Implications of the Dark LMA solution and Fourth Sterile Neutrino for Neutrino-less Double Beta Decay

Understand

We analyze the effect of the Dark-large mixing angle (DLMA) solution on the effective Majorana mass ($m_{\beta\beta}$) governing neutrino-less double beta decay ($0\nu\beta\beta$) in the presence of a sterile neutrino.

• We consider the 3+1 picture, comprising of one additional sterile neutrino.
• We have checked that the MSW resonance in the sun can take place in the DLMA parameter space in this scenario.
• Next we investigate how the values of the solar mixing angle $\theta_{12}$ corresponding to the DLMA region alter the predictions of $m_{\beta\beta}$ including a sterile neutrino in the analysis.