Combination of CDF and D0 Results on the Mass of the Top Quark
Tevatron Electroweak Working Group (for the CDF Collaboration, and the, D0 Collaboration)
TL;DR
This paper combines measurements from CDF and D0 experiments to provide a precise preliminary world average of the top quark mass, achieving a 0.75% relative uncertainty.
Contribution
It presents the first combined analysis of Run I and Run II data from CDF and D0, improving the precision of the top quark mass measurement.
Findings
Preliminary world average top quark mass: 173.1 GeV/c2
Total uncertainty of 1.3 GeV/c2
Relative precision of 0.75%
Abstract
We summarize the top-quark mass measurements from the CDF and D0 experiments at Fermilab. We combine published Run I (1992-1996) measurements with the most recent preliminary Run II (2001-present) measurements using up to 3.6 fb-1 of data per experiment. Taking correlated uncertainties properly into account the resulting preliminary world average mass of the top quark is Mt = 173.1 +/- 0.6 (stat.) +/- 1.1 (syst.) GeV/c2, assuming Gaussian systematic uncertainties. Adding in quadrature yields a total uncertainty of 1.3 GeV/c2, corresponding to a relative precision of 0.75% 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