  We present a novel approach that is being developed at DZero for extracting
information from data through a direct comparison of all measured variables in
an event with a matrix element that describes the entire production process.
The method is exemplified in the extraction of the mass of the top quark in
top-antitop events in the lepton+jets final state. Monte Carlo studies suggest
that an improvement of about a factor of two in statistical uncertainty on the
mass of the top quark can be achieved relative to previously published work for
the same channel. Preliminary results from the re-analysis provide a reduction
in the statistical uncertainty of almost a factor of 1.6, corresponding to an
effective factor of 2.4 increase in the size of the data sample.
