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e+e− results from BaBar and their impact on the muon g−2 prediction

Abstract : The BaBar collaboration has nearly completed a program of precise measurements of the cross sections for the dominant channels of image from threshold to 3 GeV using the initial-state radiation (ISR) method, i.e. the measurement of the cross sections image with the energetic γ detected at large angle to the beams. These data are used as input to vacuum polarization dispersion integrals, in particular the hadronic contribution to the muon image anomaly. In addition to the recently measured image and image cross sections, giving the dominant contribution, multihadronic channels have been investigated, with some recent examples presented here for the image, image, image, image, image channels. The BaBar results have the best precision and cover for the first time almost all significant hadronic contributions below 2 GeV entering the muon image prediction.
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Submitted on : Wednesday, September 17, 2014 - 3:55:29 PM
Last modification on : Saturday, October 3, 2020 - 3:54:49 AM





M. Davier. e+e− results from BaBar and their impact on the muon g−2 prediction. Tau2014 - 13th International Workshop on Tau Lepton Physics, Sep 2014, Aachen, Germany. pp.102-106, ⟨10.1016/j.nuclphysbps.2015.02.021⟩. ⟨in2p3-01064987⟩



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