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Comprehensive renormalization group analysis of the littlest seesaw model

Comprehensive renormalization group analysis of the littlest seesaw model
Comprehensive renormalization group analysis of the littlest seesaw model

We present a comprehensive renormalization group analysis of the littlest seesaw model involving two right-handed neutrinos and a very constrained Dirac neutrino Yukawa coupling matrix. We perform the first χ2 analysis of the low energy masses and mixing angles, in the presence of renormalization group corrections, for various right-handed neutrino masses and mass orderings, both with and without supersymmetry. We find that the atmospheric angle, which is predicted to be near maximal in the absence of renormalization group corrections, may receive significant corrections for some nonsupersymmetric cases, bringing it into close agreement with the current best fit value in the first octant. By contrast, in the presence of supersymmetry, the renormalization group corrections are relatively small, and the prediction of a near maximal atmospheric mixing angle is maintained, for the studied cases. Forthcoming results from T2K and NOνA will decisively test these models at a precision comparable to the renormalization group corrections we have calculated.

2470-0010
1-29
Geib, Tanja
709eea41-057b-4457-9350-d697629399a1
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Geib, Tanja
709eea41-057b-4457-9350-d697629399a1
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538

Geib, Tanja and King, Stephen F. (2018) Comprehensive renormalization group analysis of the littlest seesaw model. Physical Review D, 97 (7), 1-29, [075033]. (doi:10.1103/PhysRevD.97.075010).

Record type: Article

Abstract

We present a comprehensive renormalization group analysis of the littlest seesaw model involving two right-handed neutrinos and a very constrained Dirac neutrino Yukawa coupling matrix. We perform the first χ2 analysis of the low energy masses and mixing angles, in the presence of renormalization group corrections, for various right-handed neutrino masses and mass orderings, both with and without supersymmetry. We find that the atmospheric angle, which is predicted to be near maximal in the absence of renormalization group corrections, may receive significant corrections for some nonsupersymmetric cases, bringing it into close agreement with the current best fit value in the first octant. By contrast, in the presence of supersymmetry, the renormalization group corrections are relatively small, and the prediction of a near maximal atmospheric mixing angle is maintained, for the studied cases. Forthcoming results from T2K and NOνA will decisively test these models at a precision comparable to the renormalization group corrections we have calculated.

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PhysRevD.97.075010
Available under License Creative Commons Attribution.
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e-pub ahead of print date: 6 April 2018

Identifiers

Local EPrints ID: 421245
URI: http://eprints.soton.ac.uk/id/eprint/421245
ISSN: 2470-0010
PURE UUID: 47f50e0a-332c-4442-b21f-d53406306845

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Date deposited: 29 May 2018 16:30
Last modified: 16 Dec 2019 18:12

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