Light-Meson Two-Photon Decays in Full QCD

Details Light-Meson Two-Photon Decays in Full QCD Light-Meson Two-Photon Decays in Full QCD

2008-10-30

arxiv.org/abs/0810.5550v1

PoS LATTICE2008:159,2008

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 4 figures. Talk given at the XXVI International Symposium on Lattice Field Theory (LATTICE 2008), July 14-19, 2008, W

Scientific paper

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.

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