Effective Theory Approach to W-Pair Production near Threshold

TL;DR

This paper reviews the effective theory approach for W-pair production near threshold, presenting NLO calculations and discussing uncertainties and implications for W mass measurements.

Contribution

It introduces a detailed effective theory calculation for W-pair production near threshold at NLO, improving theoretical precision.

Findings

Calculated W-pair production cross section near threshold at NLO

Analyzed theoretical uncertainties impacting W mass measurement

Discussed the relevance of effective theory in unstable particle production

Abstract

In this talk, I review the effective theory approach to unstable particle production and present results of a calculation of the process e- e+ ->mu- nubar_mu u dbar X near the W-pair production threshold up to next-to-leading order in GammaW/MW ~ alpha ~ v^2. The remaining theoretical uncertainty and the impact on the measurement of the W mass is discussed.