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New type of complex neutrino mass texture and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>μ</mml:mi><mml:mtext mathvariant="normal">−</mml:mtext><mml:mi>τ</mml:mi></mml:math>symmetry
Relying upon the usefulness of the $\ensuremath{\mu}\mathrm{\text{\ensuremath{-}}}\ensuremath{\tau}$ symmetry, we find a new type of neutrino mass texture with a single phase parameter $\ensuremath{\delta}$ that describes maximal atmospheric neutrino mixing and Dirac $CP$ violation due to the presence of $\ensuremath{\delta}$. The Majorana phase associated with the third massive neutrino turns out …