The University of Southampton
University of Southampton Institutional Repository

Tri-direct CP in the littlest seesaw playground

Tri-direct CP in the littlest seesaw playground
Tri-direct CP in the littlest seesaw playground

We discuss spontaneously broken CP symmetry in two right-handed neutrino models based on the idea of having a different residual flavour symmetry, together with a different residual CP symmetry, associated with each of the two right-handed neutrinos. The charged lepton sector also has a different residual flavour symmetry. In such a tri-direct CP approach, we show that the combination of the three residual flavour and two residual CP symmetries provides a new way of fixing the parameters. To illustrate the approach, we revisit the Littlest Seesaw (LSS) model based on S4 and then propose new variants which have not so far appeared in the literature, with different predictions for each variant. We analyse numerically the predictions of the new variants, and then propose an explicit model which can realise one of the successful benchmark points, based on the atmospheric flavon vacuum alignment (1, ω2, ω) and the solar flavon vacuum alignment (1, −7/2, −7/2).

Discrete Symmetries, Neutrino Physics
1126-6708
Ding, Gui Jun
65280d32-40be-4950-a54f-f130e4f8699a
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Li, Cai Chang
477970e9-f18d-42db-91f5-ab9099be6705
Ding, Gui Jun
65280d32-40be-4950-a54f-f130e4f8699a
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Li, Cai Chang
477970e9-f18d-42db-91f5-ab9099be6705

Ding, Gui Jun, King, Stephen F. and Li, Cai Chang (2018) Tri-direct CP in the littlest seesaw playground. Journal of High Energy Physics, 2018 (12), [3]. (doi:10.1007/JHEP12(2018)003).

Record type: Article

Abstract

We discuss spontaneously broken CP symmetry in two right-handed neutrino models based on the idea of having a different residual flavour symmetry, together with a different residual CP symmetry, associated with each of the two right-handed neutrinos. The charged lepton sector also has a different residual flavour symmetry. In such a tri-direct CP approach, we show that the combination of the three residual flavour and two residual CP symmetries provides a new way of fixing the parameters. To illustrate the approach, we revisit the Littlest Seesaw (LSS) model based on S4 and then propose new variants which have not so far appeared in the literature, with different predictions for each variant. We analyse numerically the predictions of the new variants, and then propose an explicit model which can realise one of the successful benchmark points, based on the atmospheric flavon vacuum alignment (1, ω2, ω) and the solar flavon vacuum alignment (1, −7/2, −7/2).

Text
Ding2018_Article_Tri-directCPInTheLittlestSeesa - Version of Record
Available under License Creative Commons Attribution.
Download (835kB)

More information

Accepted/In Press date: 20 November 2018
e-pub ahead of print date: 3 December 2018
Published date: December 2018
Keywords: Discrete Symmetries, Neutrino Physics

Identifiers

Local EPrints ID: 427195
URI: http://eprints.soton.ac.uk/id/eprint/427195
ISSN: 1126-6708
PURE UUID: 33a4bffa-977a-4e3e-8166-5280fff59cac

Catalogue record

Date deposited: 07 Jan 2019 17:30
Last modified: 07 Oct 2020 00:36

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.

×