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Leptogenesis in the exceptional supersymmetric standard model: flavour dependent lepton asymmetries

Leptogenesis in the exceptional supersymmetric standard model: flavour dependent lepton asymmetries
Leptogenesis in the exceptional supersymmetric standard model: flavour dependent lepton asymmetries
We calculate flavour dependent lepton asymmetries within the E6 inspired Supersymmetric Standard Model (E6SSM), 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 E6SSM 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 106 GeV.

1-39
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538
Luo, R.
ef33e8b4-300d-4aab-85df-0057412d5b66
Miller, D.J.
a230d4ba-cdd8-4e3b-8d96-3bc31863b7a8
Nevrozov, R.
d0a67f36-faba-4e2d-8896-67b63da6aa9e
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538
Luo, R.
ef33e8b4-300d-4aab-85df-0057412d5b66
Miller, D.J.
a230d4ba-cdd8-4e3b-8d96-3bc31863b7a8
Nevrozov, R.
d0a67f36-faba-4e2d-8896-67b63da6aa9e

King, S.F., Luo, R., Miller, D.J. and Nevrozov, R. (2008) Leptogenesis in the exceptional supersymmetric standard model: flavour dependent lepton asymmetries. Journal of High Energy Physics, 2008 (12), 1-39. (doi:10.1088/1126-6708/2008/12/042).

Record type: Article

Abstract

We calculate flavour dependent lepton asymmetries within the E6 inspired Supersymmetric Standard Model (E6SSM), 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 E6SSM 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 106 GeV.

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e-pub ahead of print date: 23 June 2008
Published date: 11 December 2008
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Identifiers

Local EPrints ID: 144087
URI: http://eprints.soton.ac.uk/id/eprint/144087
DOI: doi:10.1088/1126-6708/2008/12/042
PURE UUID: d37c9c27-db37-4024-9cfc-aa7aaaf652d4

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Date deposited: 26 Apr 2011 13:09
Last modified: 29 Jan 2020 16:20

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Contributors

Author: S.F. King
Author: R. Luo
Author: D.J. Miller
Author: R. Nevrozov

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