Ghost propagator and ghost-gluon vertex from Schwinger-Dyson equations
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Ghost propagator and ghost-gluon vertex from Schwinger-Dyson equations

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Ghost propagator and ghost-gluon vertex from Schwinger-Dyson equations

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dc.contributor.author Aguilar, Arlene Cristina
dc.contributor.author Ibáñez Gil de Ramales, David
dc.contributor.author Papavassiliou, Joannis
dc.date.accessioned 2014-02-18T10:15:37Z
dc.date.available 2014-02-18T10:15:37Z
dc.date.issued 2013
dc.identifier.uri http://dx.doi.org/10.1103/PhysRevD.87.114020
dc.identifier.uri http://hdl.handle.net/10550/33027
dc.description.abstract We study an approximate version of the Schwinger-Dyson equation that controls the nonperturbative behavior of the ghost-gluon vertex in the Landau gauge. In particular, we focus on the form factor that enters in the dynamical equation for the ghost dressing function, in the same gauge, and derive its integral equation, in the 'one-loop dressed' approximation. We consider two special kinematic configurations, which simplify the momentum dependence of the unknown quantity; in particular, we study the soft gluon case and the well-known Taylor limit. When coupled with the Schwinger-Dyson equation of the ghost dressing function, the contribution of this form factor provides considerable support to the relevant integral kernel. As a consequence, the solution of this coupled system of integral equations furnishes a ghost dressing function that reproduces the standard lattice results rather accurately, without the need to artificially increase the value of the gauge coupling.
dc.relation.ispartof Physical Review D, 2013, vol. 87, num. 11, p. 114020
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Aguilar, A. C. Ibáñez, D. Papavassiliou, Joannis 2013 Ghost propagator and ghost-gluon vertex from Schwinger-Dyson equations Physical Review D 87 11 114020
dc.subject Física
dc.title Ghost propagator and ghost-gluon vertex from Schwinger-Dyson equations
dc.type info:eu-repo/semantics/article
dc.date.updated 2014-02-18T10:15:37Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.87.114020
dc.identifier.idgrec 091162

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