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Quark-gluon vertex model and lattice-QCD data

M.S. Bhagwat
(
- Kent State U.
)
,
P.C. Tandy
(
- Kent State U.
)

Jul, 2004

4 pages

Published in:

Phys.Rev.D 70 (2004) 094039

e-Print:

hep-ph/0407163 [hep-ph]

DOI:

10.1103/PhysRevD.70.094039

Report number:

KSUCNR-204-03

View in:

ADS Abstract Service

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Abstract:

A model for the dressed quark-gluon vertex, at zero gluon momentum, is formed from a nonperturbative extension of the two Feynman diagrams that contribute at 1-loop in perturbation theory. The required input is an existing ladder-rainbow model Bethe-Salpeter kernel from an approach based on the Dyson-Schwinger equations: no new parameters are introduced. The model includes an Ansatz for the triple-gluon vertex. Two of the three vertex amplitudes from the model provide a point-wise description of the recent quenched lattice-QCD data. An estimate of the effects of quenching is made.

11.15.\x{2013}q
12.38.Gc
12.38.Lg
quark gluon: vertex function
Feynman graph
nonperturbative
perturbation theory: higher-order
Bethe-Salpeter equation
Dyson-Schwinger equation
amplitude analysis

References(19)

Figures(0)

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