Eikonal gluon radiation at finite-Nc beyond 2 loops
arXiv:1507.01132
Abstract
We present first calculations of QCD matrix-elements in perturbation theory at finite Nc beyond 2 loops in the eikonal approximation for e+ e- annihilation processes. For the emission of n soft energy-ordered gluons we solve both the colour and kinematic structures at a given order in perturbation theory by means of a Mathematica program that relies solely on a recently developed Mathematica code, ColorMath, that evaluates the trace of products of colour matrices. At large Nc, our squared amplitudes reduce to those already known in the literature.
To appear in the proceedings of the XXIII International Workshop on Deep-Inelastic Scattering and Related Subjects, April 27 - May 1, 2015, Dallas, Texas, USA
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