Measurement of the Top Quark Mass in the Dilepton Channel
B. Abbott, et al. (D0 Collaboration)
TL;DR
This paper reports a measurement of the top quark mass in the dilepton decay channel using data from the D0 experiment, combining it with previous results to refine the top quark mass estimate.
Contribution
First measurement of the top quark mass in the dilepton channel using maximum likelihood analysis, combined with prior measurements for improved accuracy.
Findings
Measured top quark mass in dilepton channel: 168.4 GeV/c^2
Combined top quark mass from all channels: 172.1 GeV/c^2
Uncertainties include statistical and systematic errors
Abstract
We report a measurement of the top quark mass using six candidate events for the process pbarp->ttbar->l^+ nu l^- nubar b bbar + X, observed in the D0 experiment at the Fermilab ppbar collider. Using maximum likelihood fits to the dynamics of the decays, we measure a mass for the top quark of m(top) = 168.4 +- 12.3 (stat) +- 3.6 (syst) GeV/c^2. We combine this result with our previous measurement in the ttbar->l+jets channel to obtain m(top) = 172.1 +- 7.1 GeV/c^2 as the best value of the mass of the top quark measured by D0.
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