Observation of B → J/ψK1(1270)

Belle Collaboration

Research output: Contribution to journalArticle

Abstract

We report the first observation of the exclusive decay process B → J/ψK1(1270) using a sample of 1102M BB® 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.

Original languageEnglish
JournalPhysical Review Letters
Volume87
Issue number16
DOIs
Publication statusPublished - 2001 Sep 27

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decay
mesons
detectors
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Belle Collaboration. / Observation of B → J/ψK1(1270). In: Physical Review Letters. 2001 ; Vol. 87, No. 16.
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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{\circledR} 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 Youngjoon Kwon",
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Observation of B → J/ψK1(1270). / Belle Collaboration.

In: Physical Review Letters, Vol. 87, No. 16, 27.09.2001.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Observation of B → J/ψK1(1270)

AU - Belle Collaboration

AU - Abe, K.

AU - Abe, K.

AU - Adachi, I.

AU - Ahn, Byoung Sup

AU - Aihara, H.

AU - Asano, Y.

AU - Aso, T.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Bakich, A. M.

AU - Banas, E.

AU - Bartel, W.

AU - Behari, S.

AU - Behera, P. K.

AU - Beiline, D.

AU - Bondar, A.

AU - Bozek, A.

AU - Browder, T. E.

AU - Casey, B. C.K.

AU - Chang, P.

AU - Chao, Y.

AU - Cheon, B. G.

AU - Choi, S. K.

AU - Choi, Y.

AU - Dragic, J.

AU - Drutskoy, A.

AU - Eidelman, S.

AU - Enari, Y.

AU - Fang, F.

AU - Fujii, H.

AU - Fukunaga, C.

AU - Fukushima, M.

AU - Garmash, A.

AU - Gordon, A.

AU - Gotow, K.

AU - Guo, R.

AU - Haba, J.

AU - Hamasaki, H.

AU - Hanagaki, K.

AU - Hara, K.

AU - Hara, T.

AU - Hastings, N. C.

AU - Hayashii, H.

AU - Hazumi, M.

AU - Heenan, E. M.

AU - Higasino, Y.

AU - Higuchi, I.

AU - Higuchi, T.

AU - Hirano, H.

AU - Kwon, Youngjoon

PY - 2001/9/27

Y1 - 2001/9/27

N2 - We report the first observation of the exclusive decay process B → J/ψK1(1270) using a sample of 1102M BB® 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.

AB - We report the first observation of the exclusive decay process B → J/ψK1(1270) using a sample of 1102M BB® 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.

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U2 - 10.1103/PhysRevLett.87.161601

DO - 10.1103/PhysRevLett.87.161601

M3 - Article

VL - 87

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 16

ER -