1212.0644 (A. P. Bakulev et al.)

Emphasizing the different trends of the existing data for the
$γ^*γ\to π^0$ transition form factor    [PDF]

A. P. Bakulev, S. V. Mikhailov, A. V. Pimikov, N. G. Stefanis

The new data on the $\gamma^*\gamma \to \pi^0$ transition form factor of the Belle Collaboration are analyzed in comparison with those of BaBar (including the older data of CELLO and CLEO) using an approach based on light-cone sum rules. Performing a 2-, and a 3-parametric fit to these data, we found that the Belle and the BaBar data have no overlap at the $1\sigma$ level. While the Belle data agree with our predictions, the Babar data are in conflict with them.

View original: http://arxiv.org/abs/1212.0644