Author

Lu-Chang Jin

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Preprint Aug 2026

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

The two-photon decay of the neutral pion is fixed in the chiral limit by the Adler-Bell-Jackiw anomaly, while nonzero quark masses induce few-percent corrections that must be determined for precision tests of QCD beyond the chiral limit. Using the anomalous PCAC relation, we compute them in lattice QCD as deviations fr...

Tian Lin, Xu Feng, Lu-Chang Jin et al. · 0 citations

Preprint Sep 2026

First-Principles Determination of the QCD Contribution to the Axion-Photon Coupling Using Domain-Wall Fermions

The axion-photon coupling, crucial for experimental axion searches and tests of the strong CP solution, receives a substantial model-independent contribution $\mathcal C_{\rm QCD}$ from QCD dynamics. Next-to-leading-order chiral perturbation theory (NLO ChPT) in different frameworks has yielded puzzling discrepancies o...

Tian Lin, Hao-Yang Cheng, Xu Feng et al. · 0 citations