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On the Sudakov suppression and enhancement for electroweak reactions

B. I. Ermolaev
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Abstract

Accounting for the double-logarithmic (DL) contributions to amplitude of Z to f \bar{f} leads to the Sudakov suppression. In contrast, resumming DL contributions to amplitudes of W to f \bar{f}' results into an exponential with a positive exponent, i.e. into the enhancement. This effect is intrinsic property of the theories with non-Abelian gauge groups.

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B. I. Ermolaev. 2002-11-19. On the Sudakov suppression and enhancement for electroweak reactions. https://arxiv.org/abs/hep-ph/0211302

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