Nonabelian Cut Diagrams and their Applications

Details Nonabelian Cut Diagrams and their Applications Nonabelian Cut Diagrams and their Applications

1996-06-19

arxiv.org/abs/hep-ph/9606374v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Contributed paper submitted to the 28th International Conference on High Energy Physics in Warsaw, July 1996. uuencoded with 1

Scientific paper

A new kind of cut diagram is introduced to sum Feynman diagrams with nonabelian vertices. Unlike the Cutkosky diagrams which compute the discontinuity of single Feynman diagrams, the nonabelian cut diagrams represent a resummation of both the real and the imaginary parts of Feynman diagrams related by permutations. Several applications of the technique are reported, including a resolution of the apparent inconsistency of the baryon problem in large-$N_c$ QCD, a simplified calculation of high-energy low-order QCD diagrams, and progress made with this technique on the unitarization of the BFKL equation.

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