Measurement of the top-quark mass in the lepton+jets channel using a matrix element technique with the CDF II detector

Details Measurement of the top-quark mass in the lepton+jets channel using a matrix element technique with the CDF II detector Measurement of the top-quark mass in the lepton+jets channel using a matrix element technique with the CDF II detector

2011-08-08

arxiv.org/abs/1108.1601v2

Phys. Rev. D 84, 071105(R) (2011)

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 4 figures, 3 tables, accepted Phys. Rev. D Rapid Communications

Scientific paper

10.1103/PhysRevD.84.071105

A measurement of the top-quark mass is presented using Tevatron data from proton-antiproton collisions at center-of-mass energy $\sqrt{s}=1.96$ TeV collected with the CDF II detector. Events are selected from a sample of candidates for production of $t\bar t$ pairs that decay into the lepton+jets channel. The top-quark mass is measured with an unbinned maximum likelihood method where the event probability density functions are calculated using signal and background matrix elements, as well as a set of parameterized jet-to-parton transfer functions. The likelihood function is maximized with respect to the top-quark mass, the signal fraction in the sample, and a correction to the jet energy scale (JES) calibration of the calorimeter jets. The simultaneous measurement of the JES correction ($\JES$) amounts to an additional \textit{in situ} jet energy calibration based on the known mass of the hadronically decaying $W$ boson. Using the data sample of 578 lepton+jets candidate events, corresponding to 3.2 $fb^{-1}$ of integrated luminosity, the top-quark mass is measured to be $m_t = \rm 172.4 \pm 1.4\:(stat+\JES) \pm 1.3\:(syst) GeV/{\it c}^2$.

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