Time-Dependent {\boldmath $CP$}-Violating Asymmetry in $B^0\to {\rho }^0\gamma$ Decays

Y. Ushiroda

We report the first measurement of CP-violation parameters in $B^0\to {\rho }^0\gamma$ decays based on a data sample of $657\times 10^{6}B\bar{B}$ pairs collected with the Belle detector at the…