Preliminary calculation of αs from Green functions with dynamical quarks

We present preliminary results on the computation of the QCD running cou- pling constant in the ^MOM scheme and Landau gauge with two flavours of dynamical Wilson quarks. Gluon momenta range up to about 7GeV (β = 5.6, 5.8 and 6.0) with a constant dynamical-quark mass. This range already allows to ex...

Descripción completa

Detalles Bibliográficos
Autores: Boucaud, Philippe, Leroy, Jean Pierre, Micheli, Jacques, Pène, Olivier, Moutarde, Hervé, Roiesnel, Claude, Rodríguez Quintero, José
Tipo de recurso: artículo
Fecha de publicación:2002
País:España
Institución:Universidad de Huelva (UHU)
Repositorio:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:inglés
OAI Identifier:oai:ariasmontano.uhu.es:10272/18767
Acceso en línea:http://hdl.handle.net/10272/18767
Access Level:acceso abierto
Palabra clave:Nonperturbative Effects
Quark Masses and SM parameters
QCD
Lattice QCD
id ES_9388fbff0cfe2c84c38cf43c7aec99cf
oai_identifier_str oai:ariasmontano.uhu.es:10272/18767
network_acronym_str ES
network_name_str España
repository_id_str
spelling Preliminary calculation of αs from Green functions with dynamical quarksBoucaud, PhilippeLeroy, Jean PierreMicheli, JacquesPène, OlivierMoutarde, HervéRoiesnel, ClaudeRodríguez Quintero, JoséNonperturbative EffectsQuark Masses and SM parametersQCDLattice QCDWe present preliminary results on the computation of the QCD running cou- pling constant in the ^MOM scheme and Landau gauge with two flavours of dynamical Wilson quarks. Gluon momenta range up to about 7GeV (β = 5.6, 5.8 and 6.0) with a constant dynamical-quark mass. This range already allows to exhibit some evidence for a sizable 1/μ2 correction to the asymptotic behaviour, as in the quenched approximation, although a fit without power corrections is still possible with a reasonable χ2. Following the conclusions of our quenched study, we take into account 1/μ2 correction to the asymptotic behaviour. We find ¤ Nf=2 MS = 264(27)MeV × [a−1(5.6, 0.1560)/2.19GeV], which leads to αs(MZ) = 0.113(3)(4). The latter result has to be taken as a preliminary indication rather than a real prediction in view of the systematic errors still to be controlled. Still, being two sigmas below the experimental result makes it very encouraging.20022002-01-0120022002-01-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10272/18767reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/187672026-06-02T14:58:11Z
dc.title.none.fl_str_mv Preliminary calculation of αs from Green functions with dynamical quarks
title Preliminary calculation of αs from Green functions with dynamical quarks
spellingShingle Preliminary calculation of αs from Green functions with dynamical quarks
Boucaud, Philippe
Nonperturbative Effects
Quark Masses and SM parameters
QCD
Lattice QCD
title_short Preliminary calculation of αs from Green functions with dynamical quarks
title_full Preliminary calculation of αs from Green functions with dynamical quarks
title_fullStr Preliminary calculation of αs from Green functions with dynamical quarks
title_full_unstemmed Preliminary calculation of αs from Green functions with dynamical quarks
title_sort Preliminary calculation of αs from Green functions with dynamical quarks
dc.creator.none.fl_str_mv Boucaud, Philippe
Leroy, Jean Pierre
Micheli, Jacques
Pène, Olivier
Moutarde, Hervé
Roiesnel, Claude
Rodríguez Quintero, José
author Boucaud, Philippe
author_facet Boucaud, Philippe
Leroy, Jean Pierre
Micheli, Jacques
Pène, Olivier
Moutarde, Hervé
Roiesnel, Claude
Rodríguez Quintero, José
author_role author
author2 Leroy, Jean Pierre
Micheli, Jacques
Pène, Olivier
Moutarde, Hervé
Roiesnel, Claude
Rodríguez Quintero, José
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Nonperturbative Effects
Quark Masses and SM parameters
QCD
Lattice QCD
topic Nonperturbative Effects
Quark Masses and SM parameters
QCD
Lattice QCD
description We present preliminary results on the computation of the QCD running cou- pling constant in the ^MOM scheme and Landau gauge with two flavours of dynamical Wilson quarks. Gluon momenta range up to about 7GeV (β = 5.6, 5.8 and 6.0) with a constant dynamical-quark mass. This range already allows to exhibit some evidence for a sizable 1/μ2 correction to the asymptotic behaviour, as in the quenched approximation, although a fit without power corrections is still possible with a reasonable χ2. Following the conclusions of our quenched study, we take into account 1/μ2 correction to the asymptotic behaviour. We find ¤ Nf=2 MS = 264(27)MeV × [a−1(5.6, 0.1560)/2.19GeV], which leads to αs(MZ) = 0.113(3)(4). The latter result has to be taken as a preliminary indication rather than a real prediction in view of the systematic errors still to be controlled. Still, being two sigmas below the experimental result makes it very encouraging.
publishDate 2002
dc.date.none.fl_str_mv 2002
2002-01-01
2002
2002-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10272/18767
url http://hdl.handle.net/10272/18767
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869413605358698496
score 15.81155

Similares en LA Referencia