Tests at a Tau/Charm Factory with Longitudinally Polarized Beams

Details Tests at a Tau/Charm Factory with Longitudinally Polarized Beams Tests at a Tau/Charm Factory with Longitudinally Polarized Beams

1996-08-26

arxiv.org/abs/hep-ph/9608439v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, latex, no figures, no external macros. Typos in Eqs.(2,4,5) corrected

Scientific paper

In a recent paper, eight semileptonic parameters were defined to specify the most general Lorentz-invariant spin correlation functions for tau semileptonic decays. The parameters were physically defined in terms of tau-decay partial-width intensities for polarized final states. This paper studies how these parameters can be simply measured at a tau/charm factory with longitudinally polarized beams without using spin-correlation techniques. Thereby the parameters can also be used to bound the effective-mass scales $ \Lambda $ for ``new physics" such as arising from lepton compositeness, leptonic CP violation, leptonic T violation, tau weak magnetism, weak electricity, and/or second-class currents.

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