Searching for new physics in b → ss ¯ d decays
For any new physics possibly emerging in the future B experiments, the problem is how to extract the signals from the SM background. We consider the decay b → ss ¯ d which is very small in the SM. In the MSSM this decay is possibly accessible in the future experiments. In the supersymmetric models with R-parity violating couplings, this channel is not strictly constrained, thus being useful in obtaining bounds on the lepton-number violating couplings. A typical candidate for the suggested search is the B − → K − K − � + mode.