English

Testing Texture Two Zero Neutrino Mass Matrices Under Current Experimental Scenario

High Energy Physics - Phenomenology 2020-02-21 v2

Abstract

The latest data from Planck collaboration has presented an improved sensitivity limit of the sum of neutrino masses (Σ\Sigma), Σ<0.17eV\Sigma <0.17eV 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 θ23\theta_{23} at the same CL. In the light of these observations, we have re-investigated the five viable cases ( B1,2,3,4B_{1, 2, 3, 4} and CC) of texture two zero Majorana mass matrix in the flavor basis. Using the present Planck's data, we have demonstrated that only cases B2B_{2} and B4B_{4} are now viable for normal mass ordering, while remaining three cases does not meet the present experimental constraints at 2σ\sigma CL. The viable cases are also found to be in agreement with the latest T2K, Super-Kamiokande and NOν\nuA results, indicating the preference for normal neutrino mass ordering (m1<m2<m3m_{1} < m_{2}<m_{3}), a maximal Dirac CP-violating phase (δ2700\delta \simeq 270^{0}), and upper octant of neutrino mixing angle (θ23>450\theta_{23} > 45^{0}). In addition, the implication of Σ\Sigma on neutrinoless double beta decay is studied for viable cases.

Keywords

Cite

@article{arxiv.1909.01552,
  title  = {Testing Texture Two Zero Neutrino Mass Matrices Under Current Experimental Scenario},
  author = {Madan Singh},
  journal= {arXiv preprint arXiv:1909.01552},
  year   = {2020}
}

Comments

10 figures, 2 tables

R2 v1 2026-06-23T11:04:50.100Z