TY  - JOUR
A1  - Kilian, W.
A1  - Ohl, T.
A1  - Reuter, J.
A1  - Speckner, C.
T1  - QCD in the color-flow representation
JF  - Journal of High Energy Physics
N2  - For many practical purposes, it is convenient to formulate unbroken non-abelian gauge theories like QCD in a color-flow basis. We present a new derivation of SU(N) interactions in the color-flow basis by extending the gauge group to U(N) × U(1)′ in such a way that the two U(1) factors cancel each other. We use the quantum action principles to show the equivalence to the usual basis to all orders in perturbation theory. We extend the known Feynman rules to exotic color representations (e.g. sextets) and discuss practical applications as they occur in automatic computation programs.
KW  - QCD
KW  - scattering amplitudes
KW  - 1/N expansion
Y1  - 2012
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-129583
VL  - 10
IS  - 022
ER  -