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

King, S., Luo, R., Miller, D. and Nevzorov, R. (2008) Leptogenesis in the Exceptional Supersymmetric Standard Model: flavour dependent lepton asymmetries. Journal of High Energy Physics, 12,

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## Abstract

We calculate flavour dependent lepton asymmetries within the $E_6$ inspired Supersymmetric Standard Model ($\rm E_6SSM$), 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 $10^6 {GeV}$.

Item Type: Articles Published Yes Luo, Mr Rui and Miller, Dr David and Nevzorov, Dr Roman King, S., Luo, R., Miller, D., and Nevzorov, R. College of Science and Engineering > School of Physics and Astronomy Journal of High Energy Physics Springer 1029-8479 arXiv

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
481951Investigations in Quantum Chromodynamics and Physics Beyond the Standard ModelChristine DaviesScience & Technologies Facilities Council (STFC)ST/G00059X/1Physics and Astronomy
389601A phenomenological investigation of physics beyond the standard model at the next generation of collidersDavid MillerParticle Physics & Astronomy Research Council (PPARC)PP/C 502722/1P&A - PHYSICS & ASTRONOMY