On supersymmetric contributions to the CP asymmetry of the B→φKS process -: art. no. 055009

We analyze the CP asymmetry of the B-->phiK(S) process in general supersymmetric models. In the framework of the mass insertion approximation, we derive model independent limits for the mixing CP asymmetry. We show that a chromomagnetic type of operator may play an important role in accounting for the deviation of the mixing CP asymmetry between B-->phiK(S) and B-->J/psiK(S) processes observed by the Belle and BaBar experiments. A possible correlation between the direct and mixing CP asymmetry is also discussed. Finally, we apply our result in the minimal supergravity model and supersymmetric models with nonuniversal soft terms.