Single-W production to test triple gauge boson couplings at LEP

Abstract

We present a study of single-W production ($e^{+}{e}^{-}\to e^{-}{\bar{\nu }}_e{W}^{+}$) as a new probe of the anomalous couplings at the LEP energy region. We introduce simple cuts to separate the single-W process from W-pair production and have performed cross-section calculations using 4-fermion generator ``grc4f''. The cross-section of the single-W process is found to be large enough to detect at LEP experiments in the near future. In addition, a high sensitivity to the anomalous coupling of the $WW\gamma$ vertex is expected since the amplitude of the $WW\gamma$ diagram makes a dominant contribution in this process. We have found that the cross-section measurement of the single-W process in the LEP2 energy region can give complementary bounds on the anomalous couplings to those obtained from W-pair analysis.

revised version, to appear in Physics Letters B

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Cited by in corpus (3)

• Unstable Particles and Non-Conserved Currents: a Generalization of the Fermion-Loop Scheme
• Production of Single W Bosons at LEP and Measurement of WWgamma Gauge Coupling Parameters
• Production of Single W Bosons at \sqrt{s}=189 GeV and Measurement of WWgamma Gauge Couplings