Determination of Neutrino Mass Texture for Maximal CP Violation

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dc.creatorAizawa, Ichiro
dc.creatorKitabayashi, Teruyuki
dc.creatorYasue, Masaki
dc.date2005-07-29
dc.date2005-09-14
dc.date.accessioned2026-07-07T11:26:45Z
dc.date.available2026-07-07T11:26:45Z
dc.descriptionWe show a general form of neutrino mass matrix (M), whose matrix elements are denoted by M_{ij} (i.j=e, mu, tau) as flavor neutrino masses, that induces maximal CP violation as well as maximal atmospheric neutrino mixing. The masses of M_{mu mu}, M_{tau tau} and M_{mu tau}+sigma M_{ee} (sigma =\pm 1) turn out to be completely determined by M_{e mu} and M_{e tau} for given mixing angles. The appearance of CP violation is found to originate from the interference between the mu-tau symmetric part of M and its breaking part. If |M_{e mu}|=|M_{e tau}|, giving either M_{e mu}=-sigma e^{i theta} M_{e tau} or M_{e mu}=-sigma e^{i theta}M*_{e tau} with a phase parameter theta, is further imposed, we find that |M_{mu mu}|=|M_{tau tau}|is also satisfied. These two constraints can be regarded as an extended version of the constraints in the mu-tau symmetric texture given by M_{e mu}=-sigma M_{e tau} and M_{mu mu}=M_{tau tau}. Majorana CP violation becomes active if arg(M_{mu tau})\neq arg(M_{e mu})+theta/2 for M_{e mu}=-sigma e^{i theta} M_{e tau} and if arg(M_{mu tau})\neq theta/2 for M_{e mu}=-sigma e^{i theta} M*_{e tau}.
dc.description10 pages, RevTex, typos corrected, minor clarifications added in Sec.3 and Sec.4, version to appear in Nucl. Phys. B
dc.identifierhttps://arxiv.org/abs/hep-ph/0507332
dc.identifierhttp://arxiv.org/abs/hep-ph/0507332
dc.identifierNucl.Phys.B728:220-232,2005
dc.identifierdoi:10.1016/j.nuclphysb.2005.09.016
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195931
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDetermination of Neutrino Mass Texture for Maximal CP Violation
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