Techniques for one-loop tensor integrals in many-particle processes
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
We briefly sketch the methods for a numerically stable evaluation of tensor one-loop integrals that have been used in the calculation of the complete electroweak one-loop corrections to fermions. In particular, the improvement of the new methods over the conventional Passarino--Veltman reduction is illustrated for some 4-point integrals in the delicate limits of small Gram (and other kinematical) determinants.
Keywords
Cite
@article{arxiv.hep-ph/0601085,
title = {Techniques for one-loop tensor integrals in many-particle processes},
author = {A. Denner and S. Dittmaier},
journal= {arXiv preprint arXiv:hep-ph/0601085},
year = {2008}
}
Comments
5 pages, latex, 2 postscript figures, to appear in the proceedings of the "7th International Symposium on Radiative Corrections (RADCOR2005)", Shonan Village, 2005