@article{e7505d68eb8949788db04304863d4aa6,

title = "Observation of B → J/ψK1(1270)",

abstract = "We report the first observation of the exclusive decay process B → J/ψK1(1270) using a sample of 1102M BB{\textregistered} meson pairs collected in the Belle detector at the KEKB asymmetric energy e+e− collider. We measure branching fractions of B[B0 → J/ψK01(1270)] =(1.30 ± 0.34 ± 0.32) × 10→3 and B[B+ J/ψK+1(1270)] = (1.80 ± 0.34 ± 0.39) × 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/ψX decays. No evidence is seen for B → J/ψK1(1400) and we set an upper limit for this branching fraction.",

author = "{Belle Collaboration} and K. Abe and K. Abe and I. Adachi and Ahn, {Byoung Sup} and H. Aihara and Y. Asano and T. Aso and V. Aulchenko and T. Aushev and Bakich, {A. M.} and E. Banas and W. Bartel and S. Behari and Behera, {P. K.} and D. Beiline and A. Bondar and A. Bozek and Browder, {T. E.} and Casey, {B. C.K.} and P. Chang and Y. Chao and Cheon, {B. G.} and Choi, {S. K.} and Y. Choi and J. Dragic and A. Drutskoy and S. Eidelman and Y. Enari and F. Fang and H. Fujii and C. Fukunaga and M. Fukushima and A. Garmash and A. Gordon and K. Gotow and R. Guo and J. Haba and H. Hamasaki and K. Hanagaki and K. Hara and T. Hara and Hastings, {N. C.} and H. Hayashii and M. Hazumi and Heenan, {E. M.} and Y. Higasino and I. Higuchi and T. Higuchi and H. Hirano and H. Ishino",

year = "2001",

month = sep,

day = "27",

doi = "10.1103/PhysRevLett.87.161601",

language = "English",

volume = "87",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "16",

}