Direct and indirect measurements of the W boson mass at Fermilab

摘要

Presented are the direct measurements of the W boson mass from the CDF and D0 experiments at the Fermilab p(bar p) collider using data from the 1994--1995 run. The W from the D0 experiment is 80.44 (+-) 0.12 GeV and the preliminary mass from CDF is 80.43 (+-) 0.16 GeV. Combining these mass values with the previous Tevatron measurements leads to a M(sub W) 80.41 (+-) 0.09 GeV. Also, presented is the new measurement of sin(sup 2) (Theta)(sub W)(sup on-shell) = 0.2199 (+-) 0.0020(stat) (+-) 0.0009