Search for Supersymmetry using rare B$0\atop{s(d)}$ → μ⁺μ^- decays at CDF Run II

Abstract

Co-Chairs of Advisory Committee: Teruki Kamon David Toback A search for rare B 0 s → µ + µ − and B 0 d → µ + µ − decays has been performed in pp collisions at √ s = 1.96 TeV using 364 pb −1 of data collected by the CDF II experiment at the Fermilab Tevatron Collider. The rate of each decay is sensitive to contributions from physics beyond the Standard Model (SM). No events pass the optimized selection requirements, consistent with the SM expectation. The resulting upper limits on the branching ratios are B(B 0 s → µ + µ −) < 1.5 × 10 −7 and B(B 0 d → µ + µ −) < 3.8 × 10 −8 at the 90% confidence level. The limits are used to exclude some parameter space for several supersymmetric models.