Pion distribution amplitude from holographic QCD and the electromagnetic form factor F_pi(Q2)

Abstract

The holographic QCD prediction for the pion distribution amplitude (DA) ${\varphi }_{hol}(u)$ is used to compute the pion spacelike electromagnetic form factor $F_{\pi }(Q^2)$ within the QCD light-cone sum rule method. In calculations the pion's renormalon-based model twist-4 DA, as well as the asymptotic twist-4 DA are employed. Obtained theoretical predictions are compared with experimental data and with results of the holographic QCD.

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• Light Cone Sum Rules for the pi0-gamma*-gamma Form Factor Revisited
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• Pion transition form factor in k_T factorization
• QCD sum rules with nonlocal condensates and the spacelike pion form factor
• Endpoint behavior of the pion distribution amplitude in QCD sum rules with nonlocal condensates
• Instanton effects on the twist-three light-cone distribution amplitudes of pion and light scalar mesons above 1GeV
• Pion Form Factor in QCD: How to Calculate?