Pions reloaded

We present a novel version of the pion Bethe-Salpeter equation in the chiral limit, solved using as ingredients state-of-the-art QCD correlation functions. The constraints imposed by the axial Ward-Takahashi identities are exactly fulfilled, both formally and numerically.

💡 Research Summary

In “Pions Reloaded” the authors present a novel formulation of the pion Bethe‑Salpeter equation (BSE) in the chiral limit, built upon state‑of‑the‑art QCD correlation functions obtained from functional methods and lattice simulations. The central theoretical challenge is to preserve the axial Ward‑Takahashi identity (WTI)
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