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Ghost-gluon coupling, power corrections and $\Lambda_{\bar{MS}}$ from twisted-mass lattice QCD at $N_f=2$

Abstract : A non-perturbative calculation of the ghost-gluon running QCD coupling constant is performed using $N_f=2$ twisted-mass dynamical fermions. The extraction of $\Lambda_{\bar{MS}}$ in the chiral limit reveals the presence of a non-perturbative OPE contribution that is assumed to be dominated by a dimension-two $\VEV{A^2}$ condensate. In this contest a novel method for calibrating the lattice spacing in lattice simulations is presented.
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http://hal.in2p3.fr/in2p3-00584007
Contributor : Jeanine Pellet <>
Submitted on : Thursday, April 7, 2011 - 11:49:34 AM
Last modification on : Wednesday, September 16, 2020 - 4:05:08 PM

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  • HAL Id : in2p3-00584007, version 1
  • ARXIV : 1010.5724

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B. Blossier, Ph. Boucaud, F. de Soto, Vincent Morenas, M. Gravina, et al.. Ghost-gluon coupling, power corrections and $\Lambda_{\bar{MS}}$ from twisted-mass lattice QCD at $N_f=2$. XXVIII International Symposium on Lattice Field Theory 2010, Jun 2010, Villasimius, Italy. ⟨in2p3-00584007⟩

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