Transition form factors and light-cone distribution amplitudes of pseudoscalar mesons in the chiral quark model |
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Authors: | A E Dorokhov M K Volkov V L Yudichev |
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Institution: | (1) Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia |
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Abstract: | It is shown that a chiral quark model of the Nambu-Jona-Lasinio type can be used to describe “soft”-momentum 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 spacelike virtuality, are investigated. The γ* → γ(π, η, η′) transition form factors are calculated for a wide region of the momentum transfer. 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. |
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