21 research outputs found

    Search for Rare and Forbidden 3-body Di-muon Decays of the Charmed Mesons D+ and Ds+

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    Using a high statistics sample of photo-produced charm particles from the FOCUS experiment at Fermilab, we report results of a search for eight rare and Standard-Model-forbidden decays: D+, Ds+ > h+/- muon-/+ muon+ (with h=pion or Kaon). Improvement over previous results by a factor of 1.7--14 is realized. Our branching ratio upper limit D+ > pion+ muon- muon+ of 8.8E-6 at the 90% C.L. is below the current MSSM R-Parity violating constraint.Comment: 17 pages, 7 figure file

    Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

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