Ghost-gluon coupling, power corrections and Ams from lattice QCD with a dynamical charm

Blossier, B.; Boucaud, Ph.; Brinet, M.; Soto Borrero, Feliciano Carlos de; Du, X.; Gravina, M.; Morenas, V.; Pène, O.; Petrov, K.; Rodríguez Quintero, José

doi:10.1103/PhysRevD.85.034503

Author

Blossier, B.; Boucaud, Ph.; Brinet, M.; Soto Borrero, Feliciano Carlos de; Du, X.; [et al.]
Publication Date

2012
Publisher

American Physical Society
Citation

Blossier, B., Boucaud, Ph., Brinet, M., Soto Borrero, F.C., Du, X., Gravina, M., Morenas, V., Pène, O., Petrov, K., Rodríguez Quintero, J.: "Ghost-gluon coupling, power corrections and Ams from lattice QCD with a dynamical charm". Physical Review D. Vol. 85, n. 3, (2012). DOI: 10.1103/PhysRevD.85.034503
Abstract

We present results concerning the nonperturbative evaluation of the ghost-gluon running QCD coupling constant from Nf=2 twisted-mass lattice calculations. A novel method for calibrating the lattice spacing, independent of the string tension and hadron spectrum, is presented with results in agreement with previous estimates. The value of Λ¯¯¯¯¯¯MS is computed from the running of the QCD coupling only after extrapolating to zero dynamical quark mass and after removing a nonperturbative operator-product expansion contribution that is assumed to be dominated by the dimension-two ⟨A2⟩ gluon condensate. The effect due to the dynamical quark mass in the determination of Λ¯¯¯¯¯¯MS is discussed.
URI

http://hdl.handle.net/10272/13425
Project

info:eu-repo/grantAgreement/Junta de Andalucia [P07FQM02962]info:eu-repo/grantAgreement/Spanish MICINN [FPA2009-10773]

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Ghost-gluon coupling, power corrections and Ams from lattice QCD with a dynamical charm

Author

Blossier, B.; Boucaud, Ph.; Brinet, M.; Soto Borrero, Feliciano Carlos de; Du, X.; [et al.]

Publication Date

2012

Publisher

American Physical Society

Citation

Blossier, B., Boucaud, Ph., Brinet, M., Soto Borrero, F.C., Du, X., Gravina, M., Morenas, V., Pène, O., Petrov, K., Rodríguez Quintero, J.: "Ghost-gluon coupling, power corrections and Ams from lattice QCD with a dynamical charm". Physical Review D. Vol. 85, n. 3, (2012). DOI: 10.1103/PhysRevD.85.034503

Abstract

We present results concerning the nonperturbative evaluation of the ghost-gluon running QCD coupling constant from Nf=2 twisted-mass lattice calculations. A novel method for calibrating the lattice spacing, independent of the string tension and hadron spectrum, is presented with results in agreement with previous estimates. The value of Λ¯¯¯¯¯¯MS is computed from the running of the QCD coupling only after extrapolating to zero dynamical quark mass and after removing a nonperturbative operator-product expansion contribution that is assumed to be dominated by the dimension-two ⟨A2⟩ gluon condensate. The effect due to the dynamical quark mass in the determination of Λ¯¯¯¯¯¯MS is discussed.

URI

http://hdl.handle.net/10272/13425

Project

info:eu-repo/grantAgreement/Junta de Andalucia [P07FQM02962]info:eu-repo/grantAgreement/Spanish MICINN [FPA2009-10773]

Fichero	Tamaño	Formato	Ver	Description
Ghost-gluon coupling.pdf	569.0Kb	PDF	View/Open	versión editor

Fichero	Tamaño	Formato	Ver	Description
Ghost-gluon coupling.pdf	569.0Kb	PDF	View/Open	versión editor

This item appears in the following Collection(s)

DFA - Artículos