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; SELEX

doi:10.1103/PhysRevLett.93.242001

Observation of a narrow charm-strange meson D(+)(sJ)(2632)-->D(+)(s)eta and D(0)K(+)

Phys Rev Lett. 2004 Dec 10;93(24):242001. doi: 10.1103/PhysRevLett.93.242001. Epub 2004 Dec 10.

Authors

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; SELEX

Affiliation

¹ Ball State University, Muncie, IN 47306, USA.

PMID: 15697795
DOI: 10.1103/PhysRevLett.93.242001

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.