliders.

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Thomas Hambye, John March-Russell, Stephen M. West. 2004-09-02. TeV scale resonant leptogenesis from supersymmetry breaking. https://doi.org/10.1088/1126-6708%2F2004%2F07%2F070

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