Combination of the top-quark mass measurements from the Tevatron collider

TL;DR

This paper combines multiple measurements of the top quark mass from the Tevatron collider to achieve the most precise value to date, accounting for systematic uncertainties and correlations.

Contribution

It provides a combined top quark mass measurement with improved precision by integrating various decay channel results and systematic uncertainty treatments.

Findings

Top quark mass measured as 173.18 GeV

Achieved a total uncertainty of 0.94 GeV

Most precise top quark mass measurement to date

Abstract

The top quark is the heaviest known elementary particle, with a mass about 40 times larger than the mass of its isospin partner, the bottom quark. It decays almost 100% of the time to a $W$ boson and a bottom quark. Using top-antitop pairs at the Tevatron proton-antiproton collider, the CDF and {\dzero} collaborations have measured the top quark's mass in different final states for integrated luminosities of up to 5.8 fb$^{-1}$. This paper reports on a combination of these measurements that results in a more precise value of the mass than any individual decay channel can provide. It describes the treatment of the systematic uncertainties and their correlations. The mass value determined is $173.18 \pm 0.56 \thinspace ({\rm stat}) \pm 0.75 \thinspace ({\rm syst})$ GeV or $173.18 \pm 0.94$ GeV, which has a precision of $\pm 0.54%$, making this the most precise determination of the top quark mass.