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Light-by-light contribution to the (g-2)(mu) of muon from pseudoscalar channel in the nonlocal S U(3) x S U(3) quark model

Авторы: Dorokhov A.E., Radzhabov A.E., Zhevlakov A.S.

Журнал: Nuclear Physics B-Proceedings Supplements

Том: 219

Номер:

Год: 2011

Отчётный год: 2011

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Аннотация: The light-by-light contribution from the lightest neutral pseudoscalar mesons to the anomalous magnetic moment of muon is calculated in the framework nonlocal S U(3) x S U(3) quark model. The model is based on four-quark interaction of the Nambu-Jona-Lasinio type and t'Hooft six-quark interaction. Full kinematic dependencies of vertices with off-shell mesons in the light-by-light scattering amplitude is taken into account. As a result of that dependence the pseudoscalar contribution a(mu)(PS,LbL) = (5.85 +/- 0.87).10(-10) is smaller then most of previous estimates. The comparison with the results of other models is performed.

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