The Gauge-Higgs Legacy of the LHC Run I

TL;DR

This paper uses LHC Run I data to constrain new physics effects in the electroweak sector, combining di-boson and Higgs measurements within an effective Lagrangian framework to improve bounds on higher-dimensional operators.

Contribution

It provides updated constraints on triple gauge couplings from LHC data and demonstrates how combining these with Higgs measurements enhances limits on effective operators.

Findings

Bounds on triple gauge couplings are several times stronger than LEP.

Combining di-boson and Higgs data improves constraints on Higgs and gauge sector operators.

Effective Lagrangian approach effectively constrains new physics at the electroweak scale.

Abstract

The effective Lagrangian expansion provides a framework to study effects of new physics at the electroweak scale. To make full use of LHC data in constraining higher-dimensional operators we need to include both the Higgs and the electroweak gauge sector in our study. We first present an analysis of the relevant di-boson production LHC results to update constraints on triple gauge boson couplings. Our bounds are several times stronger than those obtained from LEP data. Next, we show how in combination with Higgs measurements the triple gauge vertices lead to a significant improvement in the entire set of operators, including operators describing Higgs couplings.