Pion distribution amplitudes within the instanton model of QCD vacuum

Details Pion distribution amplitudes within the instanton model of QCD vacuum Pion distribution amplitudes within the instanton model of QCD vacuum

2002-12-11

arxiv.org/abs/hep-ph/0212156v2

JETP Lett. 77 (2003) 63-67; Pisma Zh.Eksp.Teor.Fiz. 77 (2003) 68-72

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 4 eps figures. Revised version: references and figures added

Scientific paper

10.1134/1.1564221

Pion transition form factor for the process $\gamma*\gamma*\to \pi^0$ at space-like values of photon momenta is calculated within the effective quark-meson model with the interaction induced by instanton exchange. The leading and next-to-leading order power asymptotics of the form factor and the relation between the light-cone pion distribution amplitudes of twists 2 and 4 and the dynamically generated quark mass are found.

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