Modified Higgs couplings and unitarity violation

TL;DR

This paper explores how deviations in Higgs couplings from Standard Model predictions could lead to unitarity violation at certain energy scales, analyzing implications for collider physics.

Contribution

It provides a quantitative analysis linking Higgs coupling deviations to the energy scale of unitarity violation in specific scattering processes.

Findings

Deviations in Higgs couplings can lower the unitarity violation scale.

The analysis constrains possible new physics beyond the Standard Model.

Results inform future collider experiments on Higgs coupling measurements.

Abstract

Prompted by the recent observation of a Higgs-like particle at the CERN Large Hadron Collider (LHC), we investigate a quantitative correlation between possible departures of the gauge and Yukawa couplings of this particle from their Standard Model expectations and the scale of unitarity violation in the processes $WW \to WW$ and $t\bar t \to WW$.