NNLO hard functions in massless QCD
High Energy Physics - Phenomenology
2015-06-22 v1
Abstract
We derive the hard functions for all 2->2 processes in massless QCD up to next-to-next-to-leading order (NNLO) in the strong coupling constant. By employing the known one- and two-loop helicity amplitudes for these processes, we obtain analytic expressions for the ultraviolet and infrared finite, minimally subtracted hard functions, which are matrices in color space. These hard functions will be useful in carrying out higher-order resummations in processes such as dijet and highly energetic top-quark pair production by means of soft-collinear effective theory methods.
Cite
@article{arxiv.1409.5294,
title = {NNLO hard functions in massless QCD},
author = {Alessandro Broggio and Andrea Ferroglia and Ben D. Pecjak and Zhibai Zhang},
journal= {arXiv preprint arXiv:1409.5294},
year = {2015}
}
Comments
20 pages