A Bethe-Salpeter-equation study with the <A^2> - enhanced effective QCD coupling

Kekez, Dalibor and Klabučar, Dubravko (2004) A Bethe-Salpeter-equation study with the <A^2> - enhanced effective QCD coupling . Fizika B, 13 (2). pp. 461-476. ISSN 1330-0016

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Abstract

Dyson-Schwinger equations provide an effective approach to physics of strong interactions. To reproduce the hadronic phenomenology well, the Dyson-Schwinger approach in the rainbow-ladder approximation must employ an effective interaction between quarks which is fairly strong at intermediate (Q2 ~ 0.5 GeV^2) spacelike transferred momenta. We have recently proposed that such an interaction may originate from the dimension-2 gluon condensate <A^2> which has recently attracted much attention. We showed that the resulting effective running coupling leads to the sufficiently strong dynamical chiral symmetry breaking and successful phenomenology, at least in the light sector of pseudoscalar mesons. In the present paper, we give a more detailed investigation of the parameter dependence of these results.

Item Type: Article
Keywords: dimension-2 gluon condensate, QCD, Dyson-Schwinger equation, hadronic physics, pseudoscalar mesons
Date: 2004
Subjects: NATURAL SCIENCES > Physics
Divisions: Faculty of Science > Department of Physics
Publisher: Hrvatsko fizikalno društvo
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 14 Mar 2014 21:56
Last Modified: 21 Mar 2014 11:53
URI: http://digre.pmf.unizg.hr/id/eprint/612

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