We present a search for the flavor-changing neutral current decays Bd0→μ+μ− and Bs0→μ+μ− in pp¯ collisions at s=1.8 TeV, using 98pb−1 of data collected at the Collider Detector at Fermilab. We find one candidate event for these decays, which is consistent with the background estimates, and set upper limits on the branching fractions of B(Bd0→μ+μ−)<8.6×10−7 and B(Bs0→μ+μ−)<2.6×10−6 at 95% confidence level.
C. E. Pagliarone
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