We present complete analytical O(ϵ2) results on the one-loop amplitudes relevant for the NNLO quark-parton model description of the hadroproduction of heavy quarks as given by the so-called loop-by-loop contributions. All results of the perturbative calculation are given in the dimensional regularization scheme. These one-loop amplitudes can also be used as input in the determination of the corresponding NNLO cross sections for heavy flavor photoproduction, and in photon-photon reactions.
@article{arxiv.hep-ph/0511264,
title = {One-loop amplitudes for four-point functions with two external massive quarks and two external massless partons up to O(epsilon^2)},
author = {J. G. Körner and Z. Merebashvili and M. Rogal},
journal= {arXiv preprint arXiv:hep-ph/0511264},
year = {2016}
}
Comments
25 pages, 6 figures in the text, Revtex, one reference added, minor improvements in the text, to appear in Phys.Rev.D