Infrared behaviour of propagators and vertices.

Journal Article · Thu Nov 19 04:00:00 EST 1998 · Phys. Lett. B

DOI:https://doi.org/10.1016/S0370-2693(98)01105-8· OSTI ID:942335

Hawes, F T; Maris, P; Roberts, C D

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{sup 2}):= 1/[1+Pi(k{sup 2})], where Pi(k{sup 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{sup 2}=0)=0 and Max[P(k{sup 2})]{approx}10 neither confine quarks nor break chiral symmetry dynamically. This class includes all existing estimates of P(k{sup 2}) via numerical simulations.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: ER
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 942335
• Report Number(s): ANL/PHY/JA-30412
• Journal Information: Phys. Lett. B, Journal Name: Phys. Lett. B Journal Issue: 3-4 ; Nov. 19, 1998 Vol. 440; ISSN PYLBAJ; ISSN 0370-2693
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
CONFINEMENT
GLUONS
PROPAGATOR
QUARKS