King, S., Luo, R., Miller, D.J. and Nevzorov, R. (2008) Leptogenesis in the Exceptional Supersymmetric Standard Model: flavour dependent lepton asymmetries. Journal of High Energy Physics, 12, (doi: 10.1088/1126-6708/2008/12/042)
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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 |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Miller, Dr David and Nevzorov, Dr Roman and Luo, Mr Rui |
| Authors: | King, S., Luo, R., Miller, D.J., and Nevzorov, R. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Journal of High Energy Physics |
| Publisher: | Springer |
| ISSN: | 1029-8479 |
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