Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/44811
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Type: | Journal article |
Title: | Landau gauge gluon and ghost propagators from lattice QCD |
Author: | Ilgenfritz, E. Muller-Preussker, M. Sternbeck, A. Schiller, A. Bogolubsky, I. |
Citation: | Brazilian Journal of Physics, 2007; 37(1 B):193-200 |
Publisher: | Sociedade Brasileira Fisica |
Issue Date: | 2007 |
ISSN: | 0103-9733 0103-9733 |
Statement of Responsibility: | E.-M. Ilgenfritz; M. Müller-Preussker; A. Sternbeck; A. Schiller and I. L. Bogolubsky |
Abstract: | We report on recent numerical computations of the Landau gauge gluon and ghost propagators as well as of the ghost-gluon-vertex function in pure SU(3) Yang-Mills theory and in full QCD on the lattice. Special emphasis is paid to the low momentum region. In particular, we present new data for the gluon propagator at momenta below 300 MeV. We also discuss different systematic effects as there are finite-size, lattice discretization and Gribov copy but also unquenching effects. A MOM-scheme running coupling as(q2) based on the ghost-gluon vertex is calculated and found to decrease for momenta below 550 MeV, even though the renormalization constant of the vertex deviates only weakly from being constant. |
Keywords: | Lattice gauge theory Landau gauge Gluon propagator Ghost propagator Running coupling |
Rights: | © 2007 Sociedade Brasileira de Física |
DOI: | 10.1590/S0103-97332007000200006 |
Published version: | http://dx.doi.org/10.1590/s0103-97332007000200006 |
Appears in Collections: | Aurora harvest 6 Chemistry and Physics publications |
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hdl_44811.pdf | 390.57 kB | Adobe PDF | View/Open |
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