The light-by-light contribution to the (g−2) of muon from lightest pseudoscalar and scalar mesons within nonlocal chiral quark model.

The light-by-light contribution from the lightest neutral pseudoscalar and scalar mesons to the anomalous magnetic moment of muon is calculated in the framework nonlocal SU(3)×SU(3) quark model. The model is based on a four-quark interaction of the Nambu–Jona-Lasinio type and tʼHooft six-quark interaction. Full kinematic dependencies of vertices with off-shell mesons in the light-by-light scattering amplitude is taken into account.