Rubin-LSST

Abstract:

We report on a search for the flavor-changing neutral current decays B0d, s→μ+μ−, B+→μ+μ−K+, and B0→μ+μ−K*0 using data from pp- collisions at s = 1.8 TeV, collected with the Collider Detector at Fermilab during the 1992-1993 running period. We find no indication of such decays, and we set the following 90% confidence level upper limits on branching ratios: B\(B0→μ+μ−\)<1.6×10−6, B(B0s→μ+μ−\)<8.4×10−6, B\(B+→μ+μ−K+\)<1.0×10−5, and B\(B0→μ+μ−K*0\)<2.5×10−5. © 1996 The American Physical Society.

Abstract:

We present the result of a search for charged Higgs boson decays of the top quark, produced in p-p collisions at √s=1.8 TeV. When the charged Higgs boson is heavy and decays to a τ lepton, which subsequently decays hadronically, the resulting events have a unique signature: large missing transverse energy and the low-charged-multiplicity τ. Data collected in 1992 and 1993 at the Collider Detector at Fermilab, corresponding to 18.7±0.7 pb^-1, exclude new regions of combined top quark and charged Higgs boson mass, in extensions to the standard model with two Higgs doublets. © 1996 The American Physical Society.