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arXiv · hep-ph/9611245

Tau Decays Beyond the Standard Model

Charles A. Nelson
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Abstract

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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Charles A. Nelson. 1996-11-05. Tau Decays Beyond the Standard Model. https://doi.org/10.1016/s0920-5632(97)00224-7

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