Azimuthal Angle Probe of Anomalous HWW Couplings at the LHeC

TL;DR

This paper proposes using azimuthal angle correlations at the LHeC collider to directly probe the CP properties of the Higgs boson via the HWW coupling, offering a new method to study Higgs interactions.

Contribution

It introduces a novel approach to measure the HWW coupling and its CP nature directly at the LHeC using azimuthal angle correlations in charged current events.

Findings

Azimuthal angle correlations are sensitive to the CP properties of the Higgs.

The method allows direct measurement of the HWW coupling without contamination.

Potential to distinguish between different CP scenarios of the Higgs.

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.