$B_s^0\to K^0\overline{K}{}^0$ beyond the Standard Model

Yuval Grossman, Yosef Nir, Matthias Neubert +2

Within the Standard Model, the branching fraction of the rare decay $B_s\to K^0{\bar{K}}^0$ is related to other decay rates and CP asymmetries through the approximate $SU(3)$ flavor s…