Update on two-zero textures of the Majorana neutrino mass matrix in light of recent T2K, Super-Kamiokande and NO$\nu$A results

Abstract

The latest results from atmospheric and accelerator neutrino experiments indicate that the normal neutrino mass ordering $m_1^{}<m_2^{}<m_3^{}$, a maximal leptonic CP-violating phase $\delta =270^{\circ }$ and the second octant of neutrino mixing angle ${\theta }_{23}^{}>45^{\circ }$ are favored. In light of new experimental results, we update previous phenomenological studies on two-zero textures of the Majorana neutrino mass matrix $M_{\nu }^{}$, in the flavor basis where the charged-lepton mass matrix $M_l^{}$ is diagonal. When the $1\sigma$ ranges of neutrino mixing parameters are taken into account, only four (i.e., ${\mathbf{A}}_{1,2}^{}$ and ${\mathbf{B}}_{2,4}^{}$) among seven two-zero patterns of $M_{\nu }^{}$ show the aforementioned features of neutrino mass spectrum, mixing angle ${\theta }_{23}^{}$ and CP-violating phase $\delta$, and thus are compatible with the latest neutrino oscillation data. The correlative relations among neutrino masses and mixing parameters have been derived analytically for these four patterns, and the allowed regions of neutrino mixing angles and the CP-violating phase are also given. Possible realizations of four viable two-zero textures via non-Abelian discrete flavor symmetries are discussed.

16 pages, 1 figure, references added, to be published in Chin. Phys. C

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Cited by in corpus (34)

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• Seesaw model and two zero flavor neutrino texture
• Neutrino Observables from a U(2) Flavor Symmetry
• Phenomenological Study of Texture Zeros in Lepton Mass Matrices of Minimal Left-Right Symmetric Model
• Further study on the textures of neutrino mass matrix for maximal atmospherical mixing angle and Dirac CP phase
• 3D mapping of the effective Majorana neutrino masses with neutrino oscillation data
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• Neutrino Mass Matrices from Two Zero 3x2 Yukawa Textures and Minimal d=5 Entries
• Implications of ${\delta }_l^{CP}\sim 270^{\circ }$ and ${\theta }_{23}\gtrsim 45^{\circ }$ for texture specific lepton mass matrices and $0\nu \beta \beta$ decay
• Revisiting Majorana Neutrino Textures in the Light of Dark LMA
• Covert symmetries in the neutrino mass matrix
• Theoretical Results on Neutrinos
• Magic square and three-zero textures for Dirac neutrinos
• Is magic texture for Majorana neutrino immanent in Dirac nature?
• Two-zero textures for Dirac Neutrinos
• Modified TM2 for Reproducing All Best-Fit Values of Neutrino Mixing Angles
• Obtaining nonvanishing ${\theta }_{13}$ with constrained neutrino Yukawa matrix and implications for flavor model buildings
• Overview on Neutrino Theory and Phenomenology