η and η′ mesons and dimension 2 gluon condensate (A2) -: art. no. 036002

被引：20
|
作者：
Kekez, D
Klabucar, D
机构：
[1] Rudjer Boskovic Inst, Zagreb 10002, Croatia
[2] Univ Zagreb, Fac Sci, Dept Phys, Zagreb 10000, Croatia
来源：
PHYSICAL REVIEW D | 2006年 / 73卷 / 03期
关键词：
D O I：
10.1103/PhysRevD.73.036002
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 < A(2)> and dimension 4 gluon condensate < F-2>, is extended to the eta-eta' 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' 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.
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页数：12
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