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- W2207202332 abstract "Using 2.92 fb−1 of electron-positron annihilation data collected at s=3.773 GeV with the BESIII detector, we report the results of a search for the flavor-changing neutral current process D0→γγ using a double-tag technique. We find no signal and set an upper limit at 90% confidence level for the branching fraction of B(D0→γγ)<3.8×10−6. We also investigate D0-meson decay into two neutral pions, obtaining a branching fraction of B(D0→π0π0)=(8.24±0.21(stat)±0.30(syst))×10−4, the most precise measurement to date and consistent with the current world average.Received 12 May 2015DOI:https://doi.org/10.1103/PhysRevD.91.112015© 2015 American Physical Society" @default.
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