A new technique for determining charge and momentum of electrons and positrons using calorimetry and silicon tracking

We describe the application of a new methods for the determination of charge and track parameters for electrons and positrons in both central (pseudo-rapidity 0 < |η| < 1.2) and forward (pseudo- rapidity 1.2 < |η| < 2.3) regions at CDF. The method uses the shower centroid position in the calorimeter in combination with a track in the inner silicon vertex detector. The use of the central tracking chamber is not required. A comparison of the shower centroid in the calorimeter, with the extrapolated silicon vertex detector track determines the electron sign. This technique has been used to measure the W asymmetry in CDF in regions beyond the pseudo-rapidity coverage of the central tracking chamber. Application to other Physics analyses in current collider experiments at the Tevatron and in future high luminosity experiments at the LHC are discussed. 5 refs., 5 figs., 1 tab