Penguin Effects in $B_d^0\to J/\psi K_S^0$ and $B_s^0\to J/\psi \varphi$

Marten Z. Barel, Kristof De Bruyn, Robert Fleischer +1

Controlling the contributions from doubly Cabibbo-suppressed penguin topologies in the decays $B_d^0\to J/\psi K_S^0$ and $B_s^0\to J/\psi \varphi$ is mandatory to reach the highest possible pre…