Combination of CDF and DO Results on the Mass of the Top Quark

TL;DR

This paper combines top-quark mass measurements from CDF and DØ experiments at Fermilab, providing an updated estimate with detailed uncertainty analysis, but does not replace the latest world average.

Contribution

It presents a combined analysis of top-quark mass measurements from multiple data sets and experiments, accounting for correlated uncertainties.

Findings

Combined top-quark mass: 174.2 GeV/c^2

Total uncertainty: 3.3 GeV/c^2

Does not supersede the latest world average

Abstract

We summarize the published top-quark mass measurements from the CDF and DO experiments at Fermilab. We combine published Run-I (1992-1996) measurements with the most recent published Run-II (2001-present) measurements using up to 340 pb of data. Taking correlated uncertainties properly into account the resulting mass of the top quark is m(top)=174.2 +- 2.0(stat) +- 2.6(syst) GeV/c^2, which corresponds to a total uncertainty of 3.3 GeV/c^2, i.e. 1.9% precision. Since this combination uses only a subset of the available analyses and data sets, it does not supersede our latest world average combination of m(top)=172.5 +- 1.3(stat) +- 1.9(syst) GeV/c^2, which is based on the latest published and preliminary results.