Measurement of the Top Quark Mass with the Collider Detector at Fermilab

We present a new measurement of the top quark mass in tt- events in which both W bosons from top quarks decay into leptons (eν,μν). We use events collected by the CDF experiment from pp- collisions at sqrt[s] = 1.8 TeV at the Tevatron collider. We measure a top quark mass of 167.4±10.3(stat)±4.8(syst) GeV/c2 from a sample of eight events. We combine this result with previous CDF measurements in other decay channels to obtain a final mass value of 176.0±6.5 GeV/c2