Emphasizing the different trends of the existing data for the $\gamma^*\gamma \to \pi^0$ transition form factor

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

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Emphasizing the different trends of the existing data for the γ^*γ to π⁰ transition form factor

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arxiv 1212.0644 v2 pith:HTZNN2WA submitted 2012-12-04 hep-ph hep-exhep-lat

Emphasizing the different trends of the existing data for the γ^*γ to π⁰ transition form factor

A. P. Bakulev , S. V. Mikhailov , A. V. Pimikov , N. G. Stefanis This is my paper

classification hep-ph hep-exhep-lat

keywords datagammababarbellefactorformtransitionagree

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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.

Emphasizing the different trends of the existing data for the γ^*γ to π⁰ transition form factor

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