Transition form factors and light-cone distribution amplitudes of pseudoscalar mesons in the chiral quark model

Abstract

It is shown that a chiral quark model of the Nambu--Jona-Lasinio type can be used to describe "soft"-momenta parts of the amplitudes with large momentum transfer. As a sample, the processes γ^* --> γ(π,η,η') where one of the photons, γ^*, has large space-like virtuality is investigated. The γ^* --> γ(π,η,η')$ transition form factors are calculated for a wide region of transferred momenta. The results are consistent with the calculations performed in the instanton-induced chiral quark model and agree with experimental data. The distribution amplitudes of pseudoscalar mesons are derived.

24 pages, 8 figures

References in corpus (2)

• On high $Q^2$ behavior of the pion form factor for transitions ${\gamma }^{\ast }\gamma \to {\pi }^0$ and ${\gamma }^{\ast }{\gamma }^{\ast }\to {\pi }^0$ within the nonlocal quark-pion model
• Ground and excited scalar isoscalar meson states in a U(3)xU(3) quark model with a glueball

Cited by in corpus (4)

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• Covariant Non-local Chiral Quark Model and Pion-photon Transition Distribution Amplitudes