Precise Measurement of the Top-Quark Mass in the Lepton+Jets Topology at CDF II
- Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
- University of Illinois, Urbana, Illinois 61801 (United States)
We present a measurement of the mass of the top quark from proton-antiproton collisions recorded at the CDF experiment in Run II of the Fermilab Tevatron. We analyze events from the single lepton plus jets final state (tt{yields}W{sup +}bW{sup -}b{yields}l{nu}bqq{sup '}b). The top-quark mass is extracted using a direct calculation of the probability density that each event corresponds to the tt final state. The probability is a function of both the mass of the top quark and the energy scale of the calorimeter jets, which is constrained in situ by the hadronic W boson mass. Using 167 events observed in 955 pb{sup -1} of integrated luminosity, we achieve the single most precise measurement of the top-quark mass, 170.8{+-}2.2(stat.){+-}1.4(syst.) GeV/c{sup 2}.
- OSTI ID:
- 21024375
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 18; Other Information: DOI: 10.1103/PhysRevLett.99.182002; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). CDF Collaboration; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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