Measurement of the top-quark mass using missing $E_T$+jets events with secondary vertex $b$-tagging at CDF II

Understand

We present a measurement of the top-quark mass in $p\bar p$ collisions at \hbox{$\sqrt{s}=1.96$} TeV which uses events with an inclusive signature of missing transverse energy and jets.

• % The event selection is sensitive to $t\bar t\to W^+bW^-\bar b\to l\nu b q q^\prime \bar b$ independent of the lepton flavor, and results in a large acceptance for $W\to\tau\nu$ decays.
• % All-hadronic $t\bar t$ decays and events with identified electrons or muons are vetoed to provide a statistically independent sample with respect to all previous measurements.
• % The top-quark mass is inferred from the distribution of the scalar sum of all jet transverse energies and the missing transverse energy.