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Nucleon and delta masses in QCD
Using the positivity of the path integral measure of and defining a
structure for the quark propagator in a background field according to the
fluxon scenario for confinement, we calculate and compare the correlators for
nucleon and delta. From their shape we elucidate about the origin of their mass
difference, which in our simplified scenario is due to the tensor structure in
the propagator. This term arises due to a dynamical mechanism which is
responsible simultaneously for confinement and spontaneous chiral symmetry
breaking. Finally we discuss, by comparing the calculated correlators with the
Lehmann representation, the possibility that a strong CP and/or P violation
occurs as a consequence of a specific mechanism for confinement.Comment: Latex, FTUV/92-2
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