Same Side Kaon Tagging Studies in Fully Reconstructed Decays

Currently the Tevatron is the only place where $B_s$ mesons are produced. The mass difference of the $B_s$ and its antiparticle is not yet known. We present here the development of a b-quark flavor tagger that largely enhances the sensitivity power of the CDF experiment to observe $B_s$ oscillations. This b-quark flavor tagging algorithm is based on the charge correlation between the signal B meson and the fragmentation tracks produced nearby. Relying on simulation events, we evaluate the performance of the same side (flavor) tagger on fully reconstructed Bu, Bd and Bs decay modes.