Quasi-Dirac neutrinos and solar neutrino data

TL;DR

This paper investigates how radiative corrections in a quasi-Dirac neutrino model affect solar neutrino oscillations, constraining parameters like $psilon$ and $m_1$ with data, and finds results consistent with previous studies.

Contribution

It introduces a detailed analysis of solar neutrino data within a quasi-Dirac neutrino framework considering radiative corrections, providing new parameter constraints.

Findings

Allowed range for psilon from 5e-9 to 1e-6

Fourth mass eigenstate m_4 between 0.01 eV and 0.2 eV

Results align with existing literature

Abstract

We present an analysis of the solar neutrino data in the context of a quasi-Dirac neutrino model in which the lepton mixing matrix is given at tree level by the tribimaximal matrix. When radiative corrections are taken into account, new effects in neutrino oscillations, as $\nu_e \to \nu_s$, appear. This oscillation is constrained by the solar neutrino data. In our analysis, we have found an allowed region for our two free parameters $\epsilon$ and $m_1$. The radiative correction, $\epsilon$, can vary approximately from $5\times 10^{-9}$ to $10^{-6}$ and the calculated fourth mass eigenstate, $m_4$, 0.01 eV to 0.2 eV at 2$\sigma$ level. These results are very similar to the ones presented in the literature.