QCD effective charges from lattice data
NAGIOS: RODERIC FUNCIONANDO

QCD effective charges from lattice data

DSpace Repository

QCD effective charges from lattice data

Show simple item record

dc.contributor.author Aguilar, Arlene Cristina
dc.contributor.author Binosi, Daniele
dc.contributor.author Papavassiliou, Joannis
dc.date.accessioned 2015-04-23T07:25:13Z
dc.date.available 2015-04-23T07:25:13Z
dc.date.issued 2010
dc.identifier.uri http://hdl.handle.net/10550/43287
dc.description.abstract We use recent lattice data on the gluon and ghost propagators, as well as the Kugo-Ojima function, in order to extract the non-perturbative behavior of two particular definitions of the QCD effective charge, one based on the pinch technique construction, and one obtained from the standard ghost-gluon vertex. The construction relies crucially on the definition of two dimensionful quantities, which are invariant under the renormalization group, and are built out of very particular combinations of the aforementioned Green's functions. The main non-perturbative feature of both effective charges, encoded in the infrared finiteness of the gluon propagator and ghost dressing function used in their definition, is the freezing at a common finite (non-vanishing) value, in agreement with a plethora of theoretical and phenomenological expectations. We discuss the sizable discrepancy between the freezing values obtained from the present lattice analysis and the corresponding estimates derived from several phenomenological studies, and attribute its origin to the difference in the gauges employed. A particular toy calculation suggests that the modifications induced to the non-perturbative gluon propagator by the gauge choice may indeed account for the observed deviation of the freezing values.
dc.language.iso eng
dc.relation.ispartof Journal of High Energy Physics, 2010, vol. 010, num. 7, p. 002
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Aguilar, Arlene Cristina Binosi, Daniele Papavassiliou, Joannis 2010 QCD effective charges from lattice data Journal of High Energy Physics 010 7 002
dc.subject Física
dc.title QCD effective charges from lattice data
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-04-23T07:25:13Z
dc.identifier.doi http://dx.doi.org/10.1007/JHEP07(2010)002
dc.identifier.idgrec 062074

View       (638.6Kb)

This item appears in the following Collection(s)

Show simple item record

Search DSpace

Advanced Search

Browse

Statistics