Observation Of The Cabibbo-suppressed Decay ξc+ π K- π+

Jun S.Y.; Akchurin N.; Andreev V.A.; Atamantchouk A.G.; Aykac M.; Balatz M.Y.; Bondar N.F.; Bravar A.; Cooper P.S.; 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 J.; 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.; Gulmez E.; Iori M.; Kamenski A.D.; Kangling H.; Kaya M.; Kilmer J.; Kim V.T.; Kochenda L.M.; Konigsmann K.; Konorov I.; Kozhevnikov A.A.; Krivshich A.G.; Kruger H.; Kubantsev M.A.; Kubarovsky V.P.; Kulyavtsev A.I.; Kuropatkin N.P.; Kurshetsov V.F.; Kushnirenko A.; Kwan S.; 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.; McCliment E.; McKenna S.L.; Moinester M.A.; Molchanov V.V.; Morelos A.; Mukhin V.A.; Nelson K.D.; Nemitkin A.V.; 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.I.; 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.

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Type:	Artigo de periódico
Title:	Observation Of The Cabibbo-suppressed Decay ξc+ π K- π+
Author:	Jun S.Y. Akchurin N. Andreev V.A. Atamantchouk A.G. Aykac M. Balatz M.Y. Bondar N.F. Bravar A. Cooper P.S. 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 J. 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. Gulmez E. Iori M. Kamenski A.D. Kangling H. Kaya M. Kilmer J. Kim V.T. Kochenda L.M. Konigsmann K. Konorov I. Kozhevnikov A.A. Krivshich A.G. Kruger H. Kubantsev M.A. Kubarovsky V.P. Kulyavtsev A.I. Kuropatkin N.P. Kurshetsov V.F. Kushnirenko A. Kwan S. 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. McCliment E. McKenna S.L. Moinester M.A. Molchanov V.V. Morelos A. Mukhin V.A. Nelson K.D. Nemitkin A.V. 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.I. 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.
Abstract:	We report the first observation of the Cabihbo-suppressed charm baryon decay ξc+ → 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 600 GeV/c Σ- beam. The branching fractions of the decay relative to the Cabibbo-favored ξc+ → Σ + K- π and ξ+ →c+ →- ξ+ π+ π+ are measured to he B(ξc+ → pK- π+)/B(ξc+ → Σ- π+ K π+) = 0.22 ± 0.06 ± 0.03 and B(ξc+ → ξ π+π+pK- π+)/B(ξc+ →- π+ π+) = 0.20 ± 0.04 ± 0.02, respectively.
Citation:	Physical Review Letters. , v. 84, n. 9, p. 1857 - 1861, 2000.
Rights:	aberto
Address:	http://www.scopus.com/inward/record.url?eid=2-s2.0-0004623884&partnerID=40&md5=1459e6040de07932dd1e89a2a1e68b82
Date Issue:	2000
Appears in Collections:	Unicamp - Artigos e Outros Documentos

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