STUDYING STRUCTURE OF ELECTROWEAK CORRECTIONS

Several different effects in electroweak quantum corrections are explo red separately through the latest data on the weak-boson masses. The l eading-log approximation, the improved-Born approximation and the nond ecoupling top-quark effects are studied without depending on the recen t CDF data about mt, and the results are given in a form independent o f 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 electrowe ak theory at higher confidence level but also for new-physics searches beyond it.