Testing texture twozero neutrino mass matrices under current experimental scenario
Abstract
The latest data from the Planck Collaboration presented an improved sensitivity limit of the sum of neutrino masses (Σ), Σ <0.17 eV at 95% confidence level (CL). On the other hand, the updated global fits of neutrino oscillation have shown a refined range of atmospheric mixing angle θ_{23} at the same CL. In the light of these observations, we have reinvestigated the five viable cases (B_{1, 2, 3, 4} and C) of the texture twozero Majorana mass matrix in the flavor basis. Using the present Planck's data, we have demonstrated that only cases B_{2} and B_{4} are now viable for normal mass ordering, while the remaining three cases do not meet the present experimental constraints at 2σ CL. The phenomenological predictions of the viable cases are also found to be in tune with the latest T2K, SuperKamiokande and NOνA results, showing the preference for normal neutrino mass ordering (m_{1} < m_{2} < m_{3}), a maximal Dirac CPviolating phase (δ≃ 270°, and the upper octant of the neutrino mixing angle (θ_{23} > 45°). In addition, the implication of Σ on the neutrinoless double beta decay is studied for viable cases.
 Publication:

EPL (Europhysics Letters)
 Pub Date:
 January 2020
 DOI:
 10.1209/02955075/129/11002
 arXiv:
 arXiv:1909.01552
 Bibcode:
 2020EL....12911002S
 Keywords:

 14.60.Pq;
 12.60.i;
 High Energy Physics  Phenomenology
 EPrint:
 10 figures, 2 tables