Electroweak Physics At Cdf PDF Download

The CDF collaboration will vigorously pursue a comprehensive program of electroweak physics during Run II at the Tevatron based strongly on the successful Run I program. The Run IIa integrated luminosity goal of 2 fb[sup -1] will lead to a CDF dataset twenty times larger than that collected in Run I. In addition, an increase in the energy of the colliding beams from[radical]s= 1.80 TeV to[radical]s= 1.96 TeV for Run II provides a 10% increase in the W and Z boson production cross sections and a corresponding enlargement of the electroweak event samples. In the near term, CDF expects to collect a dataset with 2-3 times the integrated luminosity of Run I by September of 2003. Utilizing these new datasets CDF will be able to make improved, precision measurements of Standard Model electroweak parameters including M[sub W], M[sub top], [Lambda][sub W], and sin[sup 2][theta][sub W][sup eff]. The goal of these measurements will be to improve our understanding of the self-consistency of the Standard Model and knowledge of the Higgs boson mass within the model. The top plot in Fig. 1 illustrates our current knowledge of the Standard Model Higgs mass based on measurements of M[sub W] and M[sub top]. The constraints imposed by combined CDF and D0 Run I measurements of M[sub W] (80.456[+-] 0.059GeV/c[sup 2]) and M[sub top] (174.3[+-] 5.1GeV/c[sup 2]) are illustrated by the shaded oval region on the plot. The hatched rectangle shows the additional constraint imposed by the recent LEP2 measurement of M[sub W]. The bottom plot in Fig. 1 illustrates the expected improvement in these constraints based on Run II CDF measurements utilizing a 2 fb[sup -1] dataset. The shaded oval region in this plot is based on current estimates of a 40 MeV/c[sup 2] uncertainty for measuring M[sub W] and a 2-3 GeV/c[sup 2] uncertainty for measuring M[sub top].