Measurement of the W Boson Mass with the D0 Detector

TL;DR

This paper reports a precise measurement of the W boson mass using a large dataset from the D0 detector at Fermilab, achieving a combined result with improved accuracy over previous measurements.

Contribution

The paper presents a new measurement of the W boson mass with a larger dataset and improved analysis techniques, reducing uncertainties compared to earlier results.

Findings

Measured W boson mass: 80.375 +/- 0.023 GeV

Large dataset of 1.7 million W -> e u events

Improved precision over previous measurements

Abstract

We present a measurement of the W boson mass using data corresponding to 4.3fb^-1 of integrated luminosity collected with the D0 detector during Run II at the Fermilab Tevatron p\bar{p} collider. With a sample of 1,677,394 W -> e\nu candidate events, we measure M_W = 80.367 +/- 0.026 GeV. This result is combined with an earlier D0 result determined using an independent Run II data sample, corresponding to 1fb^-1 of integrated luminosity, to yield M_W = 80.375 +/- 0.023 GeV.