Decays of eta and eta[prime] Probing symmetries and symmetry violations in QCD

Decays of the eta and eta[prime] are suited to study symmetries and symmetry violations in QCD, e.g., the chiral anomalies and the axial U(1) anomaly in strong interactions, as well as isospin breaking due to the quark mass difference mu-md. We present a theoretical framework which is suited to desc...

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Bibliographic Details
Main Authors: Borasoy, B, Nissler, R
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:Decays of the eta and eta[prime] are suited to study symmetries and symmetry violations in QCD, e.g., the chiral anomalies and the axial U(1) anomaly in strong interactions, as well as isospin breaking due to the quark mass difference mu-md. We present a theoretical framework which is suited to describe eta,eta[prime] decays in a consistent and uniform manner. It is based on the combination of the chiral effective Lagrangian with a coupled-channels Bethe-Salpeter equation which satisfies unitarity constraints. Very good agreement with experimental data is achieved.
ISSN:0094-243X
DOI:10.1063/1.2819030