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Testing chiral effective theory with quenched lattice QCD

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Testing chiral effective theory with quenched lattice QCD

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dc.contributor.author	Giusti, L.
dc.contributor.author	Hernández Gamazo, Pilar
dc.contributor.author	Necco, Silvia
dc.contributor.author	Pena Ruano, Carlos
dc.contributor.author	Wennekers, Jan
dc.contributor.author	Wittig, Hartmut
dc.date.accessioned	2015-04-24T10:40:47Z
dc.date.available	2015-04-24T10:40:47Z
dc.date.issued	2008
dc.identifier.citation	Giusti, L. Hernández Gamazo, Pilar Necco, Silvia Pena Ruano, Carlos Wennekers, Jan Wittig, Hartmut 2008 Testing chiral effective theory with quenched lattice QCD Journal of High Energy Physics 2008 5 024
dc.identifier.uri	http://hdl.handle.net/10550/43370
dc.description.abstract	We investigate two-point correlation functions of left-handed currents computed in quenched lattice QCD with the Neuberger-Dirac operator. We consider two lattice spacings a~0.09,0.12 fm and two different lattice extents L~ 1.5, 2.0 fm; quark masses span both the p- and the epsilon-regimes. We compare the results with the predictions of quenched chiral perturbation theory, with the purpose of testing to what extent the effective theory reproduces quenched QCD at low energy. In the p-regime we test volume and quark mass dependence of the pseudoscalar decay constant and mass; in the epsilon-regime, we investigate volume and topology dependence of the correlators. While the leading order behaviour predicted by the effective theory is very well reproduced by the lattice data in the range of parameters that we explored, our numerical data are not precise enough to test next-to-leading order effects.
dc.language.iso	eng
dc.relation.ispartof	Journal of High Energy Physics, 2008, vol. 2008, num. 5, p. 024
dc.subject	Física
dc.title	Testing chiral effective theory with quenched lattice QCD
dc.type	journal article	es_ES
dc.date.updated	2015-04-24T10:40:47Z
dc.identifier.doi	10.1088/1126-6708/2008/05/024
dc.identifier.idgrec	050039
dc.rights.accessRights	open access	es_ES