Top Quark Mass Measurement in Lepton+Jets Channel Using a Multivariate Technique

We present a preliminary measurement of the top quark mass using the Run II data collected with the CDF detector at Fermilab. The $t\bar{t}$ events produced in $p\bar{p}$ collisions at $\sqrt{s}$ = 1.96 GeV are reconstructed in the lepton+jets channel. Using a matrix element method with transfer functions derived from Monte Carlo to connect jets to partons, we calculate a likelihood for each event to be a top candidate at several possible top masses. Taking into account the presence of background and using additional kinematics variables we derive a value for the top mass.