Quark propagation in the presence of a <A{sub {mu}}{sup a}A{sub a}{sup {mu}}> condensate

Journal Article · Wed Dec 01 00:00:00 EST 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.114011· OSTI ID:20698122

Xiangdong, Li; Shakin, C M ^[1]

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1. Department of Computer System Technology, New York City College of Technology of the City University of New York, Brooklyn, New York 11201 (United States)

There is a good deal of current interest in the condensate <g{sup 2}A{sub {mu}}{sup a}A{sub a}{sup {mu}}> which has recently be shown to be the Landau gauge version of a more general gauge-invariant expression. In the present work we consider quark propagation in the presence of such a condensate which we assume to be present in the vacuum. We describe the vacuum as a random medium of gluon fields. We discuss quark propagation in that medium and show that the quark propagator has no on-mass-shell pole indicating that a quark cannot propagate over extended distances. That is, the quark is a nonpropagating mode in the gluon condensate.

• OSTI ID: 20698122
• Journal Information: Physical Review. D, Particles Fields, Vol. 70, Issue 11; Other Information: DOI: 10.1103/PhysRevD.70.114011; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DISTANCE
GAUGE INVARIANCE
GLUON CONDENSATION
GLUONS
PROPAGATOR
QUARKS
RANDOMNESS