Pseudoscalar qqbar mesons and effective QCD coupling enhanced by (A2) condensate (CROSBI ID 113296)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Kekez, Dalibor ; Klabučar, Dubravko
engleski
Pseudoscalar qqbar mesons and effective QCD coupling enhanced by (A2) condensate
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.
pseudoscalar mesons; QCD coupling
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o izdanju
71 (1)
2005.
014004-1-014004--x
objavljeno
1550-7998