Vacuum expectation value of A^2 from LQCD
hep-lat
/ Authors
O. Pène, B. Blossier, Ph. Boucaud, A. Le Yaouanc, J. P. Leroy, J. Micheli, M. Brinet, M. Gravina, F. De Soto, Z. Liu
and 3 more authors
/ Abstract
We argue from LQCD that there is a non vanishing v.e.v of $A_a^μA^a_μ$ in QCD in the Landau gauge. We use operator product expansion to provide a clear definition of $A_a^μA^a_μ$ and extract a number both in the quenched and unquenched case.