Top Quark Mass Measurement Using a Matrix Element Method with Quasi-Monte Carlo Integration

Physics – High Energy Physics – High Energy Physics - Experiment

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3 pages. Proceedings for the 34th International Conference on High Energy Physics (ICHEP08), Philadelphia, 2008. Minor text fi

Scientific paper

We report an updated measurement of the top quark mass obtained from ppbar collisions at sqrt(s) = 1.96 TeV at the Fermilab Tevatron using the CDF II detector. Our measurement uses a matrix element integration method to obtain a signal likelihood, with a neural network used to identify background events and a likelihood cut applied to reduce the effect of badly reconstructed events. We use a 2.7 fb^-1 sample and observe 422 events passing all of our cuts. We find m_t = 172.2 +/- 1.0 (stat.) +/- 0.9 (JES) +/- 1.0 (syst.) GeV/c^2, or m_t = 172.2 +/- 1.7 (total) GeV/c^2.

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