Three-gluon running coupling from lattice QCD at $N_f=2+1+1$: a consistency check of the OPE approach - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Journal of High Energy Physics Year : 2014

Three-gluon running coupling from lattice QCD at $N_f=2+1+1$: a consistency check of the OPE approach

Abstract

We present a lattice calculation of the renormalized running coupling constant in symmetric (MOM) and asymmetric ($\widetilde{\rm MOM}$) momentum substraction schemes including $u$, $d$, $s$ and $c$ quarks in the sea. An Operator Product Expansion dominated by the dimension-two $\langle A^2\rangle$ condensate is used to fit the running of the coupling. We argue that the agreement in the predicted $\langle A^2\rangle$ condensate for both schemes is a strong support for the validity of the OPE approach and the effect of this non-gauge invariant condensate over the running of the strong coupling.

Dates and versions

in2p3-00873576 , version 1 (16-10-2013)

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Cite

Ph. Boucaud, M. Brinet, F. de Soto, Vincent Morenas, O. Pène, et al.. Three-gluon running coupling from lattice QCD at $N_f=2+1+1$: a consistency check of the OPE approach. Journal of High Energy Physics, 2014, 04, pp.086. ⟨10.1007/JHEP04(2014)086⟩. ⟨in2p3-00873576⟩
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