W Boson Mass Measurement at the Tevatron

TL;DR

This paper reports on the measurement of the W boson mass at the Tevatron, highlighting the improved precision achieved with data from Run 2, which is crucial for testing the Standard Model and constraining the Higgs boson mass.

Contribution

The paper presents the first W boson mass measurement from Tevatron Run 2 data, significantly reducing the uncertainty compared to previous measurements.

Findings

Measured W boson mass with 76 MeV uncertainty from initial Run 2 data.

Demonstrated potential for further precision improvements with additional Run 2 data.

Confirmed the importance of W mass measurements for Standard Model constraints.

Abstract

The W boson mass (mW) is a key parameter of the standard model, constraining the mass of the unobserved Higgs boson. Using Tevatron ppbar collision data from 1992-1996, the CDF and D0 collaborations measured mW to a precision of 59 MeV. The ongoing Tevatron Run 2 has produced a factor of 5 more collisions, promising a significant reduction in the W mass uncertainty. CDF has analyzed the first 200/pb of Run 2 data and determined the uncertainty on its W mass measurement to be 76 MeV.