Bd–Bd mixing and the Bd→J/ψKs asymmetry in general SUSY models Original Research Article

We present a next-to-leading order determination of the gluino-mediated SUSY contributions to Bd–Bd mixing and to the CP asymmetry aJ/ψKs in the framework of the mass-insertion approximation. Using hadronic matrix elements recently computed on the lattice, we obtain improved constraints on the squark-mass splittings.