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dc.contributor.authorRodríguez Quintero, José 
dc.date.accessioned2015-05-05T10:15:44Z
dc.date.available2015-05-05T10:15:44Z
dc.date.issued2011
dc.identifier.citationRodríquez Quintero, J.: "On the massive gluon propagator, the PT-BFM scheme and the low-momentum behaviour of decoupling and scaling DSE solutions". Journal of High Energy Physics. Vol. 2011, n. 1, (2014). ISSN 1029-8479en_US
dc.identifier.issn1029-8479
dc.identifier.urihttp://hdl.handle.net/10272/10494
dc.description.abstractWe study the low-momentum behaviour of Yang-Mills propagators obtained from Landau-gauge Dyson-Schwinger equations (DSE) in the PT-BFM scheme. We compare the ghost propagator numerical results with the analytical ones obtained by analyzing the low-momentum behaviour of the ghost propagator DSE in Landau gauge, assuming for the truncation a constant ghost-gluon vertex and a simple model for a massive gluon propagator. The asymptotic expression obtained for the regular or decoupling ghost dressing function up to the order O(q2) is proven to fit pretty well the numerical PT-BFM results. Furthermore, when the size of the coupling renormalized at some scale approaches some critical value, the numerical PT-BFM propagators tend to behave as the scaling ones. We also show that the scaling solution, implying a diverging ghost dressing function, cannot be a DSE solution in the PT-BFM scheme but an unattainable limiting case.en_US
dc.description.sponsorshipThe author is particularly indebted to Ph. Boucaud, J.P Leroy, A. Le Yaouanc, J. Micheli and O. Pene for very fruitful discussions at the initial stages of the work and to J. Papavassiliou and A. C. Aguilar also for very valuable discussions and comments, and specially for providing me with some unpublished results which were exploited in this paper. J. R-Q also acknowledges the Spanish MICINN for the support by the research project FPA2009-10773 and "Junta de Andalucia" by P07FQM02962.
dc.language.isoengen_US
dc.publisherSpringer Verlagen_US
dc.rightsAn error occurred on the license name.*
dc.rights.uriAn error occurred getting the license - uri.*
dc.subject.otherPhenomenological Modelsen_US
dc.subject.otherQCDen_US
dc.titleOn the massive gluon propagator, the PT-BFM scheme and the low-momentum behaviour of decoupling and scaling DSE solutionsen_US
dc.identifier.doi10.1007/JHEP01(2011)105
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessen_US
dc.relation.projectIDinfo:eu-repo/grantAggreement/Spanish MICINN [FPA2009-10773]
dc.relation.projectIDinfo:eu-repo/grantAggreement/Junta de Andalucia [P07FQM02962]


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