STUDYING STRUCTURE OF ELECTROWEAK CORRECTIONS

Several different effects in electroweak quantum corrections are explored separately through the latest data on the weak-boson masses. The leading-log approximation, the improved-Born approximation and the nondecoupling top-quark effects are studied without depending on the recent CDF data about mt, and the results are given in a form independent of the Higgs mass. On the other hand, the bosonic and the nondecoupling Higgs effects are examined by fully taking account of those CDF data. It is emphasized that future precision measurements of Mw and mt are considerably significant not only for further studies of the electroweak theory at higher confidence level but also for new-physics searches beyond it.