B Fragmentation and Same Side Kaon Tagger

Using $p\bar p$ collision data at $\sqrt{s} = 1.96$~TeV collected with the CDF\,II experiment at the Fermilab we study fragmentation of $b$ quarks. We measure multiplicities and relative fractions of K, pi, p particles in the vicinity of partially reconstructed semileptonic decays of B0, B+ and Bs. We then apply this knowledge and Monte Carlo techniques to develop B flavor tagging method based on kaons identified near the signal B candidates using the Time-of-Flight and dE/dX measurements of charged tracks. The effective tagging efficiency of the SSKT is predicted for Bs events. The application and impact of SSKT on Bs mixing measirement is discussed.