Electromagnetic form-factor of the $\pi$ meson with light-cone QCD sum rules

Abstract

In this article, we calculate the electromagnetic form-factor of the $\pi$ meson with the light-cone QCD sum rules. The numerical value $F_{\pi }^p(0)=0.999\pm 0.001$ is in excellent agreement with the experimental data (extrapolated to the limit of zero momentum transfer, or the normalization condition $F_{\pi }(0)=1$). For large momentum transfers, the values from the two sum rules are all comparable with the experimental data and theoretical estimations.

16 pages, 3 figures, 5 version

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