Observation of the cabibbo-suppressed decay Ξ c→pK- π Article

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Overview

abstract

• We report the first observation of the Cabibbo-suppressed charm baryon decay Ξ c→pK- π . We observe 150±22±5 events for the signal. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600GeV/c Σ- beam. The branching fractions of the decay relative to the Cabibbo-favored Ξ c→Σ K-π and Ξ c→Ξ-π π are measured to be B(Ξ c→pK-π )/B(Ξ c→Σ K-π )=0.22±0.06±0.03 and B(Ξ c→pK-π )/B(Ξ c→Ξ-π π )=0.20±0.04±0.02, respectively. © 2000 The American Physical Society.
• We report the first observation of the Cabibbo-suppressed charm baryon decay Ξ%2bc→pK- π%2b. We observe 150±22±5 events for the signal. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600GeV/c Σ- beam. The branching fractions of the decay relative to the Cabibbo-favored Ξ%2bc→Σ%2bK-π%2b and Ξ%2bc→Ξ-π%2bπ%2b are measured to be B(Ξ%2bc→pK-π%2b)/B(Ξ%2bc→Σ%2bK-π%2b)=0.22±0.06±0.03 and B(Ξ%2bc→pK-π%2b)/B(Ξ%2bc→Ξ-π%2bπ%2b)=0.20±0.04±0.02, respectively. © 2000 The American Physical Society.

authors

• Akchurin N.
• Andreev V.A.
• Atamantchouk A.G.
• Aykac M.
• Balatz M.Y.
• Bondar N.F.
• Bravar A.
• Cooper P.
• Dauwe L.J.
• Davidenko G.V.
• Dersch U.
• Dolgolenko A.G.
• Dreossi D.
• Dzyubenko G.B.
• Edelstein R.
• Emediato L.
• Endler A.M.F.
• Engelfried Jatzkowski Jurgen
• Eschrich I.
• Escobar C.O.
• Evdokimov A.V.
• Filimonov I.S.
• Garcia F.G.
• Gaspero M.
• Gerzon S.
• Giller I.
• Golovtsov V.L.
• Goncharenko Y.M.
• Gottschalk E.
• Gouffon P.
• Grachov O.A.
• Gülmez E.
• Iori M.
• Jun S.Y.
• Kamenski A.D.
• Kangling H.
• Kaya M.
• Kilmer J.
• Kim V.T.
• Kochenda L.M.
• Konorov I.
• Kozhevnikov A.
• Krivshich A.G.
• Krüger H.
• Kubantsev M.A.
• Kubarovsky V.
• Kulyavtsev A.I.
• Kuropatkin N.P.
• Kurshetsov V.F.
• Kushnirenko A.
• Kwan S.
• Königsmann K.
• Lach J.
• Lamberto A.
• Landsberg L.G.
• Larin I.
• Leikin E.M.
• Luksys M.
• Lungov T.
• Magarrel D.
• Maleev V.P.
• Mao D.
• Masciocchi S.
• Mathew P.
• Mattson M.
• Matveev V.
• Mc Climent E.
• Mc Kenna S.L.
• Moinester M.A.
• Molchanov V.
• Morelos A.
• Mukhin V.A.
• Nelson K.D.
• Nemitkin A.
• Neoustroev P.V.
• Newsom C.
• Nilov A.P.
• Nurushev S.B.
• Ocherashvili A.
• Oleynik G.
• Onel Y.
• Ozel E.
• Ozkorucuklu S.
• Patrichev S.
• Penzo A.
• Petrenko S.I.
• Pogodin P.
• Povh B.
• Procario M.
• Prutskoi V.A.
• Ramberg E.
• Rappazzo G.F.
• Razmyslovich B.V.
• Rud V.
• Russ J.
• Schiavon P.
• Semyatchkin V.K.
• Simon J.
• Sitnikov A.I.
• Skow D.
• Smith V.J.
• Srivastava M.
• Steiner V.
• Stepanov V.
• Stutte L.
• Svoiski M.
• Terentyev N.K.
• Thomas G.P.
• Uvarov L.N.
• Vasiliev A.N.
• Vavilov D.V.
• Verebryusov V.S.
• Victorov V.A.
• Vishnyakov V.E.
• Vorobyov A.A.
• Vorwalter K.
• Wenheng Z.
• You J.
• Yunshan L.
• Zhenlin M.
• Zhigang L.
• Zukanovich Funchal R.

publication date

• 2000-01-01

funding provided via

• National Science Foundation, NSF: 9602178  Grant

published in

• Physical Review Letters  Journal

Identity

Digital Object Identifier (DOI)

• 10.1103/PhysRevLett.84.1857

Additional Document Info

start page

• 1857

end page

• 1861

volume

• 84

issue

• 9