Extracting gluon condensate from the average plaquette
arXiv:1503.07988 · doi:10.1016/j.nuclphysbps.2015.01.039
Abstract
The perturbative contribution in the average plaquette is subtracted using Borel summation and the remnant of the plaquette is shown to scale as a dim-4 condensate. A critical review is presented of the renormalon subtraction scheme that claimed a dim-2 condensate. The extracted gluon condensate is compared with the latest result employing high order (35-loop) calculation in the stochastic perturbation theory.
4 pages, Talk given at QCD14, the 17th International QCD Conference, 30 June--4 July 2014, Montpellier (France), to appear in the Proceedings