Electroweak Radiative Corrections to W and Z Boson Production in Hadronic Collisions

Some results of a calculation of electroweak radiative corrections to W and Z boson production in hadronic collisions are presented. aTalk given by U.B. at the DPF96 Conference, Minneapolis, MN, August 10 – 15, 1996, to appear in the Proceedings ELECTROWEAK RADIATIVE CORRECTIONS TO W AND Z BOSON PRODUCTION IN HADRONIC COLLISIONS U. BAUR Physics Department, SUNY Buffalo, Buffalo, NY 14260 S. KELLER, D. WACKEROTH Fermilab, P.O. Box 500, Batavia, IL 60510 W. SAKUMOTO Physics Department, University of Rochester, Rochester, NY 14627 Some results of a calculation of electroweak radiative corrections to W and Z boson production in hadronic collisions are presented. Over the last five years, the Standard Model of electroweak interactions has been successfully tested at the one loop level. Experiments at LEP and the SLC have determined the properties of the Z boson with a precision of 0.1% or better, and the range of the top quark mass has been correctly predicted by comparison with loop corrections. Currently, the Z boson mass is known to ±2.2 MeV, whereas the uncertainty of the W boson mass, MW , is ±125 MeV. A precise measurement of MW and the top quark mass would make it possible to derive indirect constraints on the Higgs boson mass via top quark and Higgs boson electroweak radiative corrections to MW . A significant reduction of the W boson mass uncertainty is expected from measurements at LEP2 and the upgraded Tevatron. The ultimate precision expected for MW from the LEP2 experiments combined is approximately 40 MeV. At the Tevatron, integrated luminosities of O(1 fb) are envisioned in the Main Injector Era, resulting in an uncertainty of approximately 50 MeV per experiment. Further upgrade of the Tevatron might be possible with a goal of an overall integrated luminosity of O(30 fb) and a precision on MW of about 15 MeV . The determination of the W boson mass in a hadron collider environment requires a simultaneous precision measurement of MZ . When compared to the value measured at LEP, the Z boson mass helps to accurately determine the energy scale and the resolution of the charged lepton energy. In order to measure MW and MZ with high precision, it is crucial to fully control higher order QCD and electroweak (EW) corrections. In this short contribution, we concentrate on the latter. So far, only the final state photonic corrections have been calculated , using an approximation which indirectly