Annihilation Contributions and CP Asymmetries in $B^{+}\to {\pi }^{+}{K}^0,K^{+}{K}^0$ and $B^0\to K^0{\bar{K}}^0$

Xi-Qing Hao, Xiao-Gang He, Xue-Qian Li

Recently the branching ratios for $B^{+}\to K^{+}{\bar{K}}^0$ and $B^0\to K^0{\bar{K}}^0$ have been measured. Data indicate that the annihilation amplitudes in these decays are not zero. A…