Confinement, Diquarks and Goldstone's theorem

Details Confinement, Diquarks and Goldstone's theorem Confinement, Diquarks and Goldstone's theorem

1996-09-16

arxiv.org/abs/nucl-th/9609039v1

Physics

Nuclear Physics

Nuclear Theory

7 pages, LaTeX, uses sprocl.sty and epsfig, contribution to the proceedings of ``Quark Confinement and the Hadron Spectrum''

Scientific paper

Determinations of the gluon propagator in the continuum and in lattice simulations are compared. A systematic truncation procedure for the quark Dyson-Schwinger and bound state Bethe-Salpeter equations is described. The procedure ensures the flavour-octet axial-vector Ward identity is satisfied order-by-order, thereby guaranteeing the preservation of Goldstone's theorem; and identifies a mechanism that simultaneously ensures the absence of diquarks in QCD and their presence in QCD$^{N_c=2}$, where the colour singlet diquark is the ``baryon'' of the theory.

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