Muon g-2, rare decays P \to l^+l^- and transition form factors P \to γγ^*

Details Muon g-2, rare decays P \to l^+l^- and transition form factors P \to γγ^* Muon g-2, rare decays P \to l^+l^- and transition form factors P \to γγ^*

2009-09-28

arxiv.org/abs/0909.5111v2

Nucl.Phys.Proc.Suppl.198:190-193,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures, invited talk at the 3rd Joint International Hadron Structure'09 Conference, Tatranska Strba (Slovak Republ

Scientific paper

10.1016/j.nuclphysbps.2009.12.03

Measuring the muon anomalous magnetic moment g-2 and the rare decays of light pseudoscalar mesons into lepton pair P \to 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. We comment on the (in)consistency of these data with perturbative QCD expectation.

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