Combination of CDF and D0 Results on the Top-Quark Mass
The CDF Collaboration, the D0 Collaboration, the Tevatron Electroweak Working Group
TL;DR
This paper aggregates five Run I measurements of the top-quark mass from CDF and DØ, incorporating correlated systematic uncertainties. Using BLUE (with an independent cross-check via χ² minimization), it derives a world average of $M_{ ext{top}}=178.0\pm4.3$ GeV/$c^2$, with the jet energy scale the dominant systematic contribution. The results show good internal consistency (χ²=2.6 for 4 d.o.f., p=63%) and improve the top-quark mass precision to about 2.4%. The improved precision and agreement across channels strengthen the reliability of the top-quark mass determination from Run I data.
Abstract
The results on the measurements of the top-quark mass, based on the data collected by the Tevatron experiments CDF and DO at Fermilab during Run I from 1992 to 1996, are summarized. The combination of the published results, taking correlated uncertainties properly into account, is presented. The resulting world average for the mass of the top quark is: $M_t = 178.0 \pm 4.3 GeV/c^2$, where the total error of consists of a statistical part of $2.7 GeV/c^2$ and a systematic part of $3.3 GeV/c^2$.