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Type:	Artigo de Periódico
Title:	Mu-tau reflection symmetry with a high scale texture-zero
Authors:	Celso Chikahiro Nishi Bruce Lehmann Sánchez Vega Giovane de Souza Silva
Abstract:	The μτ -reflection symmetric neutrino mass matrix can accommodate all known neutrino mixing angles, with maximal atmospheric angle fixed, and predicts all the unknown CP phases of the lepton sector but is unable to predict the absolute neutrino mass scale. Here we present a highly predictive scenario where μτ -reflection is combined with a discrete abelian symmetry to enforce a texture-zero in the mass matrix of the heavy right-handed neutrinos that generate the light neutrino masses. Such a restriction reduces the free parameters of the low energy theory to zero and the absolute neutrino mass scale is restricted to few discrete regions, three in the few meV range and one extending up to around 30 meV. The heavy neutrino sector is dependent only on two free parameters which are further restricted to small regions from the requirement of successful leptogenesis. Mass degenerate heavy neutrinos are possible in one case but there is no resonant enhancement of the CP asymmetry.
Subject:	Neutrinos
language:	eng
metadata.dc.publisher.country:	Brasil
Publisher:	Universidade Federal de Minas Gerais
Publisher Initials:	UFMG
metadata.dc.publisher.department:	ICX - DEPARTAMENTO DE FÍSICA
Rights:	Acesso Aberto
metadata.dc.identifier.doi:	https://doi.org/10.1007/JHEP09(2018)042
URI:	http://hdl.handle.net/1843/56555
Issue Date:	2018
metadata.dc.url.externa:	https://link.springer.com/article/10.1007/JHEP09(2018)042
metadata.dc.relation.ispartof:	Journal of High Energy Physics
Appears in Collections:	Artigo de Periódico

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