Implications of μ-τ flavored CP symmetry of leptons

We discuss gauge models incorporating mu-tau flavored CP symmetry (called CP mu tau in the text) in combination with L-mu - L-tau invariance to understand neutrino mixings and discuss their phenomenological implications. We show that viable leptogenesis in this setting requires that the lightest right-handed neutrino mass must be between 10(9)-10(12) GeV and for effective two hierarchical right-handed neutrinos, leptogenesis takes place only in a narrower range of 5 x 10(10)-10(12) GeV. A multi-Higgs realization of this idea implies that there must be a pseudoscalar Higgs boson with mass less than 300 GeV. Generically, the vev alignment problem can be naturally avoided in our setting.