We perform a systematic reevaluation of the constraints on the flavor-changing neutral current parameters in R-parity conserving and R-parity violating supersymmetric models. As a typical process, we study the constraints coming from measurements on the $B^0-{\overline{B}}^0$ system of the supersymmetric ${\delta }_{13}^d$ parameters, as well as on the products of ${\lambda }^{\prime }$ type R-parity violating couplings. Present data allow us to put constraints on both the real and imaginary parts of the relevant parameters.

• Received 21 July 2003

DOI:https://doi.org/10.1103/PhysRevD.69.016004