Axial-vector form factor for pion radiative decay is evaluated with a constant non-perturbative self-energy term in the pseudovector interaction, using a parameter tuned to match data.
Kinpara, arXiv:hep-ph/2506.02502
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The Non-perturbative term for the Axial-vector Form Factor of Pion Decay
Axial-vector form factor for pion radiative decay is evaluated with a constant non-perturbative self-energy term in the pseudovector interaction, using a parameter tuned to match data.