Update of the electroweak precision fit, interplay with Higgs-boson signal strengths and model-independent constraints on new physics

TL;DR

This paper updates the global electroweak fit incorporating recent data and theoretical advances, deriving model-independent constraints on new physics and analyzing Higgs boson coupling modifications.

Contribution

It provides the latest combined analysis of electroweak precision data, Higgs signal strengths, and model-independent constraints on potential new physics beyond the Standard Model.

Findings

Updated constraints on oblique and epsilon parameters

Refined limits on $Zb\bar{b}$ and $HVV$ couplings

Implications for new physics models

Abstract

We present updated global fits of the Standard Model and beyond to electroweak precision data, taking into account recent progress in theoretical calculations and experimental measurements. From the fits, we derive model-independent constraints on new physics by introducing oblique and epsilon parameters, and modified $Zb\bar{b}$ and $HVV$ couplings. Furthermore, we also perform fits of the scale factors of the Higgs-boson couplings to observed signal strengths of the Higgs boson.