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26 April 2024 |
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Gauge-variant propagators and the running coupling from lattice QCD | | E.-M. Ilgenfritz
; M. Müller-Preussker
; A. Sternbeck
; A. Schiller
; | | Date: |
21 Jan 2006 | | Abstract: | On the occasion of the 70th birthday of Prof. Adriano Di Giacomo we report on recent numerical computations of the Landau gauge gluon and ghost propagators as well as of a non-symmetric MOM-scheme ghost-gluon vertex in quenched and full lattice QCD. Special emphasis is paid to the Gribov copy problem and to the unquenching effect. The corresponding running coupling alpha_s(q^2) is found and shown to decrease for q^2 le 0.3 GeV^2 in the infrared limit. No indication for a non-trivial infrared fixed point is seen in agreement with findings from truncated systems of Dyson-Schwinger equations treated on a four-dimensional torus. | | Source: | arXiv, hep-lat/0601027 | | Services: | Forum | Review | PDF | Favorites | |
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