Effective gluon mass and infrared fixed point in QCD
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Effective gluon mass and infrared fixed point in QCD

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Effective gluon mass and infrared fixed point in QCD

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dc.contributor.author Aguilar, Arlene Cristina
dc.contributor.author Papavassiliou, Joannis
dc.date.accessioned 2015-04-22T11:50:20Z
dc.date.available 2015-04-22T11:50:20Z
dc.date.issued 2007
dc.identifier.uri http://hdl.handle.net/10550/43266
dc.description.abstract We report on a special type of solutions for the gluon propagator of pure QCD, obtained from the corresponding non-linear Schwinger-Dyson equation formulated in the Feynman gauge of the background field method. These solutions reach a finite value in the deep infrared and may be fitted using a massive propagator, with the crucial characteristic that the effective ``mass'' employed depends on the momentum transfer. Specifically, the gluon mass falls off as the inverse square of the momentum, as expected from the operator-product expansion. In addition, one may define a dimensionless quantity, which constitutes the generalization in a non-Abelian context of the universal QED effective charge. This strong effective charge displays asymptotic freedom in the ultraviolet whereas in the low-energy regime it freezes at a finite value, giving rise to an infrared fixed point for QCD.
dc.language.iso eng
dc.relation.ispartof AIP Conference Proceedings, 2007, vol. 964, p. 312-317
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Aguilar, Arlene Cristina Papavassiliou, Joannis 2007 Effective gluon mass and infrared fixed point in QCD AIP Conference Proceedings 964 312 317
dc.subject Física
dc.title Effective gluon mass and infrared fixed point in QCD
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-04-22T11:50:20Z
dc.identifier.doi http://dx.doi.org/10.1063/1.2823869
dc.identifier.idgrec 091158

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