Higgs coupling measurements at the LHC

TL;DR

This paper analyzes how dimension six operators affect Higgs physics at the LHC, providing constraints on new physics and discussing future sensitivity improvements with higher energy and luminosity.

Contribution

It offers a comprehensive global fit of dimension six operators affecting Higgs production, incorporating multiple channels and differential distributions.

Findings

Constraints on Higgs-related dimension six operators established

Potential improvements with higher energy and luminosity analyzed

Implications for beyond Standard Model scenarios discussed

Abstract

Due to the absence of tantalising hints for new physics during the LHC's run 1, the extension of the Higgs sector by dimension six operators will provide the new phenomenological standard for searches of non-resonant extensions of the Standard Model. Using all dominant and subdominant Higgs production mechanisms at the LHC, we compute the constraints on Higgs physics-relevant dimension six operators in a global and correlated fit. We show in how far these constraints can be improved by new Higgs channels becoming accessible at higher energy and luminosity, both through inclusive cross sections as well as through highly sensitive differential distributions. This allows us to discuss the sensitivity to new effects in the Higgs sector that can be reached at the LHC if direct hints for physics beyond the SM remain elusive and the impact of these constraints on well-motivated BSM scenarios.