Maximal atmospheric neutrino mixing from texture zeros and quasi-degenerate neutrino masses

Autor(en)

Walter Grimus, Patrick Otto Ludl

Abstrakt

It is well-known that, in the basis where the charged-lepton mass matrix is diagonal, there are seven cases of two texture zeros in Majorana neutrino mass matrices that are compatible with all experimental data. We show that two of these cases, namely B3 and B4 in the classification of Frampton, Glashow and Marfatia, are special in the sense that they automatically lead to near-maximal atmospheric neutrino mixing in the limit of a quasi-degenerate neutrino mass spectrum. This property holds true irrespective of the values of the solar and reactor mixing angles because, for these two cases, in the limit of a quasi-degenerate spectrum, the second and third row of the lepton mixing matrix are, up to signs, approximately complex-conjugate to each other. Moreover, in the same limit the aforementioned cases also develop a maximal CP-violating CKM-type phase, provided the reactor mixing angle is not too small.

Organisation(en)

Teilchenphysik

Journal

Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

Band

700

Seiten

356-361

Anzahl der Seiten

6

ISSN

0370-2693

DOI

https://doi.org/10.1016/j.physletb.2011.05.029

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

103036 Theoretische Physik, 103012 Hochenergiephysik, 103034 Teilchenphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/maximal-atmospheric-neutrino-mixing-from-texture-zeros-and-quasidegenerate-neutrino-masses(718728fe-c1df-40f0-9994-3ae57e57d9fc).html