Tau Decays Beyond the Standard Model

Details Tau Decays Beyond the Standard Model Tau Decays Beyond the Standard Model

1996-11-05

arxiv.org/abs/hep-ph/9611245v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, latex, no figures Talk at TAU96 workshop

Scientific paper

10.1016/S0920-5632(97)00224-7

In a recent paper, 8 semileptonic parameters were defined to specify the most general Lorentz-invariant spin correlation functions for 2-body tau decays. These parameters can be used to search for anomalous longitudinal-versus transverse polarized-partial widths, for non-CKM-type leptonic CP violation, and for leptonic T violation. They can also be used to bound the effective-mass scales ``Lambda" for new physics arising from additional Lorentz structures, e.g. from lepton compositeness, tau weak magnetism, weak electricity, or second-class currents. It is emphasized that (i) for these tests ``different modes have different merits" and that (ii) the parameters can be measured either by using spin-correlation techniques without polarized beams, or with longitudinally polarized beams.

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