| Abstract: | We report the measurement of the branching fraction of the $B^0 o K_S^0
pi^0 gamma$ decay in $e^+ e^- o Upsilon(4S) o B overline{B}$ data
recorded by the Belle II experiment at the SuperKEKB asymmetric-energy collider
and corresponding to 190 fb$^{-1}$ of integrated luminosity. The signal yield
is measured to be $121pm 29,hbox{(stat.)}$, leading to the branching
fraction ${cal B}left(B^0 o K_S^0 pi^0 gamma
ight) = left(7.3 pm
1.8,hbox{(stat.)} pm 1.0,hbox{(syst.)}
ight) imes 10^{-6}$, which
agrees with the known value. |
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