Mass gap effects and higher order electroweak Sudakov logarithms
Abstract
The infrared structure of spontaneously broken gauge theories is phenomenologically very important and theoretically a challenging problem. Various attempts have been made to calculate the higherorder behavior of large doublelogarithmic (DL) corrections originating from the exchange of electroweak gauge bosons resulting in contradictory claims. We present results from twoloop electroweak corrections for the process g>f_{R}f¯_{L} to DL accuracy. This process is ideally suited as a theoretical model reaction to study the effect of the mass gap of the neutral electroweak gauge bosons at the twoloop level. Contrary to recent claims in the literature, we find that the calculation performed with the physical Standard Model fields is in perfect agreement with the results from the infrared evolution equation method. In particular, we can confirm the exponentiation of the electroweak Sudakov logarithms through two loops.
 Publication:

Physics Letters B
 Pub Date:
 December 2000
 DOI:
 10.1016/S03702693(00)01234X
 arXiv:
 arXiv:hepph/0006077
 Bibcode:
 2000PhLB..495...81M
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 10 pages, 3 figures, LaTeX2e, uses epsfig