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1. chinaXiv:201609.00813 [pdf]

Search for the rare decay $D^0\to\gamma\gamma$ at Belle

Nisar, N. K. and others
Subjects: Physics >> Nuclear Physics

We search for the rare radiative decay?D0→γγ?using a data sample with an integrated luminosity of?832fb?1recorded by the Belle detector at the KEKB?e+e??asymmetric-energy collider. We find no statistically significant signal and set an upper limit on the branching fraction of?B(D0→γγ)<8.5×10?7?at?90%?confidence level. This is the most restrictive limit on the decay channel to date.

submitted time 2016-09-12 Hits971Downloads546 Comment 0

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