A Combination of CDF and D0 Results on the Mass of the Top Quark
Tevatron Electroweak Working Group (for the CDF, D0 Collaborations)
TL;DR
This paper combines measurements from the CDF and D0 experiments at Fermilab to provide a precise world average of the top-quark mass, achieving a total uncertainty of 1.4 GeV/c2.
Contribution
It presents a combined analysis of RunI and RunII data, properly accounting for correlated uncertainties to refine the top-quark mass measurement.
Findings
World average top-quark mass: 172.6 GeV/c2
Total uncertainty: 1.4 GeV/c2
Relative precision: 0.8%
Abstract
We summarize the top-quark mass measurements from the CDF and D0 experiments at Fermilab. We combine published RunI (1992-1996) measurements with the most recent RunII (2001-present) measurements using up to 2/fb of data. Taking correlated uncertainties properly into account the resulting preliminary world average mass of the top quark is Mt=172.6 +/- 0.8(sta) +/- 1.1(sys) GeV/c2, assuming Gaussian systematic uncertainties. Adding in quadrature yields a total uncertainty of 1.4 GeV/c2, corresponding to a relative precision of 0.8% on the top-quark mass.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research