Precise Measurement of the Top-Quark Mass in the Lepton+Jets Topology at CDF II Academic Article uri icon


  • 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-->W(+)bW(-)b-->lnubqq'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(-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(2).

author list (cited authors)

  • Aaltonen, T., Abulencia, A., Adelman, J., Affolder, T., Akimoto, T., Albrow, M. G., ... Zucchelli, S.

citation count

  • 23

publication date

  • October 2007