Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-03-10
Eur.Phys.J.C71:1702,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 7 figures; version for journal, minor corrections are made
Scientific paper
10.1140/epjc/s10052-011-1702-6
The light-by-light contribution to the anomalous magnetic moment of muon (g-2)_{\mu} from the hadronic exchanges in the neutral pseudoscalar meson channel is calculated in the nonlocal chiral quark model. The full kinematic dependence of the meson-two-photon vertices on the virtualities of the mesons and photons is taken into account. The status of various phenomenological and QCD short-distance constraints is discussed and the comparison with the predictions of other models is performed. It is demonstrated that the effect of the full kinematic dependence in the meson-photon vertices is to reduce the contribution of pseudoscalar exchages to a_\mu ^{PS,LbL} by approximately factor 1.5 in comparison with the most of previous estimates.
Dorokhov Alexander E.
Radzhabov A. E.
Zhevlakov A. S.
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