Exploratory Study of the 3-Gluon Vertex on the Lattice

Details Exploratory Study of the 3-Gluon Vertex on the Lattice Exploratory Study of the 3-Gluon Vertex on the Lattice

1994-05-26

arxiv.org/abs/hep-lat/9405024v1

Phys.Rev.D50:4247-4251,1994

Physics

High Energy Physics

High Energy Physics - Lattice

11 pages, PostScript paper + 8 pictures wrapped in a Unix shell archive, Edinburgh U. 94/543

Scientific paper

10.1103/PhysRevD.50.R4247

We define and evaluate on the lattice the amputated 3-gluon vertex function in momentum space. We give numerical results for $16^3 \times 40$ and $24^3 \times 40$ quenched lattices at $\beta=6.0$. A good numerical signal is obtained, at the price of enforcing the gauge-fixing condition with high accuracy. By comparing results from two different lattice volumes, we try to investigate the crucial issue of finite volume effects. We also outline a method for the lattice evaluation of the QCD running coupling constant as defined from the 3-gluon vertex, while being aware that a realistic calculation will require larger $\beta$ values and very high statistics.

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