Nonabelian Cut Diagrams and their Applications
Abstract
Description
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.
Contributed paper submitted to the 28th International Conference on High Energy Physics in Warsaw, July 1996. uuencoded with 1 postscript figure (6 pages)
Contributed paper submitted to the 28th International Conference on High Energy Physics in Warsaw, July 1996. uuencoded with 1 postscript figure (6 pages)