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Infrared finite ghost propagator in the Feynman gauge
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Infrared finite ghost propagator in the Feynman gauge
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| dc.contributor.author | Aguilar, Arlene Cristina | |
| dc.contributor.author | Papavassiliou, Joannis | |
| dc.date.accessioned | 2015-04-22T12:06:07Z | |
| dc.date.available | 2015-04-22T12:06:07Z | |
| dc.date.issued | 2008 | |
| dc.identifier.citation | Aguilar, Arlene Cristina Papavassiliou, Joannis 2008 Infrared finite ghost propagator in the Feynman gauge Physical Review D 77 12 125022 | |
| dc.identifier.uri | http://hdl.handle.net/10550/43277 | |
| dc.description.abstract | We demonstrate how to obtain from the Schwinger-Dyson equations of QCD an infrared finite ghost propagator in the Feynman gauge. The key ingredient in this construction is the longitudinal form factor of the non-perturbative gluon-ghost vertex, which, contrary to what happens in the Landau gauge, contributes non-trivially to the gap equation of the ghost. The detailed study of the corresponding vertex equation reveals that in the presence of a dynamical infrared cutoff this form factor remains finite in the limit of vanishing ghost momentum. This, in turn, allows the ghost self-energy to reach a finite value in the infrared, without having to assume any additional properties for the gluon-ghost vertex, such as the presence of massless poles. The implications of this result and possible future directions are briefly outlined. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Physical Review D, 2008, vol. 77, num. 12, p. 125022 | |
| dc.subject | Física | |
| dc.title | Infrared finite ghost propagator in the Feynman gauge | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2015-04-22T12:06:07Z | |
| dc.identifier.doi | 10.1103/PhysRevD.77.125022 | |
| dc.identifier.idgrec | 049102 | |
| dc.rights.accessRights | open access | es_ES |
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