Pseudoscalar qqbar mesons and effective QCD coupling enhanced by (A2) condensate

Kekez, Dalibor and Klabučar, Dubravko (2005) Pseudoscalar qqbar mesons and effective QCD coupling enhanced by (A2) condensate. Physical Review D, 71 (1). pp. 14004-8. ISSN 1550-7998

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Abstract

Recent developments provided evidence that the dimension 2 gluon condensate hA2i is important for the nonperturbative regime of Yang-Mills theories (quantized in the Landau gauge). We show that it may be relevant for the Dyson-Schwinger approach to QCD. In order that this approach leads to a successful hadronic phenomenology, an enhancement of the effective quark-gluon interaction seems to be needed at intermediate (p2- 0:5 GeV2) momenta. It is shown that the gluon condensate hA2i provides such an enhancement. It is also shown that the resulting effective strong running coupling leads to the sufficiently strong dynamical chiral symmetry breaking and successful phenomenology at least in the light sector of pseudoscalar mesons.

Item Type: Article
Keywords: pseudoscalar mesons, QCD coupling
Date: January 2005
Subjects: NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields
Additional Information: Copyright (2005) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 0119261, 0098011
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 24 May 2014 19:31
Last Modified: 24 May 2014 19:31
URI: http://digre.pmf.unizg.hr/id/eprint/1698

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