Transition form-factors and light cone distribution amplitudes of pseudoscalar mesons in the chiral quark modelстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация: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.