A determination of <A^2> and the non-perturbative vacuum energy of Yang-Mills theory in the Landau gauge
arXiv:hep-th/0302128 · doi:10.1016/S0370-2693(03)00541-0
Abstract
We discuss the 2-point-particle-irreducible (2PPI) expansion, which sums bubble graphs to all orders, in the context of SU(N) Yang-Mills theory in the Landau gauge. Using the method we investigate the possible existence of a gluon condensate of mass dimension two, <A^2>, and the corresponding non-zero vacuum energy. This condensate gives rise to a dynamically generated mass for the gluon.
12 pages, 3 eps figures; v2 : wrong use of "enhancement" instead of "suppression" corrected; v3: version accepted for publication in Phys.Lett.B