Bali GS, Bauer C, Pineda A. Model independent determination of the gluon condensate in four dimensional SU(3) gauge theory.
PHYSICAL REVIEW LETTERS 2014;
113:092001. [PMID:
25215978 DOI:
10.1103/physrevlett.113.092001]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Indexed: 06/03/2023]
Abstract
We determine the nonperturbative gluon condensate of four-dimensional SU(3) gauge theory in a model-independent way. This is achieved by carefully subtracting high-order perturbation theory results from nonperturbative lattice QCD determinations of the average plaquette. No indications of dimension-two condensates are found. The value of the gluon condensate turns out to be of a similar size as the intrinsic ambiguity inherent to its definition. We also determine the binding energy of a B meson in the heavy quark mass limit.
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