Next-to-next-to-leading order prediction for the photon-to-pion transition form factor

  • B. Melić, K. Passek-Kumericˇki
  • Published 2003
We evaluate the next-to-next-to-leading order corrections to the hard-scattering amplitude of the photon-topion transition form factor. Our approach is based on the predictive power of the conformal operator product expansion, which is valid for a vanishing b function in the so-called conformal scheme. The Wilson coefficients appearing in the nonforward… CONTINUE READING