Testing chiral effective theory with quenched lattice QCD

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 c...

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Autores: Giusti, Leonardo, Hernández Gamazo, Pilar, Necco, Silvia, Pena, Carlos Roberto, Wennekers, J., Wittig, H.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2008
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/5593
Acceso en línea:http://hdl.handle.net/10261/5593
Access Level:acceso abierto
Palabra clave:Chiral lagrangians
Lattice QCD
QCD
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spelling Testing chiral effective theory with quenched lattice QCDGiusti, LeonardoHernández Gamazo, PilarNecco, SilviaPena, Carlos RobertoWennekers, J.Wittig, H.Chiral lagrangiansLattice QCDQCDWe 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.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).Peer reviewedInstitute of Physics PublishingEuropean CommissionConsejo Superior de Investigaciones Científicas (España)Ministerio de Educación y Ciencia (España)Generalitat ValencianaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]200820082008info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersion249992 bytesapplication/pdfhttp://hdl.handle.net/10261/5593reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1088/1126-6708/2008/05/024Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/55932026-05-22T06:33:51Z
dc.title.none.fl_str_mv Testing chiral effective theory with quenched lattice QCD
title Testing chiral effective theory with quenched lattice QCD
spellingShingle Testing chiral effective theory with quenched lattice QCD
Giusti, Leonardo
Chiral lagrangians
Lattice QCD
QCD
title_short Testing chiral effective theory with quenched lattice QCD
title_full Testing chiral effective theory with quenched lattice QCD
title_fullStr Testing chiral effective theory with quenched lattice QCD
title_full_unstemmed Testing chiral effective theory with quenched lattice QCD
title_sort Testing chiral effective theory with quenched lattice QCD
dc.creator.none.fl_str_mv Giusti, Leonardo
Hernández Gamazo, Pilar
Necco, Silvia
Pena, Carlos Roberto
Wennekers, J.
Wittig, H.
author Giusti, Leonardo
author_facet Giusti, Leonardo
Hernández Gamazo, Pilar
Necco, Silvia
Pena, Carlos Roberto
Wennekers, J.
Wittig, H.
author_role author
author2 Hernández Gamazo, Pilar
Necco, Silvia
Pena, Carlos Roberto
Wennekers, J.
Wittig, H.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv European Commission
Consejo Superior de Investigaciones Científicas (España)
Ministerio de Educación y Ciencia (España)
Generalitat Valenciana
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Chiral lagrangians
Lattice QCD
QCD
topic Chiral lagrangians
Lattice QCD
QCD
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.
publishDate 2008
dc.date.none.fl_str_mv 2008
2008
2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/5593
url http://hdl.handle.net/10261/5593
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1088/1126-6708/2008/05/024
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 249992 bytes
application/pdf
dc.publisher.none.fl_str_mv Institute of Physics Publishing
publisher.none.fl_str_mv Institute of Physics Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
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