Vertex functions and infrared fixed point in Landau gauge SU(N) Yang-Mills theory - INSPIRE

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Vertex functions and infrared fixed point in Landau gauge SU(N) Yang-Mills theory

Reinhard Alkofer
(
- Tubingen U.
)
,
Christian S. Fischer
(
- Durham U., IPPP
)
,
Felipe J. Llanes-Estrada
(
- Madrid U.
)

Dec, 2004

13 pages

Published in:

Phys.Lett.B 611 (2005) 279-288,
Phys.Lett.B 670 (2009) 460-461 (erratum)

e-Print:

hep-th/0412330 [hep-th]

DOI:

10.1016/j.physletb.2008.11.068 (erratum),
10.1016/j.physletb.2005.02.043

Report number:

UNITU-THEP-22-04,
IPPP-04-89,
DCPT-04-178

View in:

reference search224 citations

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Abstract:

The infrared behaviour of vertex functions in an SU(N) Yang-Mills theory in Landau gauge is investigated employing a skeleton expansion of the Dyson-Schwinger equations. The three- and four-gluon vertices become singular if and only if all external momenta vanish while the dressing of the ghost-gluon vertex remains finite in this limit. The running coupling as extracted from either of these vertex functions possesses an infrared fixed point. In general, diagrams including ghost-loops dominate in the infrared over purely gluonic ones.

11.15.Tk
12.38.Aw
02.30.Rz
14.70.Dj
12.38.Lg
Confinement
Universality
Nonperturbative QCD
Running coupling
Dyson-Schwinger equations

References(42)

Figures(0)

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