On the eta-eta' complex in the SD-BS approach
Dubravko Klabucar, Dalibor Kekez, Michael D. Scadron
Abstract
The bound-state Schwinger-Dyson and Bethe-Salpeter (SD-BS) approach is chirally well-behaved and provides a reliable treatment of the eta-eta' complex although a ladder approximation is employed. Allowing for the effects of the SU(3) flavor symmetry breaking in the quark-antiquark annihilation, leads to the improved eta-eta' mass matrix.
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