The two-loop vector form factor in the Sudakov limit
Abstract
Recently two-loop electroweak corrections to the neutral current four-fermion processes at high energies have been presented. The basic ingredient of this calculation is the evaluation of the two-loop corrections to the Abelian vector form factor in a spontaneously broken SU(2) gauge model. Whereas the final result and the derivation of the four-fermion cross sections from evolution equations have been published earlier, the calculation of the form factor from the two-loop Feynman diagrams is presented for the first time in this paper. We describe in detail the individual contributions to the form factor and their calculation with the help of the expansion by regions method and Mellin-Barnes representations.
Cite
@article{arxiv.hep-ph/0603133,
title = {The two-loop vector form factor in the Sudakov limit},
author = {Bernd Jantzen and Vladimir A. Smirnov},
journal= {arXiv preprint arXiv:hep-ph/0603133},
year = {2009}
}
Comments
25 pages. Bernd Jantzen was Bernd Feucht in publications before 2005. v2: minor changes in the discussion of the results according to the version published in Eur. Phys. J. C