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

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Three-gluon running coupling from lattice QCD at N f igual 2mas 1mas 1dospuntos A consistency check of the OPE approach.pdf (196.97 KB)

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URI: http://hdl.handle.net/10433/1007
DOI: 10.1007/JHEP04(2014)086

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2014-04

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Boucaud, P.
Brinet, M.
Morenas, V.
Pène, O.
Petrov, K.
Rodríguez-Quintero, J.

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Springer Verlag
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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 ¿A 2¿ condensate is used to fit the running of the coupling. We argue that the agreement in the predicted ¿A 2¿ 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
Momentum substraction schemes

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Journal of High Energy Physics, 2014 (4), art. no. 086

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