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      An instanton picture O.P.E. (A2) condensate? 

      Rodríguez Quintero, José; Pène, Olivier; Moutarde, H.; Micheli, J.; Le Yaouanc, A.; Leroy, J. P.; Donini, A.; Boucaud, Ph.; Soto Borrero, Feliciano Carlos de (Elsevier, 2003)
      Gluon two- and three-point Green Functions computed in Landau gauge from the lattice show the existence of power corrections ...
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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 ...