A determination of and the non-perturbative vacuum energy of Yang-Mills theory in the Landau gauge

Authors:
  • DDD. Dudal
    D. Dudal
  • HVH. Verschelde
    H. Verschelde
  • RBR. E. Browne
    R. E. Browne
  • JGJ. A. Gracey
    J. A. Gracey
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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, , and the corresponding non-zero vacuum energy. This condensate gives rise to a dynamically generated mass for the gluon.