Searching For Anomalous $\tau \nu W$ Couplings

Abstract

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.

24 pages, 9 figures

References in corpus (1)

• Measurement of the Tau Neutrino Helicity and the Michel Parameters in Polarized e+e- Collisions

Cited by in corpus (11)

• Model independent bounds on the tau lepton electromagnetic and weak magnetic moments
• U(2)^5 flavor symmetry and lepton universality violation in W -> tau nu_tau
• Anomalous Single Production of the Fourth Generation Quarks at the LHC
• Anomalous charged current couplings of the tau and implications for tau compositeness and two-Higgs doublet models
• Weak Magnetic Dipole Moments in the MSSM
• Effective CP-violating operators of the tau lepton and some of their phenomenologies
• Possible Single Resonant Production of the Fourth Generation Charged Leptons at $\gamma e$ Colliders
• Anomalous Single Production of the Fourth Generation Neutrino at Future ep Colliders
• Possibility of Searching for Fourth Generation Neutrino at Future ep Colliders
• Effect of the excited and fourth generation leptons in lepton flavor violating μ^{-} \to e^{-}2γdecay
• Searching for Single Production of Charged Heavy Leptons via Anomalous Interactions at CLIC