Title: Precision Top Mass Measurement from CDF


I will present a precision measurement of the top quark mass using 4.3 fb-1 of data collected by the CDF detector during Run II of the Fermilab Tevatron. The measurement uses a matrix element method, in which, for each event, the matrix element for top pair production and decay is integrated over unknown or poorly-measured quantities. We thus obtain a likelihood of seeing the observed events as a function of top mass. This likelihood technique offers improved statistical resolution compared to traditional template methods, and our method includes several features which make it currently the most precise top mass measurement in the world.