Revisiting Majorana Neutrino Textures in the Light of Dark LMA

Abstract

We study the possibility of texture zeros in Majorana light neutrino mass matrix in the light of dark large mixing angle (DLMA) solution to solar neutrino problem where solar mixing angle (${\sin }^2{\theta }_{12}\simeq 0.7$) lies in the second octant instead of first octant in standard large mixing angle (LMA) scenario (${\sin }^2{\theta }_{12}\simeq 0.3$). In three neutrino scenario, we find that LMA and DLMA solutions lead to different set of allowed and disallowed textures with one and two zeros. While being consistent with existing bounds from neutrino oscillation data, neutrinoless double beta decay and cosmology these allowed textures also lead to interesting correlations among light neutrino parameters which can distinguish LMA from DLMA solution. We also check the implications for texture zeros in $3+1$ neutrino scenario using both LMA and DLMA solutions. While LMA and DLMA solutions do not play decisive role in ruling out texture zeros in this case, they do give rise to distinct predictions and correlations between light neutrino parameters.

arXiv comment37 pages, 10 figures, Journal accepted version

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Cited by in corpus (3)

• Low Scale $U(1{)}_X$ Gauge Symmetry as an Origin of Dark Matter, Neutrino Mass and Flavour Anomalies
• Survey of Texture Zeros with Light Dirac Neutrinos
• Investigating Two-zero Textures of Inverse Neutrino Mass Matrix under the Lamp Post of LMA and LMA-D Solutions and Symmetry Realization