The University of Southampton
University of Southampton Institutional Repository

A new Littlest Seesaw model

A new Littlest Seesaw model
A new Littlest Seesaw model
We propose and discuss a new Littlest Seesaw model, realized in the tri-direct CP approach, in which the couplings of the two right-handed neutrinos to the lepton doublets are proportional to (0, −1, 1) and (1,5/2, −1/2) respectively with the relative phase η = −π/2. This model can give an excellent description of lepton flavour mixing, including an atmospheric neutrino mixing angle in the second octant, in terms of only two input parameters. We show that the observed baryon asymmetry can be generated for the lightest right-handed neutrino mass M 1 = 1.176 × 1011 GeV in SM and M 1 = 3.992 × 1010 GeV in MSSM with $\tan \beta =5$. We construct an explicit Littlest Seesaw model based on the flavour symmetry S 4 × Z 5 × Z 8 in which the desired alignments and the phase η = −π/2 are achieved.
CP violation, discrete symmetries, model building, neutrino physics
0954-3899
Chen, Ping-Tao
cf9ffb38-0e56-4800-8035-09925dd69358
Ding, Gui-Jun
65280d32-40be-4950-a54f-f130e4f8699a
King, Stephen
f8c616b7-0336-4046-a943-700af83a1538
Li, Cai-Chang
477970e9-f18d-42db-91f5-ab9099be6705
Chen, Ping-Tao
cf9ffb38-0e56-4800-8035-09925dd69358
Ding, Gui-Jun
65280d32-40be-4950-a54f-f130e4f8699a
King, Stephen
f8c616b7-0336-4046-a943-700af83a1538
Li, Cai-Chang
477970e9-f18d-42db-91f5-ab9099be6705

Chen, Ping-Tao, Ding, Gui-Jun, King, Stephen and Li, Cai-Chang (2020) A new Littlest Seesaw model. Journal of Physics G: Nuclear and Particle Physics, 47 (6), [065001]. (doi:10.1088/1361-6471/ab7e8d).

Record type: Article

Abstract

We propose and discuss a new Littlest Seesaw model, realized in the tri-direct CP approach, in which the couplings of the two right-handed neutrinos to the lepton doublets are proportional to (0, −1, 1) and (1,5/2, −1/2) respectively with the relative phase η = −π/2. This model can give an excellent description of lepton flavour mixing, including an atmospheric neutrino mixing angle in the second octant, in terms of only two input parameters. We show that the observed baryon asymmetry can be generated for the lightest right-handed neutrino mass M 1 = 1.176 × 1011 GeV in SM and M 1 = 3.992 × 1010 GeV in MSSM with $\tan \beta =5$. We construct an explicit Littlest Seesaw model based on the flavour symmetry S 4 × Z 5 × Z 8 in which the desired alignments and the phase η = −π/2 are achieved.

Text
A new Littlest Seesaw model - Accepted Manuscript
Restricted to Repository staff only until 9 April 2021.
Request a copy

More information

Accepted/In Press date: 10 March 2020
e-pub ahead of print date: 9 April 2020
Keywords: CP violation, discrete symmetries, model building, neutrino physics

Identifiers

Local EPrints ID: 440999
URI: http://eprints.soton.ac.uk/id/eprint/440999
ISSN: 0954-3899
PURE UUID: 3e3636a2-94cc-4110-9324-8a19c2875f53

Catalogue record

Date deposited: 27 May 2020 16:53
Last modified: 08 Oct 2020 16:35

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×