| Literature DB >> 15697795 |
A V Evdokimov1, U Akgun, G Alkhazov, J Amaro-Reyes, A G Atamantchouk, A S Ayan, 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, 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, M Mattson, 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, Y Onel, E Ozel, S Ozkorucuklu, A Penzo, S V Petrenko, P Pogodin, M Procario, 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, I Torres, L N Uvarov, A N Vasiliev, D V Vavilov, E Vázquez-Jáuregui, V S Verebryusov, V A Victorov, V E Vishnyakov, A A Vorobyov, K Vorwalter, J You, Zhao Wenheng, Zheng Shuchen, R Zukanovich-Funchal.
Abstract
We report the first observation of a charm-strange meson D(+)(sJ)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(+)(s)eta and D0K+. In the D(+)(s)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode D0K+. The decay width of this state is <17 MeV/c(2) at 90% confidence level. The relative branching ratio Gamma(D0K+)/Gamma(D(+)(s)eta) is 0.14+/-0.06. The mechanism that keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the D(+)(s)eta decay mode.Entities:
Year: 2004 PMID： 15697795 DOI： 10.1103/PhysRevLett.93.242001
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161