Flavourful SMEFT likelihood for Higgs and electroweak data

TL;DR

This paper provides an updated, comprehensive fit of Higgs and electroweak data within the SMEFT framework, enabling broader new physics model testing without flavor symmetry assumptions.

Contribution

It introduces a publicly available SMEFT likelihood implementation that incorporates Higgs, electroweak, and flavor observables for global parameter fitting.

Findings

Updated fit to LHC Higgs data and LEP electroweak tests

Implementation of a flavor-general SMEFT likelihood

Facilitates testing of diverse new physics models

Abstract

We perform an updated fit to LHC Higgs data and LEP electroweak precision tests in the framework of the Standard Model Effective Field Theory (SMEFT). We assume a generic structure of the SMEFT operators without imposing any flavour symmetries. The implementation is released as part of the public global SMEFT likelihood. This allows one to fit parameters of a broad class of new physics models to combined Higgs, electroweak, quark flavour, and lepton flavour observables.