Matter Dependence of the Three-Loop Soft Anomalous Dimension Matrix

Details Matter Dependence of the Three-Loop Soft Anomalous Dimension Matrix Matter Dependence of the Three-Loop Soft Anomalous Dimension Matrix

2009-01-22

arxiv.org/abs/0901.3414v2

Phys.Rev.D79:091501,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 2 figures; v2 minor clarifications, references added

Scientific paper

10.1103/PhysRevD.79.091501

The resummation of soft gluon exchange for QCD hard scattering requires a matrix of anomalous dimensions, which has been computed through two loops. The two-loop matrix is proportional to the one-loop matrix. Recently there have been proposals that this proportionality extends to higher loops. One can test such proposals by computing the dependence of this matrix on the matter content in a generic gauge theory. It is shown that for the matter-dependent part the proportionality extends to three loops for arbitrary massless processes.

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