RT Journal Article
T1 Ghost-gluon coupling, power corrections, and ^MS¯¯¯¯¯ from twisted-mass lattice QCD at Nf=2
A1 de Soto, Feliciano
A1 Blossier, B.
A1 Boucaud, P.
A1 Morenas, V.
A1 Gravina, M.
A1 Pène, O.
A1 Rodríguez-Quintero, J.
K1 Ghost-gluon coupling
K1 Lattice
AB 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 ^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  ^MS¯¯¯¯¯¯ is discussed.
PB American Physical Society
SN 1550-7998
YR 2010
FD 2010-08
LK http://hdl.handle.net/10433/1001
UL http://hdl.handle.net/10433/1001
LA en
NO Physical Review D - Particles, Fields, Gravitation and Cosmology, 82 (3), art. no. 034510
NO Universidad Pablo de Olavide. Departamento de Sistemas Físicos, Químicos y Naturales
DS RIO
RD May 6, 2026