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- W1727993913 abstract "We perform a lattice QCD calculation of the pi^0togammagamma transition form factor and the associated decay width. We use a Euclidean time integral of the relevant three-point function to compute the decay amplitude for two-photon final state, which is a non-QCD state. We use the all-to-all quark propagator technique to carry out this integral as well as to include the disconnected quark diagram contributions. We execute the calculation using the overlap fermion formulation, which ensures the exact chiral symmetry on the lattice and produces the chiral anomaly through the Jacobian of the chiral transformation. We examine various sources of systematic effects except for possible discretization effect. Our final results for the form factor and the decay width reproduce the ABJ anomaly in the chiral limit and agree with the experimental measurements at the physical pion mass with a precision of a few percent." @default.
- W1727993913 created "2016-06-24" @default.
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- W1727993913 date "2012-11-12" @default.
- W1727993913 modified "2023-09-27" @default.
- W1727993913 title "The neutral pion decay and the chiral anomaly on the lattice" @default.
- W1727993913 hasPublicationYear "2012" @default.
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