A test of the instanton vacuum with low-energy theorems of the axial anomaly
M. M. Musakhanov, Hyun-Chul Kim
Abstract
We revisit the QCD+QED axial anomaly low-energy theorems which give an exact relation between the matrix elements of the gluon and photon parts of the axial anomaly operator equation within the framework of the effective action derived from the instanton vacuum. The matrix elements between the vacuum and two photon states and between the vacuum and two gluon states are investigated for arbitrary Nf in the chiral limit. Having gauged the effective action properly, we show that the model does exactly satisfy the low-energy theorems.
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