New Prediction For Leptonic Theta_13

TL;DR

This paper proposes an extended neutrino model with flavor symmetry that predicts large solar and atmospheric neutrino mixing angles while providing a specific, small value for the mixing angle Theta_13.

Contribution

It introduces a neutrino sector extension with flavor symmetry U(1) x S_4 that yields specific predictions for neutrino mixing angles, including a new formula for Theta_13.

Findings

Predicts Theta_23 =  with flavor symmetry

Provides a new predictive formula for Theta_13 .015

Achieves large solar and atmospheric neutrino mixings

Abstract

An extension of the neutrino sector with two right handed singlet neutrinos responsible for Dirac neutrino masses is discussed. We show that this setup with flavor symmetry can give large solar and atmospheric neutrino mixings and suppressed Theta_13. The flavor symmetry U(1) x S_4 is shown to lead to Theta_23 = \pi/4 and a new predictive formula for the Theta_13(\simeq 0.015).