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On the pion distribution amplitude. Derivation, properties, predictions
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abstract
We provide an in-depth analysis of the $\pi$ distribution amplitude in terms of two different Gegenbauer representations. Detailed predictions for the $\pi-\gamma$ transition form factor are presented, obtained with light-cone sum rules. Various $\pi$ distribution amplitudes are tested and the crucial role of their endpoint behavior in the form-factor analysis is discussed. Comparison with the data is given.
Forward citations
Cited by 2 Pith papers
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The ${\gamma^* \gamma^* \to \eta_c (1S,2S)}$ transition form factors for spacelike photons
The double-virtual gamma*gamma* to eta_c transition form factor is computed from light-front wave functions and is predicted to violate factorization strongly while depending only weakly on the asymmetry of the two ph...
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Data-driven analysis of the $\gamma\gamma^*\rightarrow\pi^0$ system using mathematical models and the role of feedback-loop dynamics
A two-parameter fit model yields a half-saturation relation that is algebraically trivial, and a claimed improved Belle fit that is not quantitatively demonstrated.
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