Implications of the dark large mixing angle solution and a fourth sterile neutrino for neutrinoless double beta decay

We analyze the effect of the dark large mixing angle (DLMA) solution on the effective Majorana mass (m(beta beta)) governing neutrinoless double beta decay (0 nu beta beta) in the presence of a sterile neutrino. We consider the 3 + 1 picture, comprised of one additional sterile neutrino. We check that the Mikheyev-Stnimov-Wolfenstein 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) by including a sterile neutrino in the analysis. We also compare our results with three-generation cases for both standard large mixing angle (LMA) and DLMA. Additionally, we evaluate the discovery sensitivity of the future Xe-136 experiments in this context.