Electromagnetic transition form factor and radiative corrections in decays of neutral pions

Abstract

Abstract. We briefly summarize experimental and theoretical results on the rare decay π 0 → e + e − . The notorious 3.3 σ discrepancy between the SM prediction and the experimental value provided by KTeV collaboration is discussed in the view of a complete set of NLO QED radiative corrections. We also present the Two-Hadron Saturation (THS) scenario for the PVV correlator and apply it to the decay under discussion. The discrepancy then reduces down to 1.8 σ.