η and η′ mesons and dimension 2 gluon condensate 〈A2〉

Scientific paper - Original scientific paper

• Author: Dalibor Kekez
• Author: Dubravko Klabučar
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

The study of light pseudoscalar quark-antiquark bound states in the Dyson-Schwinger approach with the effective QCD coupling enhanced by the interplay of the dimension 2 gluon condensate and dimension 4 gluon condensate , is extended to the eta– eta[prime] complex. We include the effects of the gluon axial anomaly into the Dyson-Schwinger approach to mesons. The calculated masses, mixing and two-photon decay widths of eta and eta[prime] mesons are in agreement with experiment. Also, in a model-independent way, we give the modification of the Gell-Mann– Okubo and Schwinger nonet relations due to the interplay of the gluon anomaly and SU(3) flavor symmetry breaking.

• Keywords (english): eta mesons
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review D - Particles, Fields, Gravitation and Cosmology
• Numbering: vol. 73, no. 3, 036002
• p-ISSN: 1550-7998
• e-ISSN: 1550-2368
• DOI: https://doi.org/10.1103/PhysRevD.73.036002
• URN:NBN: urn:nbn:hr:217:764004
• Publication: 2006
• Document URL: http://link.aps.org/doi/10.1103/PhysRevD.73.036002
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2006) by the American Physical Society.
• Created on: 2019-10-15 17:50:36