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Neutrino mass and mixing in the seesaw playground

Neutrino mass and mixing in the seesaw playground
Neutrino mass and mixing in the seesaw playground
We discuss neutrino mass and mixing in the framework of the classic seesaw mechanism, involving right-handed neutrinos with large Majorana masses, which provides an appealing way to understand the smallness of neutrino masses. However, with many input parameters, the seesaw mechanism is in general not predictive. We focus on natural implementations of the seesaw mechanism, in which large cancellations do not occur, where one of the right handed neutrinos is dominantly responsible for the atmospheric neutrino mass, while a second right-handed neutrino accounts for the solar neutrino mass, leading to an effective two right-handed neutrino model. We discuss recent attempts to predict lepton mixing and CP violation within such natural frameworks, focussing on the Littlest Seesaw and its distinctive predictions.
hep-ph
0550-3213
456-466
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538

King, Stephen F. (2016) Neutrino mass and mixing in the seesaw playground. Nuclear Physics B, 908, 456-466. (doi:10.1016/j.nuclphysb.2015.12.015).

Record type: Article

Abstract

We discuss neutrino mass and mixing in the framework of the classic seesaw mechanism, involving right-handed neutrinos with large Majorana masses, which provides an appealing way to understand the smallness of neutrino masses. However, with many input parameters, the seesaw mechanism is in general not predictive. We focus on natural implementations of the seesaw mechanism, in which large cancellations do not occur, where one of the right handed neutrinos is dominantly responsible for the atmospheric neutrino mass, while a second right-handed neutrino accounts for the solar neutrino mass, leading to an effective two right-handed neutrino model. We discuss recent attempts to predict lepton mixing and CP violation within such natural frameworks, focussing on the Littlest Seesaw and its distinctive predictions.

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More information

Accepted/In Press date: 23 December 2015
e-pub ahead of print date: 29 December 2015
Published date: July 2016
Additional Information: 12 pages, 5 figures, Invited contribution to the Special Issue on Neutrino Oscillation in order to celebrate the Nobel Prize in Physics 2015 - for publication in Nuclear Physics B
Keywords: hep-ph
Organisations: Theory Group

Identifiers

Local EPrints ID: 410379
URI: http://eprints.soton.ac.uk/id/eprint/410379
ISSN: 0550-3213
PURE UUID: 20a2a8da-6887-4916-8e32-824b74f0419d

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Date deposited: 07 Jun 2017 16:31
Last modified: 02 Dec 2019 19:06

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