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arXiv · 1310.4087

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

Ph. Boucaud·M. Brinet·F. De Soto·V. Morenas·O. Pène·K. Petrov·J. Rodríguez-Quintero
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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.

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Ph. Boucaud, M. Brinet, F. De Soto, V. Morenas, O. Pène, K. Petrov, J. Rodríguez-Quintero. 2014-01-31. Three-gluon running coupling from lattice QCD at $N_f=2+1+1$: a consistency check of the OPE approach. https://doi.org/10.1007/jhep04(2014)086

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