85 research outputs found

    CP-odd weak basis invariants and texture zeros

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    We construct the CP-odd weak basis invariants from the neutrino mass matrix in a weak basis in which the charged lepton mass matrix is diagonal and find the necessary and sufficient conditions for CP conservation. We study the interrelationships between different CP-odd weak basis invariants to examine their implications for the Dirac and Majorana type CP violating phases for the phenomenologically allowed Frampton-Glashow-Marfatia texture zero structures of the neutrino mass matrix.Comment: 9 pages, three tables, Phys. Rev. D (to appear

    Quark-lepton complementarity model based predictions for θ23PMNS\theta_{23}^{PMNS} with neutrino mass hierarchy

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    After the successful investigation and confirmation of non zero θ13PMNS\theta_{13}^{PMNS} by various experiments, we are standing at a square where we still encounter a number of issues, which are to be settled. In this paper, we have extended our recent work towards a precise prediction of the θ23PMNS\theta_{23}^{PMNS} mixing angle, taking into account the neutrino mass hierarchy. We parameterize the non-trivial correlation between quark (CKM) and lepton (PMNS) mixing matrices in quark-lepton complementarity (QLC) model as Vc=UCKM.ψ.UPMNSV_{c}= U_{CKM}. \psi. U_{PMNS}, where ψ\psi is a diagonal phase matrix. Monte Carlo simulations are used to estimate the texture of VcV_{c} and compare the results with the standard Tri-Bi-Maximal (TBM) and Bi-Maximal(BM) structures of neutrino mixing matrix. We have predicted the value of θ23PMNS\theta_{23}^{PMNS} for normal and inverted neutrino mass hierarchies. The value of θ23PMNS\theta_{23}^{PMNS} obtained for two cases are about 1.3σ1.3\sigma away from each other, implying the better precision can give us a strong hint for the type of neutrino mass hierarchy.Comment: 3 pages, 3 figure

    Model Independent Constraints on Non-electronic Flavors in the Solar Boron Neutrino Flux

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    We perform the most general model independent analysis of the latest 391-Day Salt Phase SNO Data Set incorporating the Super-Kamiokande ES flux measurement and obtain bounds on the antineutrino and sterile neutrino flux in the solar 8^{8}B neutrino flux reaching the detectors on the earth. The muon/ tauon antineutrino flux is found to be disallowed at 1.4σ\sigma C.L. The sterile flux is found to be non-zero at about 1.26 standard deviations.Comment: 8 pages and no figur