منابع مشابه
Gluon Condensate from Lattice Qcd
After making some critical comments about the traditional method of extracting the gluon condensate from lattice QCD data, I present an alternative analysis. The result is more than a factor of five larger than the phenomenological value. Two closely related subjects, the effects of the infrared renormalons on the extraction and the Lepage and Mackenzie improvement on a lattice perturbation ser...
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We report on the infrared limit of the quenched lattice Landau gauge gluon and ghost propagators as well as the strong coupling constant computed from large asymmetric lattices. The infrared lattice propagators are compared with the pure power law solutions from Dyson-Schwinger equations (DSE). For the gluon propagator, the lattice data is compatible with the DSE solution. The preferred measure...
متن کاملThe IR gluon propagator from lattice QCD
The gluon propagator is computed in large asymmetric lattices, accessing momenta around 100 MeV and smaller. Our study tries to check the compatibility of the recent solutions of the gluonghost Dyson-Schwinger equations with lattice results. In particular the exponent κ , which characterizes the solutions for the infrared, is measured. Results favours a vanishing zero momentum gluon propagator....
متن کاملThe Infrared Landau Gauge Gluon Propagator from Lattice QCD
The quenched Landau gauge gluon propagator is investigated in lattice QCD with large assimetric lattices, accessing momenta as low as q ∼ 100 MeV or smaller. Our investigation focus on the IR limit of the gluon dressing function, testing the compatibility with recent solutions of the Dyson-Schwinger equations. In particular, the low energy parameters κ and α(0) are measured. The confinement of ...
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We study the flavorless gluon propagator in the Landau gauge from high statistics lattice calculations. Hypercubic artifacts are efficiently eliminated by taking the ∑ pμ → 0 limit. The propagator is fitted to the three-loops perturbative formula in an energy window ranging form ∼ 2.5 GeV up to ∼ 5.5 GeV. αs is extracted from the best fit in a continuous set of renormalisation schemes. The fits...
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ژورنال
عنوان ژورنال: Few-Body Systems
سال: 2017
ISSN: 0177-7963,1432-5411
DOI: 10.1007/s00601-017-1269-3