155 research outputs found

    Revisiting the Quark-Lepton Complementarity and Triminimal Parametrization of Neutrino Mixing Matrix

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    We examine how a parametrization of neutrino mixing matrix reflecting quark-lepton complementarity can be probed by considering phase-averaged oscillation probabilities, flavor composition of neutrino fluxes coming from atmospheric and astrophysical neutrinos and lepton flavor violating radiative decays. We discuss about some distinct features of the parametrization by comparing with the triminimal parametrization of perturbations to tri-bimaximal neutrino mixing matrix.Comment: 9 pages, references adde

    CP violating supersymmetric contributions to the electroweak ρ\rho parameter

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    Effects of CP violation on the supersymmetric electroweak correction to the ρ\rho parameter are investigated. To avoid the EDM constraints, we require that arg(μ)<102(\mu)<10^{-2} and the non-universal trilinear couplings Af=(0,0,A0)A_f=(0,0,A_0) and also assume that gluinos are heavier than 400 GeV. The CP phase ϕt=\phi_t= arg(A0A_0) leads to large enhancement of the relative mass splittings between t~2\tilde{t}_2 and b~L(t~1)\tilde{b}_L(\tilde{t}_1), which in turn reduces the one-loop contribution of the stop and sbottom to Δρ\Delta \rho. For small tanβ\tan \beta, such a CP violating effect is prominent. We also study how much the two-loop gluon and gluino contributions are affected by the CP phase. Possible contributions to the ρ\rho parameter arising from the Higgs sector with CP violation are discussed.Comment: 14 pages, Revtex, 4 eps figures, to appear in Phys. Rev. D (Rapid Comm.