Searching For Anomalous $τνW$ Couplings

Details Searching For Anomalous $τνW$ Couplings Searching For Anomalous $τνW$ Couplings

1997-04-16

arxiv.org/abs/hep-ph/9704337v1

Phys.Rev. D56 (1997) 3074-3080

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 9 figures

Scientific paper

10.1103/PhysRevD.56.3074

The capability of current and future measurements at low and high energy $e^+e^-$ colliders to probe for the existence of anomalous, CP conserving, $\tau \nu W$ dipole moment-type couplings is examined. At present, constraints on the universality of the tau charged and neutral current interactions as well as the shape of the $\tau \to \ell$ energy spectrum provide the strongest bounds on such anomalous couplings. The presence of these dipole moments are shown to influence, e.g., the extraction of $\alpha_s(m_\tau^2)$ from $\tau$ decays and can lead to apparent violations of CVC expectations.

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