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      Instantons and the ⟨A2⟩ condensate 

      Boucaud, Ph.; Leroy, J. P.; Le Yaouanc, A.; Micheli, A.; Pène, Olivier; Soto, F. de; Donini, A.; Moutarde, H.; Rodríguez Quintero, J. (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 ...