Combination of CDF and D0 results on the mass of the top quark using up to 9.7 fb$^{-1}$ at the Tevatron

TL;DR

This paper combines top-quark mass measurements from CDF and D0 at Fermilab, resulting in a precise average mass of 174.34 GeV/c^2 with a 0.37% uncertainty, enhancing the accuracy of top-quark property estimates.

Contribution

It provides a combined top-quark mass measurement from multiple experiments and data sets, improving precision by accounting for correlations and uncertainties.

Findings

Combined top-quark mass: 174.34 GeV/c^2

Uncertainty: 0.64 GeV/c^2

Relative precision: 0.37%

Abstract

We summarize the current top-quark mass measurements from the CDF and D0 experiments at Fermilab. We combine published Run I (1992--1996) results with the most precise published and preliminary Run II (2001--2011) measurements based on data corresponding to up to 9.7 fb$^{-1}$ of $p\bar{p}$ collisions. Taking correlations of uncertainties into account, and combining the statistical and systematic uncertainties, the resulting preliminary Tevatron average mass of the top quark is $M_{top} = 174.34 \pm 0.64 ~GeV/c^2$, corresponding to a relative precision of 0.37%.