Gluon-Gluon Antenna Functions from Higgs Boson Decay
arXiv:hep-ph/0502110 · doi:10.1016/j.physletb.2005.03.003
Abstract
Antenna functions describe the infrared singular behaviour of colour-ordered QCD matrix elements due to the emission of unresolved partons inside an antenna formed by two hard partons. In this paper, we show that antenna functions for hard gluon-gluon pairs can be systematically derived from the effective Lagrangian describing Higgs boson decay into gluons, and compute the the infrared structure of the colour-ordered Higgs boson decay matrix elements at NLO and NNLO.
12 pages