Probing WWγ coupling through e−γ → νeW− at ILC

Abstract

The anomalous [Formula: see text] coupling is probed through [Formula: see text] at the ILC. With a spectacular single lepton final state, this process is well suited to study the above coupling. Cross-section measurements can probe [Formula: see text] to about [Formula: see text] for a luminosity of 100 fb[Formula: see text] at 500 GeV center-of-mass energy with unpolarized electron beam. The limits derivable on [Formula: see text] from the total cross-section are comparatively more relaxed. Exploiting the energy-angle double distribution of the secondary muons, kinematic regions sensitive to these couplings are identified. The derivable limit on [Formula: see text] could be improved to a few per-mil, focusing on such regions. More importantly, the angular distributions at fixed energy values, and energy distribution at fixed angles present very interesting possibility of distinguishing the case of [Formula: see text] and [Formula: see text].