Trilinear Gauge Couplings from gamma/gamma to WW

TL;DR

This paper investigates the potential to measure anomalous trilinear gauge couplings in gamma/gamma collisions, which could reveal signs of strong electroweak symmetry breaking if the Standard Model Higgs is absent.

Contribution

It presents a detailed analysis of measuring gamma WW trilinear gauge couplings at a gamma/gamma collider, highlighting the achievable sensitivity levels.

Findings

Sensitivity of 0.001-0.0001 for gauge couplings

Effective measurement depends on initial polarization

Potential to detect strong electroweak symmetry breaking effects

Abstract

If there is no the Standard Model Higgs boson, the interaction among the gauge bosons becomes strong at high energies (~ 1TeV). The effects of strong electroweak symmetry breaking could manifest themselves indirectly through the vertices as anomalous gauge boson couplings before they give rise to new physical states like resonances. Here a study of the measurement of trilinear gauge couplings kappa_gamma and lambda_gamma is presented looking at the hadronic decay channel of the WW boson pair at an gamma/gamma-collider. A sensitivity of order of 0.001-0.0001 can be reached depending on the coupling under consideration and on the initial polarisation state.