A method of extracting the mass of the top quark in the di-lepton   channel using the D0 Detector
  We present a method for extracting the mass of the top quark from the di-lepton decays of top anti-top quark pairs. In this decay channel two neutrinos remain undetected. Extraction of the mass of the top quark by kinematic reconstruction is not possible because the event is under-constrained. We therefore employ a dynamical likelihood method to solve the problem. 
Sarosh N. Fatakia (Boston University, for the D0 Collaboration)