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The pion-photon transition form factor is studied by employing two types ofSum Rules: Light Cone Sum Rules (LCSR) and Anomaly Sum Rules (ASR). Bycomparing the predictions for the pion-photon transition form factor, obtainedfrom these two approaches, the applicability limit of the LCSRs at low momentais determined. Reciprocally, the ASR threshold dependence on the momentum wasextracted using our LCSR-based method in combination with two different typesof pion distribution amplitudes and found that at higher Q2 it approaches aconstant.

Matching lightcone- and anomaly-sum-rule predictions for the pion-photon transition form factor