Abstract
We present a measurement of the mass of the top quark using data corresponding to an integrated luminosity of of collisions collected at with the CDF II detector at Fermilab’s Tevatron. This is the first measurement of the top quark mass using top-antitop pair candidate events in the and dilepton decay channels simultaneously. We reconstruct two observables in each channel and use a nonparametric kernel density estimation technique to derive two-dimensional probability density functions from simulated signal and background samples. The observables are the top quark mass and the invariant mass of two jets from the decay in the channel, and the top quark mass and the scalar sum of transverse energy of the event in the dilepton channel. We perform a simultaneous fit for the top quark mass and the jet energy scale, which is constrained in situ by the hadronic boson mass. Using 332 candidate events and 144 dilepton candidate events, we measure the top quark mass to be .
5 More- Received 1 October 2008
DOI:https://doi.org/10.1103/PhysRevD.79.092005
©2009 American Physical Society