Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 72, Issue 11, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-012-2227-3
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Funding
- Heisenberg-Landau program (JINR)
- Russian Foundation for Basic Research [10-02-00368, 11-02-00112]
- Federal Target Program Research and Training Specialists in Innovative Russia [16.740.11.0154, 14.B37.21.0910]
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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 of the nonlocal SU(3) x SU(3) quark model. The model is based on chirally symmetric four-quark interaction of the Nambu-Jona-Lasinio type and Kobayashi-Maskawa-'t Hooft U-A(1) breaking six-quark interaction. Full kinematic dependence of vertices with off-shell mesons and photons in intermediate states in the light-by-light scattering amplitude is taken into account. The small positive contributions from the scalar mesons stabilize the total result with respect to change of model parameters and reduces to alpha(LbL,PS+S)(mu) = (6.25 +/- 0.83).10(-10).
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