Azimuthal Angle Probe of Anomalous HWW Couplings at the LHeC

Abstract

A high energy ep collider, such as the proposed LHeC, possesses the unique facility of permitting direct measurement of the HWW coupling without contamination from the HZZ coupling. At such a machine, the fusion of two W bosons through the HWW vertex would give rise to typical charged current (CC) events accompanied by a Higgs boson. We demonstrate that azimuthal angle correlations between the observable CC final states could then be a sensitive probe of the nature of the HWW vertex and hence of the CP properties of the Higgs boson.

Revised version to appear in Physical Review Letters, some typos and mis-labellings corrected, references reorganised and updated