Prefer a chat interface with context about you and your work?
Search for the rare decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>D</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:mi>γ</mml:mi><mml:mi>γ</mml:mi></mml:math>at Belle
We search for the rare radiative decay D0→γγ using a data sample with an integrated luminosity of 832 fb−1 recorded 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 …