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Testing chiral effective theory with quenched lattice QCD

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dc.contributor European Commission
dc.contributor Consejo Superior de Investigaciones Científicas (España)
dc.contributor Ministerio de Educación y Ciencia (España)
dc.contributor Generalidad Valenciana
dc.creator Giusti, Leonardo
dc.creator Hernández Gamazo, Pilar
dc.creator Necco, Silvia
dc.creator Pena, Carlos Roberto
dc.creator Wennekers, J.
dc.creator Wittig, H.
dc.date 2008-07-06T18:54:25Z
dc.date 2008-07-06T18:54:25Z
dc.date 2008-05-08
dc.date.accessioned 2017-01-31T02:40:45Z
dc.date.available 2017-01-31T02:40:45Z
dc.identifier Journal of High Energy Physics 5: 024 (2008)
dc.identifier 1029-8479
dc.identifier http://hdl.handle.net/10261/5593
dc.identifier 10.1088/1126-6708/2008/05/024
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5593
dc.description 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.description S. N. is supported by Marie Curie Fellowship MEIF-CT-2006-025673. S. N. and P. H. aknowledge partial support by Spanish Ministry for Education and Science under grant FPA2004- 00996 and Generalitat Valenciana under grant GVACOMP2007-156. C. P. acknowledges support from the Ramón y Cajal Programme, as well as by the research grant FPA2006-05807 and the Consolider-Ingenio 2010 Programme CPAN (CSD2007-00042) of the Spanish Ministry for Education and Science. L. G., P. H., S. N. and H. W. are partially supported by EC Sixth Framework Program under the contract MRTN-CT-2006-035482 (FLAVIAnet).
dc.description Peer reviewed
dc.format 249992 bytes
dc.format application/pdf
dc.language eng
dc.publisher Institute of Physics Publishing
dc.relation Publisher's version
dc.relation http://dx.doi.org/10.1088/1126-6708/2008/05/024
dc.rights openAccess
dc.subject Chiral Lagrangians
dc.subject Lattice QCD
dc.subject QCD
dc.title Testing chiral effective theory with quenched lattice QCD
dc.type Artículo

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