Probing the Glashow resonance at electron-positron colliders

Abstract

We investigate here a possible contribution of the Glashow resonance to the channel \(e^+e^-\rightarrow~W^+W^-\). By extending the method of the effective (equivalent) particles to the neutral leptons, we relate the distribution of the effective neutrinos in the electron to the total cross section for \(e^+e^-\rightarrow~W^+W^-\). Our approach gives a good fit to existing experimental data measured at the electron-positron collider LEP at CERN and allows one to interpret these measurements as an observation of the Glashow resonance.