Leptogenesis in the Exceptional Supersymmetric Standard Model: flavour dependent lepton asymmetries

Abstract

We calculate flavour dependent lepton asymmetries within the $E_6$ inspired Supersymmetric Standard Model (${\mathrm{E}}_6\mathrm{SSM}$), which has an extra $U(1{)}_N$ symmetry. In this model, the right-handed neutrino doesn't participate in gauge interactions, allowing it to be used for both the see--saw mechanism and leptogenesis. Extra Higgs, leptons and leptoquarks predicted by the E${}_6$SSM contribute to the ordinary lepton CP asymmetries induced by the decays of the lightest right--handed neutrino (and sneutrino) and give rise to a set of extra decay asymmetries. We find that the CP asymmetries can be relatively large, even when the lightest right--handed neutrino is as light as $10^{6}GeV$.

40 pages, 9 figures, references added, subsection added

References in corpus (6)

• Gauge Coupling Unification in the Exceptional Supersymmetric Standard Model
• On Resonant Leptogenesis
• Radiatively broken symmetries of nonhierarchical neutrinos
• Predictive model for dark matter, dark energy, neutrino masses and leptogenesis at the TeV scale
• Flavour-Dependent Type II Leptogenesis
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Cited by in corpus (3)

• Neutralino Dark Matter with Inert Higgsinos and Singlinos
• Theoretical Overview of Neutrino Properties
• Generation of Flavour Dependent Lepton Asymmetries in the E${}_6$SSM