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A new texture of neutrino mass matrix with three constraints

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arxiv 2107.01526 v2 pith:QPPN6I7C submitted 2021-07-04 hep-ph

classification hep-ph
keywords neutrinomassmatrixtexturethreeangleatmosphericcharacteristic
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We present a new texture of neutrino mass matrix having three complex relations among its elements and study in detail the phenomenological implications. A characteristic feature of the resulting neutrino mass matrix is that the atmospheric neutrino mixing angle is predicted to lie in a very narrow region near $45^{\circ}$. We illustrate how such a form of the neutrino mass matrix can be realized using the non-Abelian flavor symmetry $A_4$ in the framework of type-I+II seesaw mechanism.

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