The 43rd International Symposium on Lattice Field Theory (Lattice 2026)

First-principles determination of anomaly-induced pion decay beyond the chiral limit

28 Jul 2026, 17:10

20m

Juan Ramon Jimenez (Adele H. Stamp Student Union)

Contributed talk Hadronic and nuclear spectrum and interactions Hadronic and nuclear spectrum and interactions

Speaker

Tian Lin (Peking University)

Description

We report a lattice QCD calculation of the neutral pion decay $\pi^0\to\gamma\gamma$ beyond the chiral limit. We develop a three-point-function strategy, based on an anomalous PCAC relation, to extract the finite-quark-mass corrections to the decay amplitude, including both isospin-symmetric and isospin-breaking effects.

Presentation materials

pion_decay_TL.pdf