Gribov copies, lattice QCD and the gluon propagator
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/4444 https://doi.org/10.1016/j.nuclphysb.2004.04.020 |
Resumo: | We address the problem of Gribov copies in lattice QCD. The gluon propagator is computed, in the Landau gauge, using 302 ([beta]=5.8) 124 SU(3) configurations gauge fixed to different copies. The results of the simulation shows that: (i) the effect of Gribov copies is small (less than 10%); (ii)Â Gribov copies change essentially the lowest momenta components (q<2.6 GeV); (iii) within the statistical accuracy of our simulation, the effect of Gribov copies is resolved if statistical errors are multiplied by a factor of two or three. Moreover, when modelling the gluon propagator, different sets of Gribov copies produce different sets of parameters not, necessarily, compatible within one standard deviation. Finally, our data supports a gluon propagator which, for large momenta, behaves like a massive gluon propagator with a mass of 1.1 GeV. |
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Gribov copies, lattice QCD and the gluon propagatorLattice QCDLandau gaugeGauge fixingGribov copiesGluon propagatorGluon massWe address the problem of Gribov copies in lattice QCD. The gluon propagator is computed, in the Landau gauge, using 302 ([beta]=5.8) 124 SU(3) configurations gauge fixed to different copies. The results of the simulation shows that: (i) the effect of Gribov copies is small (less than 10%); (ii)Â Gribov copies change essentially the lowest momenta components (q<2.6 GeV); (iii) within the statistical accuracy of our simulation, the effect of Gribov copies is resolved if statistical errors are multiplied by a factor of two or three. Moreover, when modelling the gluon propagator, different sets of Gribov copies produce different sets of parameters not, necessarily, compatible within one standard deviation. Finally, our data supports a gluon propagator which, for large momenta, behaves like a massive gluon propagator with a mass of 1.1 GeV.http://www.sciencedirect.com/science/article/B6TVC-4CDJ80P-2/1/756ee6b978f0c2ae3dc804289ab89a322004info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4444http://hdl.handle.net/10316/4444https://doi.org/10.1016/j.nuclphysb.2004.04.020engNuclear Physics B. 690:1-2 (2004) 177-198Silva, P. J.Oliveira, O.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T16:49:24Zoai:estudogeral.uc.pt:10316/4444Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:36.781802Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Gribov copies, lattice QCD and the gluon propagator |
title |
Gribov copies, lattice QCD and the gluon propagator |
spellingShingle |
Gribov copies, lattice QCD and the gluon propagator Silva, P. J. Lattice QCD Landau gauge Gauge fixing Gribov copies Gluon propagator Gluon mass |
title_short |
Gribov copies, lattice QCD and the gluon propagator |
title_full |
Gribov copies, lattice QCD and the gluon propagator |
title_fullStr |
Gribov copies, lattice QCD and the gluon propagator |
title_full_unstemmed |
Gribov copies, lattice QCD and the gluon propagator |
title_sort |
Gribov copies, lattice QCD and the gluon propagator |
author |
Silva, P. J. |
author_facet |
Silva, P. J. Oliveira, O. |
author_role |
author |
author2 |
Oliveira, O. |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Silva, P. J. Oliveira, O. |
dc.subject.por.fl_str_mv |
Lattice QCD Landau gauge Gauge fixing Gribov copies Gluon propagator Gluon mass |
topic |
Lattice QCD Landau gauge Gauge fixing Gribov copies Gluon propagator Gluon mass |
description |
We address the problem of Gribov copies in lattice QCD. The gluon propagator is computed, in the Landau gauge, using 302 ([beta]=5.8) 124 SU(3) configurations gauge fixed to different copies. The results of the simulation shows that: (i) the effect of Gribov copies is small (less than 10%); (ii)Â Gribov copies change essentially the lowest momenta components (q<2.6 GeV); (iii) within the statistical accuracy of our simulation, the effect of Gribov copies is resolved if statistical errors are multiplied by a factor of two or three. Moreover, when modelling the gluon propagator, different sets of Gribov copies produce different sets of parameters not, necessarily, compatible within one standard deviation. Finally, our data supports a gluon propagator which, for large momenta, behaves like a massive gluon propagator with a mass of 1.1 GeV. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/4444 http://hdl.handle.net/10316/4444 https://doi.org/10.1016/j.nuclphysb.2004.04.020 |
url |
http://hdl.handle.net/10316/4444 https://doi.org/10.1016/j.nuclphysb.2004.04.020 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Nuclear Physics B. 690:1-2 (2004) 177-198 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
aplication/PDF |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799133887766462464 |