Search for $B_s^0\to \gamma \gamma$ and a measurement of the branching fraction for $B_s^0\to \varphi \gamma$

Belle Collaboration, D. Dutta, B. Bhuyan +148

We search for the decay $B_s^0\to \gamma \gamma$ and measure the branching fraction for $B_s^0\to \varphi \gamma$ using 121.4~${\text{fb}}^{-1}$ of data collected at the $Υ(\mathrm{…