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Leptogenesis: Maki-Nakagawa-Sakata link in unified models with natural neutrino mass hierarchy

Leptogenesis: Maki-Nakagawa-Sakata link in unified models with natural neutrino mass hierarchy
Leptogenesis: Maki-Nakagawa-Sakata link in unified models with natural neutrino mass hierarchy
We discuss the relation between leptogenesis and the Maki-Nakagawa-Sakata (MNS) phases in the class of seesaw models called light sequential dominance in which the right-handed neutrinos dominate sequentially, with the dominant right-handed neutrino being the lightest one. The heaviest right-handed neutrino then decouples, leaving effectively two right-handed neutrinos. Light sequential dominance is motivated by SO(10) models which predict three right-handed neutrinos. With an approximate Yukawa texture zero in the 11 position there are only two seesaw phases which are simply related to the MNS phase measurable at a neutrino factory and the leptogenesis phase. The leptogenesis phase is predicted to be equal to the neutrinoless double beta decay phase.
1550-7998
113010-[4pp]
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538

King, S.F. (2003) Leptogenesis: Maki-Nakagawa-Sakata link in unified models with natural neutrino mass hierarchy. Physical Review D, 67 (11), 113010-[4pp]. (doi:10.1103/PhysRevD.67.113010).

Record type: Article

Abstract

We discuss the relation between leptogenesis and the Maki-Nakagawa-Sakata (MNS) phases in the class of seesaw models called light sequential dominance in which the right-handed neutrinos dominate sequentially, with the dominant right-handed neutrino being the lightest one. The heaviest right-handed neutrino then decouples, leaving effectively two right-handed neutrinos. Light sequential dominance is motivated by SO(10) models which predict three right-handed neutrinos. With an approximate Yukawa texture zero in the 11 position there are only two seesaw phases which are simply related to the MNS phase measurable at a neutrino factory and the leptogenesis phase. The leptogenesis phase is predicted to be equal to the neutrinoless double beta decay phase.

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Submitted date: 22 November 2002
Published date: 26 June 2003

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Local EPrints ID: 57362
URI: http://eprints.soton.ac.uk/id/eprint/57362
ISSN: 1550-7998
PURE UUID: eb26f935-fb02-44ee-8c1a-d5066cc84485

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Date deposited: 14 Aug 2008
Last modified: 13 Mar 2019 20:34

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Author: S.F. King

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