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

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

2002-03-14

arxiv.org/abs/hep-ph/0203136v1

Phys.Atom.Nucl. 66 (2003) 941-949; Yad.Fiz. 66 (2003) 973-982

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 8 figures

Scientific paper

10.1134/1.1577916

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 \gamma^* --> \gamma (\pi,\eta,\eta') where one of the photons, \gamma^*, has large space-like virtuality is investigated. The \gamma^* --> \gamma (\pi,\eta,\eta')$ 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.

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