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Observation of B --> J/psi K(1)(1270).
Abe, K; Abe, K; Adachi, I; Ahn, B S; Aihara, H; Asano, Y; Aso, T; Aulchenko, V; Aushev, T; Bakich, A M; Banas, E; Bartel, W; Behari, S; Behera, P K; Beiline, D; Bondar, A; Bozek, A; Browder, T E; Casey, B C; Chang, P; Chao, Y; Cheon, B G; Choi, S K; Choi, Y; Dragic, J; Drutskoy, A; Eidelman, S; Enari, Y; Fang, F; Fujii, H; Fukunaga, C; Fukushima, M; Garmash, A; Gordon, A; Gotow, K; Guo, R; Haba, J; Hamasaki, H; Hanagaki, K; Hara, K; Hara, T; Hastings, N C; Hayashii, H; Hazumi, M; Heenan, E M; Higasino, Y; Higuchi, I; Higuchi, T; Hirano, H; Hojo, T.
Afiliación
  • Abe K; High Energy Accelerator Research Organization (KEK), Tsukuba, Japan.
Phys Rev Lett ; 87(16): 161601, 2001 Oct 15.
Article en En | MEDLINE | ID: mdl-11690197
We report the first observation of the exclusive decay process B-->J/psi K(1)(1270) using a sample of 11.2M BB macro meson pairs collected in the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. We measure branching fractions of B[B(0)-->J/psi K(0)(1)(1270)] = (1.30+/-0.34+/-0.32) x 10(-3) and B[B(+)-->J/psi K(+)(1)(1270)] = (1.80+/-0.34+/-0.39) x 10(-3), where the first error is statistical and the second is systematic. These modes constitute approximately 15% of the total number of B-->J/psi X decays. No evidence is seen for B-->J/psi K(1)(1400) and we set an upper limit for this branching fraction.
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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2001 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos
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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2001 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos