Abstract
A quick method of calculating certain combinations of the O( α 2) corrections in the electroweak theory is presented. The results agree with earlier explicit calculations of the O( α 2) corrections to the vector boson masses and in other cases provide an estimate of the lower limits for such corrections. Some non-standard effects like heavy fermion or supersymmetric contributions are also discussed. Detailed calculations show that even in the case of the strong supersymmetric contribution, the new one-loop corrections are comparable to the two-loop ones in the standard model.
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