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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:In this communication we discuss few topics related with modern experimental data on the physics of light pseudoscalar mesons. It includes the contribution of the pseudoscalar mesons to the muon anomalous magnetic moment (AMM), the rare decays of light pseudoscalar mesons to lepton pair, g–2, the transition form factors of pseudoscalar mesons at large momentum transfer, the pion transversity form factor.
Measuring the muon anomalous magnetic moment g–2 and the rare decays of light pseudoscalar mesons into lepton pair P→l+l−P→l+l− serve as important test of the standard model. To reduce the theoretical uncertainty in the standard model predictions the data on the transition form factors of light pseudoscalar mesons play significant role. Recently new data on behavior of these form factors at large momentum transfer was supplied by the BABAR collaboration.