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What does<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>μ</mml:mi><mml:mo>−</mml:mo><mml:mi>τ</mml:mi></mml:math>symmetry imply about neutrino mixings?
The requirement of the $\ensuremath{\mu}\ensuremath{-}\ensuremath{\tau}$ symmetry in the neutrino sector that yields the maximal atmospheric neutrino mixing is shown to yield either $\mathrm{sin}{\ensuremath{\theta}}_{13}=0$ (referred to as C1)) or $\mathrm{sin}{\ensuremath{\theta}}_{12}=0$ (referred to as C2)), where ${\ensuremath{\theta}}_{12(13)}$ stands for the solar (reactor) neutrino mixing angle. We study general properties possessed by approximately …