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QCD in the color-flow representation
Please always quote using this URN: urn:nbn:de:bvb:20-opus-129583
- 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 theyFor 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.…
Author: | W. Kilian, T. Ohl, J. Reuter, C. Speckner |
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URN: | urn:nbn:de:bvb:20-opus-129583 |
Document Type: | Journal article |
Faculties: | Fakultät für Physik und Astronomie / Institut für Theoretische Physik und Astrophysik |
Language: | English |
Parent Title (English): | Journal of High Energy Physics |
Year of Completion: | 2012 |
Volume: | 10 |
Issue: | 022 |
Source: | Journal of High Energy Physics 10 (2012) 022. DOI:10.1007/JHEP10(2012)022 |
DOI: | https://doi.org/10.1007/JHEP10(2012)022 |
ArXiv Id: | http://arxiv.org/abs/1206.3700 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 539 Moderne Physik |
Tag: | 1/N expansion; QCD; scattering amplitudes |
Release Date: | 2016/11/24 |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung |