Instantons and the A2 condensate
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Boucaud, P.
Leroy, J. P.
Le Yaouanc, A.
Micheli, J.
Pène, O.
Donini, A.
Moutarde, H.
Rodríguez-Quintero, J.
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American Physical Society
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Abstract
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 contribution and extrapolate back the result to the thermalized configuration. The resulting A2inst is similar to A2OPE.
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Physical Review D - Particles, Fields, Gravitation and Cosmology, 66 (3), art. no. 034504