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04 July 2020
 
  » pubmed » pmid15697795

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Observation of a narrow charm-strange meson D(+)(sJ)(2632)-->D(+)(s)eta and D(0)K(+)
A V Evdokimov ; 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 ; ;
Date 10 Dec 2004
Journal Phys Rev Lett, 93 (24), 242001
AbstractWe 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.
Source PubMed, pmid15697795
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