Neutral pion form factor measurement at NA62


The NA62 experiment at CERN collected a large sample of charged kaon decays with a highly efficient trigger for decays into electrons in 2007. The kaon beam represents a source of tagged neutral pion decays in vacuum. A measurement of the electromagnetic transition form factor slope of the neutral pion in the time-like region from 1.05Γ—1061.05\times10^6 fully reconstructed Ο€0\pi^0 Dalitz decay is presented. The limits on dark photon production in Ο€0\pi^0 decays from the earlier kaon experiment at CERN, NA48/2, are also reported.Comment: Talk given at ICHEP 2016, Chicago, 3-10 August 2016. arXiv admin note: text overlap with arXiv:1609.0295

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