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

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Three-gluon running.pdf (443.99 KB)

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2014

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Ciencias Integradas

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http://hdl.handle.net/10272/10492

DOI

10.1007/JHEP04(2014)086

Abstract

We present a lattice calculation of the renormalized running coupling constant in symmetric (MOM) and asymmetric (^MOM) momentum substraction schemes including u, d, s and c quarks in the sea. An Operator Product Expansion dominated by the dimension-two hA2i condensate is used to fit the running of the coupling. We argue that the agreement in the predicted hA2i 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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Lattice QCD; Sum Rules; QCD

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Bibliographic citation

Boucaud, Ph., Brinet, M., Soto Borrero, F.C., Morenas, V., Pène, O., Petrov, K., Rodríguez Quintero, J.: "Three-gluon running coupling from lattice QCD at Nf = 2 + 1 + 1: a consistency check of the OPE approach". Journal of High Energy Physics. Vol. 2014, n. 4, (2014). ISSN 1029-8479

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