Combination of CDF and D0 Results on the Top-Quark Mass

TL;DR

This paper combines measurements from the CDF and D0 experiments at Fermilab to provide a preliminary world average of the top-quark mass, accounting for uncertainties from data collected during two runs.

Contribution

It presents a combined analysis of top-quark mass measurements from Tevatron data, including new results and proper treatment of correlated uncertainties.

Findings

Preliminary world average top-quark mass: 172.7 GeV/c^2

Total measurement uncertainty: 2.9 GeV/c^2

Includes data from Run I and Run II experiments

Abstract

The results on the measurements of the top-quark mass, based on the data collected by the Tevatron experiments CDF and D{\O}at Fermilab during {\RunI} from 1992 to 1996 and {\RunII} since 2001, are summarized. The combination of the published {\RunI} and preliminary {\RunII} results, taking correlated uncertainties properly into account, is presented. The resulting preliminary world average for the mass of the top quark is: $\MT=172.7\pm 2.9 \GeVc2$, where the total error consists of a statistical part of $1.7 \GeVc2$ and a systematic part of $2.4 \GeVc2$. Compared to the combination prepared for the LP 2005 conference, this combination for the EPS-HEP 2005 conference includes additional published {\RunI} and preliminary {\RunII} measurements.