Search for D0 -> gamma gamma at BESIII [PDF]
Hajime MuramatsuBased on the ~2.9/fb data set taken at the nominal mass of psi(3770), we report our preliminary result on a search for D0 -> gamma gamma. We find no significant signal and set an upper limit on B(D0 -> gamma gamma)/B(D0 -> pi0 pi0)<5.8*10^(-3) at 90% confidence level.View original: http://arxiv.org/abs/1208.4744
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