Non-perturbative power corrections to ghost and gluon propagators
We study the dominant non-perturbative power corrections to the ghost and gluon propagators in Landau gauge pure Yang-Mills theory using OPE and lattice simulations. The leading order Wilson coefficients are proven to be the same for both propagators. The ratio of the ghost and gluon propagators is...
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Published in | The journal of high energy physics Vol. 2006; no. 1; p. 037 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
IOP Publishing
01.01.2006
Springer |
Subjects | |
Online Access | Get full text |
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Summary: | We study the dominant non-perturbative power corrections to the ghost and gluon propagators in Landau gauge pure Yang-Mills theory using OPE and lattice simulations. The leading order Wilson coefficients are proven to be the same for both propagators. The ratio of the ghost and gluon propagators is thus free from this dominant power correction. Indeed, a purely perturbative fit of this ratio gives smaller value ($\simeq 270$MeV) of $\Lambda_{\ms}$ than the one obtained from the propagators separately($\simeq 320$MeV). This argues in favour of significant non-perturbative $\sim 1/q^2$ power corrections in the ghost and gluon propagators. We check the self-consistency of the method. |
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ISSN: | 1126-6708 1029-8479 1029-8479 |
DOI: | 10.1088/1126-6708/2006/01/037 |