We report the first measurement of the top quark mass using the
decay length technique in p anti-p collisions at a center-of-mass energy of
1.96 TeV. This technique uses the measured flight distance of the b hadron
to infer the mass of the top quark in lepton plus jets events with missing
transverse energy scale uncertainty that is common to all other methods so
far. We apply our novel method to a 695 pb-1 data sample recorded by the
CDF II detector at Fermilab and extract a measurement of m_t =
180.7+15.5_-13.4 (stat.) +/- 8.6 (syst.) GeV/c2. While the uncertainty of
this result is larger than that of other measurements, the dominant
uncertainties in the decay length technique are uncorrelated with those in
other methods. This result can help reduce the overall uncertainty when
combined with other existing measurements of the top quark mass.
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Updated: Wednesday, 2007 April 18 10:23:32 CDT automatically from input from Carol Picciolo