出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present a study of two-photon decays of light mesons, focusing on the neutral pion decay. This
important process highlights the effects of the axial anomaly in QCD but has been little studied
on the lattice. By applying the Lehmann-Symanzik-Zimmermann (LSZ) reduction formula, we
reconstruct the electromagnetic matrix elements from three-point vector-vector Green functions
calculated on 2+1-flavor isotropic clover lattices.
