Voltar
Artigo Acesso aberto Produção Nacional Revisado por pares
BIBTEX RIS

First Observation of the Doubly Charmed Baryon Ξ c c +

2002; American Physical Society; Volume: 89; Issue: 11 Linguagem: Inglês

10.1103/physrevlett.89.112001

ISSN

1092-0145

Autores

M. E. Mattson, G. Alkhazov, A. G. Atamantchouk, M.Y. Balatz, Nikolay Bondar, P. S. Cooper, L. Dauwe, G.V. Davidenko, U. Dersch, A. Dolgolenko, G.B. Dzyubenko, R. Edelstein, Luiz Emediato, A. M. F. Endler, J. Engelfried, I. Eschrich, C. O. Escobar, A. Evdokimov, I. S. Filimonov, F. G. Garcia, M. Gaspero, I. Giller, V. L. Golovtsov, P. Gouffon, E. Gülmez, Kangling He, M. Iori, S. Y. Jun, M. Kaya, J. Kilmer, V. Kim, L. M. Kochenda, I. Konorov, А. П. Кожевников, A. Krivshich, H. Krüger, M. Kubantsev, Valery 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, Yunshan Li, M. Luksys, T. Lungov, V. P. Maleev, Dan Mao, Chensheng Mao, Zhenlin Mao, P. Mathew, V. Matveev, E. McCliment, M. A. Moinester, V. V. Molchanov, A. Morelos, K. D. Nelson, A.V. Nemitkin, P. V. Neoustroev, C. R. Newsom, A.P. Nilov, S. B. Nurushev, A. Ocherashvili, Emmanuel de Oliveira, Y. Onel, E. Ozel, S. Özkorucuklu, A. Penzo, S. V. Petrenko, P. Pogodin, M. Procario, V. A. Prutskoi, E. Ramberg, G.F. Rappazzo, B. V. Razmyslovich, V. I. Ruď, J. Russ, P. Schiavon, J. Simon, А. И. Ситников, D. Skow, V. J. Smith, M. K. Srivastava, V. Steiner, В. В. Степанов, L. Stutte, M. Svoiski, N. K. Terentyev, G. Thomas, L. Uvarov, A. N. Vasiliev, D. V. Vavilov, V.S. Verebryusov, V.A. Victorov, V.E. Vishnyakov, A.A. Vorobyov, K. Vorwalter, J.M. You, W. Zhao, Zheng Shuchen, R. Zukanovich Funchal,

Tópico(s)

High-Energy Particle Collisions Research

Resumo

We 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.

Referência(s)