We present a perturbative approach to QCD based on quark composites, that is
barions and mesons, as fundamental variables.Comment: 4 pages LaTeX, to appear in the proceedings of ``Path Integrals from
  peV to TeV'', Florence-Italy, August 25-29, 199

Caracciolo, Sergio

De Franceschi, Gianni

Palumbo, Fabrizio

English

arXiv

n and the pion-pion interaction of the chiral models, while the quarks do not propagate. One way to perform the change of variables is to assume as new variables the nucleons at the sites of a sublattice of spacing 2a, and the chiral mesons at the sites of the staggered sublattice. We have no space to present such a unified treatment, and then we will illustrate the two cases separately, starting from the nucleons. Consider the QCD partition function Z =  Z  [dU ][d d] exp(\GammaS G \Gamma S q ) (1)  where SG is the pure gluon action and S q is the action of the quarks interacting with the gluons  S q (r; m q ; U) = a  4  X  x  ¯ (x)Q x;y (

Quark-composites approach to QCD

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