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On the eta-eta' complex in the SD-BS approach

Dubravko Klabucar·Dalibor Kekez·Michael D. Scadron
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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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Dubravko Klabucar, Dalibor Kekez, Michael D. Scadron. 2000-12-20. On the eta-eta' complex in the SD-BS approach. https://arxiv.org/abs/hep-ph/0012267

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