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05 July 2020
 
  » pubmed » pmid12225136

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First observation of the doubly charmed baryon Xi(+)(cc)
M Mattson ; G Alkhazov ; A G Atamantchouk ; M Y Balatz ; N F Bondar ; P S Cooper ; L J Dauwe ; G V Davidenko ; U Dersch ; A G Dolgolenko ; G B Dzyubenko ; R Edelstein ; L Emediato ; A M F Endler ; J Engelfried ; I Eschrich ; C O Escobar ; A V Evdokimov ; I S Filimonov ; F G Garcia ; M Gaspero ; I Giller ; V L Golovtsov ; P Gouffon ; E Gülmez ; He Kangling ; M Iori ; S Y Jun ; M Kaya ; J Kilmer ; V T Kim ; L M Kochenda ; I Konorov ; A P Kozhevnikov ; A G Krivshich ; H Krüger ; M A Kubantsev ; V P Kubarovsky ; A I Kulyavtsev ; N P Kuropatkin ; V F Kurshetsov ; A Kushnirenko ; S Kwan ; J Lach ; A Lamberto ; L G Landsberg ; I Larin ; E M Leikin ; Li Yunshan ; M Luksys ; T Lungov ; V P Maleev ; D Mao ; Mao Chensheng ; Mao Zhenlin ; P Mathew ; V Matveev ; E McCliment ; M A Moinester ; V V Molchanov ; A Morelos ; K D Nelson ; A V Nemitkin ; P V Neoustroev ; C Newsom ; A P Nilov ; S B Nurushev ; A Ocherashvili ; E Oliveira ; Y Onel ; E Ozel ; S Ozkorucuklu ; A Penzo ; S V Petrenko ; P Pogodin ; M Procario ; V A Prutskoi ; E Ramberg ; G F Rappazzo ; B V Razmyslovich ; V I Rud ; J Russ ; P Schiavon ; J Simon ; A I Sitnikov ; D Skow ; V J Smith ; M Srivastava ; V Steiner ; V Stepanov ; L Stutte ; M Svoiski ; N K Terentyev ; G P Thomas ; L N Uvarov ; A N Vasiliev ; D V Vavilov ; V S Verebryusov ; V A Victorov ; V E Vishnyakov ; A A Vorobyov ; K Vorwalter ; J You ; Zhao Wenheng ; Zheng Shuchen ; R Zukanovich-Funchal ;
Date 9 Sep 2002
Journal Phys Rev Lett, 89 (11), 112001
AbstractWe observe a signal for the doubly charmed baryon Xi(+)(cc) in the charged decay mode Xi(+)(cc)-->Lambda(+)(c)K-pi(+) in data from SELEX, the charm hadroproduction experiment at Fermilab. We observe an excess of 15.9 events over an expected background of 6.1+/-0.5 events, a statistical significance of 6.3sigma. The observed mass of this state is 3519+/-1 MeV/c(2). The Gaussian mass width of this state is 3 MeV/c(2), consistent with resolution; its lifetime is less than 33 fs at 90% confidence.
Source PubMed, pmid12225136
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