Progress towards 2 to 2 scattering at two-loops
高能物理 - 唯象学
2008-11-26 v1
摘要
We discuss the two-loop integrals necessary for evaluating massless 2 to 2 scattering amplitudes. As a test process, we consider the leading colour two-loop contribution to qqbar to q'qbar'. We show that for physical scattering processes the two Smirnov-Veretin planar box graphs I1 and I2 are accompanied by factors of 1/(D-4) thereby necessitating a knowledge of both I1 and I2 to O(epsilon). Using an alternative basis I1 and the irreducible numerator integral I3, the factors of 1/(D-4) disappear.
引用
@article{arxiv.hep-ph/0010031,
title = {Progress towards 2 to 2 scattering at two-loops},
author = {E. W. N. Glover and M. E. Tejeda-Yeomans},
journal= {arXiv preprint arXiv:hep-ph/0010031},
year = {2008}
}
备注
6 pages, latex, npb.sty, 3 postscript figures, contributed to proceedings of "Loops and Legs in Quantum Field Theory", Bastei, Germany, April 9-14, 2000