Neutrino masses, cosmological bound and four zero Yukawa textures

Details Neutrino masses, cosmological bound and four zero Yukawa textures Neutrino masses, cosmological bound and four zero Yukawa textures

2011-03-03

arxiv.org/abs/1103.0665v2

Mod. Phys. Lett. A, 26 (2011) 2427

Physics

High Energy Physics

High Energy Physics - Phenomenology

Published version

Scientific paper

Four zero neutrino Yukawa textures in a specified weak basis, combined with $\mu\tau$ symmetry and type-I seesaw, yield a highly constrained and predictive scheme. Two alternately viable $3\times3$ light neutrino Majorana mass matrices $m_{\nu A}/m_{\nu B}$ result with inverted/normal mass ordering. Neutrino masses, Majorana in character and predicted within definite ranges with laboratory and cosmological inputs, will have their sum probed cosmologically. The rate for $0\nu\beta\beta$ decay, though generally below the reach of planned experiments, could approach it in some parameter region. Departure from $\mu\tau$ symmetry due to RG evolution from a high scale and consequent CP violation, with a Jarlskog invariant whose magnitude could almost reach $6\times 10^{-3}$, are explored.

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