The gauge invariant quark correlator in QCD sum rules and lattice QCD
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Publication:699997
zbMATH Open1003.81029arXivhep-ph/0004040MaRDI QIDQ699997
Enrico Meggiolaro, Markus Eidemüller, Matthias Jamin, Hans Günter Dosch
Publication date: 26 September 2002
Published in: Journal of High Energy Physics (Search for Journal in Brave)
Abstract: Taking the gauge invariant quark correlator as an example, in this work we perform a direct comparison of lattice QCD simulations with the QCD sum rule approach. The quark correlator is first investigated in the framework of QCD sum rules and the correlation length of the quark field is calculated. Comparing the phenomenological part of the sum rule with previous measurements of the quark correlator on the lattice, we are able to obtain an independent result for the correlation length. From a fit of the lattice data to the operator product expansion, the quark condensate and the mixed quark-gluon condensate can be extracted.
Full work available at URL: https://arxiv.org/abs/hep-ph/0004040
Strong interaction, including quantum chromodynamics (81V05) Nonperturbative methods of renormalization applied to problems in quantum field theory (81T16)
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