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https://hdl.handle.net/2440/57964
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DC Field | Value | Language |
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dc.contributor.author | Matevosyan, H. | - |
dc.contributor.author | Thomas, A. | - |
dc.date.issued | 2008 | - |
dc.identifier.citation | Journal of Physics G: Nuclear and Particle Physics, 2008; 35(11):1-11 | - |
dc.identifier.issn | 0954-3899 | - |
dc.identifier.issn | 1361-6471 | - |
dc.identifier.uri | http://hdl.handle.net/2440/57964 | - |
dc.description.abstract | The 1/Nc expansion is one of the very few methods we have for generating a systematic expansion of QCD at the energy scale relevant to hadron structure. The present formulation of this theory relies on the double-line notation for calculating the leading order of a diagram in the 1/Nc expansion, where the local SU(Nc) gauge symmetry is substituted by a U(Nc) symmetry and the associated U(1) ghost field is ignored. In the current work we demonstrate the insufficiency of this formulation for describing certain non-planar diagrams of interest in current attempts to model QCD. We derive a more complete set of Feynman rules that include the U(1) ghost field and provide a useful tool for calculating both color factors and 1/Nc orders of all color-singlet diagrams. | - |
dc.description.statementofresponsibility | Hrayr H Matevosyan and Anthony W Thomas | - |
dc.language.iso | en | - |
dc.publisher | IOP Publishing Ltd | - |
dc.rights | © 2008 IOP Publishing Ltd | - |
dc.source.uri | http://dx.doi.org/10.1088/0954-3899/35/11/115006 | - |
dc.title | Role of the U(1) ghost beyond leading order in a large-Nc expansion | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1088/0954-3899/35/11/115006 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Matevosyan, H. [0000-0002-4074-7411] | - |
dc.identifier.orcid | Thomas, A. [0000-0003-0026-499X] | - |
Appears in Collections: | Aurora harvest 5 Physics publications |
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