Measurement of branching fractions for B -> J/psi eta K decays and search for a narrow resonance in the J/psi eta final state
文献类型：期刊论文
| 作者 | Belle Collaboration |
| 刊名 | PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
 |
| 出版日期 | 2014 |
| 期号 | 4 |
| 关键词 | X(3872) CHARMONIUM MECHANISM DETECTOR MESONS KEKB |
| 通讯作者 | Iwashita, T (reprint author), Nara Womens Univ, Nara 6308506, Japan. |
| 英文摘要 | We report an observation of the B-+/- -> J/psi eta K-+/- and B-0 -> J/psi eta K-S(0) decays using 772 x 10(6)B (B) over bar pairs collected at the gamma (4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We obtain the branching fractions B(B-+/- -> J/psi eta K-+/-) = (1.27 +/- 0.11 (stat.) +/- 0.11 ( syst.)) x 10(- 4) and B(B-0 -> J/psi eta K-S(0)) = ( 5.22 +/- 0.78 (stat.) +/- 0.49 (syst.)) x 10(-5). We search for a new narrow charmonium(- like) state X in the J/psi eta mass spectrum and find no significant excess. We set upper limits on the product of branching fractions, B(B-+/- -> XK +/-) B(X -> J/psi eta), at 3872 MeV c(-2) where a C-odd partner of X(3872) may exist, psi(4040) and psi(4160) assuming their known mass and width, and over a range from 3.8 to 4.8 GeV c(-2). The obtained upper limits at 90% confidence level for XC-odd(3872), psi(4040), and psi(4160) are 3.8 x 10(-6), 15.5 x 10(-6), and 7.4 x 10(-6), respectively. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000336146500014 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/213711]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Belle Collaboration. Measurement of branching fractions for B -> J/psi eta K decays and search for a narrow resonance in the J/psi eta final state[J]. PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS,2014(4). |
| APA | Belle Collaboration.(2014).Measurement of branching fractions for B -> J/psi eta K decays and search for a narrow resonance in the J/psi eta final state.PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS(4). |
| MLA | Belle Collaboration."Measurement of branching fractions for B -> J/psi eta K decays and search for a narrow resonance in the J/psi eta final state".PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS .4(2014). |
入库方式： OAI收割
来源：高能物理研究所
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