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hep-lat2026
First-Principles Determination of the QCD Contribution to the Axion-Photon Coupling Using Domain-Wall Fermions
Tian Lin, Hao-Yang Cheng, Xu Feng +3
The axion-photon coupling, crucial for experimental axion searches and tests of the strong CP solution, receives a substantial model-independent contribution …
hep-lat2026
First-principles determination of anomaly-induced pion decay beyond the chiral limit
Tian Lin, Xu Feng, Lu-Chang Jin +2
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 deter…
hep-lat2024
Lattice QCD calculation of the -pole contribution to the hadronic light-by-light scattering in the anomalous magnetic moment of the muon
Tian Lin, Mattia Bruno, Xu Feng +4
We develop a method to compute the pion transition form factor directly at arbitrary space-like photon momenta and use it to determine the -pole contribution to the hadronic l…