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Artículo
Instantons and the ⟨A2⟩ condensate
(American Physical Society, 2002-12-01)
We argue that the ⟨A2OPE⟩ condensate found in the Landau gauge on lattices, when an operator product expansion of Green’s functions is performed, might be explained by instantons. We use cooling to estimate the instanton ...
Artículo
Transparent expression of the A2 condensate’s renormalization
(American Physical Society, 2003-12-01)
We give a more transparent understanding of the vacuum expectation value of the renormalized local operator A2 by relating it to the gluon propagator integrated over the momentum. The quadratically divergent perturbative ...