Status of the W boson mass and the future of the electroweak fit in the next decades

TL;DR

This paper reviews the current status of W boson mass measurements, discusses theoretical and experimental uncertainties, and explores future prospects for electroweak fits to test the Standard Model and search for New Physics.

Contribution

It provides an updated summary of measurements, theoretical inputs, and future strategies for improving the precision of the W boson mass and electroweak fits.

Findings

Current measurements show consistency with the Standard Model

Future colliders could significantly reduce uncertainties

Electroweak fit remains a vital tool for New Physics searches

Abstract

A precise determination of the W boson mass is an essential test for the Standard Model of particle physics: the comparison of experimental value and theoretical prediction allows to probe the internal consistency of the electroweak sector and could possibly highlight signals of New Physics. We provide a concise and up-to-date summary of past and recent measurements at lepton and hadron colliders, a discussion of the known perturbative and non-perturbative theoretical ingredients used to provide predictions for the relevant observables, and an overview of future prospects to reduce systematic uncertainties and to compare different measurements in a consistent way. We conclude with a brief discussion on the relevance of the global electroweak fit at present and future colliders.