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Tipo:	Artigo de Periódico
Título:	Mu-tau reflection symmetry with a high scale texture-zero
Autor(es):	Celso Chikahiro Nishi Bruce Lehmann Sánchez Vega Giovane de Souza Silva
Resumo:	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.
Assunto:	Neutrinos
Idioma:	eng
País:	Brasil
Editor:	Universidade Federal de Minas Gerais
Sigla da Instituição:	UFMG
Departamento:	ICX - DEPARTAMENTO DE FÍSICA
Tipo de Acesso:	Acesso Aberto
Identificador DOI:	https://doi.org/10.1007/JHEP09(2018)042
URI:	http://hdl.handle.net/1843/56555
Data do documento:	2018
metadata.dc.url.externa:	https://link.springer.com/article/10.1007/JHEP09(2018)042
metadata.dc.relation.ispartof:	Journal of High Energy Physics
Aparece nas coleções:	Artigo de Periódico

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