8,458 research outputs found

    Anomalous Magnetic and Electric Dipole Moments of the Tau

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    This paper reviews the theoretical predictions for and the experimental measurements of the anomalous magnetic and electric dipole moments of the tau lepton. In particular, recent analyses of the \eettg process from the L3 and OPAL collaborations are described. The most precise results, from L3, for the anomalous magnetic and electric dipole moments respectively are: \atau = 0.004 \pm 0.027 \pm 0.023 and \dtau = (0.0 \pm 1.5 \pm 1.3)\times 10^{-16}{e{\cdot}\mathrm{cm}}.Comment: Invited talk at the TAU'98 Workshop, 14-17 September 1998, Santander, Spai

    Properties of the W boson

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    The properties of the W boson are reviewed. Particular emphasis is placed on recent measurements from the LEP2 and Tevatron experiments.Comment: To appear in the Proceedings of the XVIIth International Conference on Physics in Collision, 1997, Ed. H. Heath, World Scientific, Singapor

    New constraints on the tau neutrino mass and fourth generation mixing

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    We present new constraints on the mass mντm_{\nu_\tau} of the tau neutrino and its mixing with a fourth generation neutrino. From an analysis of the partial widths of tau lepton decays we obtain the following bounds at the 90% confidence level: mντ<32m_{\nu_\tau} < 32 MeV and sin2θ<0.007\sin^2\theta < 0.007, where θ\theta describes the Cabibbo-like mixing of the third and fourth generation neutrinos.Comment: 2 pages, no figures. Submitted to Phys. Rev.

    On the use of Satellite Television in High Energy Physics

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    This paper assesses the feasibility of exploiting commercial satellite television technologies to broadcast video signals and data from major High Energy Physics facilities to collaborating institutes throughout the world.Comment: Invited talk at CHEP'98, Chicago, USA, August 31 - September 4, 199

    Sensitivities of one-prong tau branching fractions to tau neutrino mass, mixing, and anomalous charged current couplings

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    We analyse the sensitivities of exclusive one-prong tau branching fractions to: the tau neutrino mass; its mixing with a fourth generation neutrino; the weak charged current magnetic and electric dipole moments of the tau; and the Michel parameter η\eta. Quantitative constraints are derived from current experimental data and the future constraints derivable from tau-charm factory measurements are estimated. The anomalous coupling constraints are used to constrain the tau compositeness scale and the allowed parameter space for Higgs doublet models.Comment: Invited talk at the Tau-Charm Workshop, 6-9 March 1999, SLAC, US