73,895 research outputs found

    Compositeness Effects in the Anomalous Weak-Magnetic Moment of Leptons

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    We investigate the effects induced by excited leptons, at the one-loop level, in the anomalous magnetic and weak-magnetic form factors of the leptons. Using a general effective Lagrangian approach to describe the couplings of the excited leptons, we compute their contributions to the weak-magnetic moment of the τ\tau lepton, which can be measured on the ZZ peak, and we compare it with the contributions to gμ2g_\mu - 2, measured at low energies.Comment: Latex File using Rev Tex. 16 pages 5 .eps figure

    Dynamic cyclic performance of phenol-formaldehyde resin derived carbons for pre-combustion CO2 capture : An experimental study

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    Acknowledgments This work was carried out with financial support from the Spanish MINECO (Project ENE2011-23467), co-financed by the European Regional Development Fund (ERDF).Peer reviewedPublisher PD

    Axioms for consensus functions on the n-cube

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    An elementary general result is proved that allows for simple characterizations of well-known location/consensus functions (median, mean and center) on the n-cube. In addition, alternate new characterizations are given for the median and anti-median functions on the n-cube.Comment: 12 page

    On the Interpretation of the Atmospheric Neutrino Data in Terms of Flavor Changing Neutrino Interactions

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    Flavour changing (FC) neutrino-matter interactions have been proposed as a solution to the atmospheric neutrino anomaly. Here we perform the analysis of the full set of the recent 52 kTy Super-Kamiokande atmospheric neutrino data, including the zenith angle distribution of the contained events as well as the higher energy upward-going stopping and through-going muon events. Our results show that the FC mechanism can describe the full data sample with a chi^2_{min}=44/(33 d.o.f) which is acceptable at the 90% confidence level. The combined analysis confines the amount of FC to be either close to maximal or to the level of about (10-50)%.Comment: 15 pages, 4 Postscript figures, uses ReVTeX. Updated analysis to 52 kTy Super-Kamiokande data. A new figure for the up-down asymmetry is included. Some comments and references are adde

    Global three-neutrino oscillation analysis of neutrino data

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    A global analysis of the solar, atmospheric and reactor neutrino data is presented in terms of three-neutrino oscillations. We include the most recent solar neutrino rates of Homestake, SAGE, GALLEX and GNO, as well as the recent 1117 day Super-Kamiokande data sample, including the recoil electron energy spectrum both for day and night periods and we treat in a unified way the full parameter space for oscillations, correctly accounting for the transition from the matter enhanced (MSW) to the vacuum oscillations regime. Likewise, we include in our description conversions with θ12>π/4\theta_{12} > \pi/4. For the atmospheric data we perform our analysis of the contained events and the upward-going ν\nu-induced muon fluxes, including the previous data samples of Frejus, IMB, Nusex, and Kamioka experiments as well as the full 71 kton-yr (1144 days) Super-Kamiokande data set, the recent 5.1 kton-yr contained events of Soudan2 and the results on upgoing muons from the MACRO detector. We first present the allowed regions of solar and atmospheric oscillation parameters θ12\theta_{12}, Δm212\Delta m^2_{21} and θ23\theta_{23}, Δm322\Delta m^2_{32}, respectively, as a function of θ13\theta_{13} and determine the constraints from atmospheric and solar data on the mixing angle θ13\theta_{13}, common to solar and atmospheric analyses. We also obtain the allowed ranges of parameters from the full five-dimensional combined analysis of the solar, atmospheric and reactor data.Comment: 56 pages, 21 postscript figures. Some misprints corrected and new references added. Chooz limit included in Fig.21. Final version to appear in Phys. Rev.
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