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Constrained flavor breaking

Thomas Appelquist, Yang Bai, Maurizio Piai Orcid Logo

Physical Review D, Volume: 91, Issue: 9

Swansea University Author: Maurizio Piai Orcid Logo

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DOI (Published version): 10.1103/PhysRevD.91.093009

Abstract

We explore predictive flavor models based on subgroups of the standard-model SU(3)^5 flavor symmetry. Restricting to products of SU(3), we find that a global SU(3)^3 flavor symmetry, broken only by two Yukawa spurions, leads to a relation among down-type quark, up-type quark and charged-lepton Yukaw...

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Published in: Physical Review D
Published: 2015
Online Access: http://arxiv.org/abs/1503.07450
URI: https://cronfa.swan.ac.uk/Record/cronfa20998
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Abstract: We explore predictive flavor models based on subgroups of the standard-model SU(3)^5 flavor symmetry. Restricting to products of SU(3), we find that a global SU(3)^3 flavor symmetry, broken only by two Yukawa spurions, leads to a relation among down-type quark, up-type quark and charged-lepton Yukawa matrices: Yd∝YuYe^+. As a result, the charged-lepton mass ratios are expressed in terms of quark mass ratios and mixing angles. Large leptonic mixing angles appear to be natural and lead to contributions to flavor-changing neutral currents in the charged-lepton sector, which can be tested in future precision experiments.
College: College of Science
Issue: 9