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Article overview
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Infrared Behaviour of Propagators and Vertices | Frederick T. Hawes
; Pieter Maris
; Craig D. Roberts
; | Date: |
22 Jul 1998 | Journal: | Phys.Lett. B440 (1998) 353-358 | Subject: | nucl-th hep-lat hep-ph | Abstract: | We elucidate constraints imposed by confinement and dynamical chiral symmetry breaking on the infrared behaviour of the dressed-quark and -gluon propagators, and dressed-quark-gluon vertex. In covariant gauges the dressing of the gluon propagator is completely specified by P(k^2):= 1/[1+Pi(k^2)], where Pi(k^2) is the vacuum polarisation. In the absence of particle-like singularities in the dressed-quark-gluon vertex, extant proposals for the dressed-gluon propagator that manifest P(k^2=0)=0 and Max[P(k^2)]~10 neither confine quarks nor break chiral symmetry dynamically. This class includes all existing estimates of P(k^2) via numerical simulations. | Source: | arXiv, nucl-th/9807056 | Services: | Forum | Review | PDF | Favorites |
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