Speaker
Yaroslav Klopot
(BLTP JINR)
Description
Manifestations of electromagnetic and strong anomalies axial anomalies in the radiative decays of $\eta$ and $\eta'$ mesons are studied. Applying a dispersive approach, we derive the anomaly sum rule for a singlet axial current, where the strong anomaly exists. A low energy theorem is generalized for the case of mixing states and is applied to evaluate a subtraction part of the strong anomaly. We found a relatively small contribution of the strong anomaly to the two-photon decay amplitudes of $\eta$ and $\eta'$ mesons.
Primary author
Yaroslav Klopot
(BLTP JINR)
