First study of eta(c)(1S), eta(1760) and X(1835) production via eta 'pi(+)pi(-) final states in two-photon collisions
文献类型：期刊论文
| 作者 | Belle Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2012 |
| 卷号 | 86期号:5 |
| 关键词 | DECAY BARYONIUM THRESHOLD BELLE |
| 通讯作者 | Zhang, CC (reprint author), SB RAS, Budker Inst Nucl Phys, Novosibirsk 630090, Russia. |
| 英文摘要 | The invariant mass spectrum of the eta 'pi(+)pi(-) final state produced in two-photon collisions is obtained using a 673 fb(-1) data sample collected in the vicinity of the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a clear signal of the eta(c)(1S) and measure its mass and width to be Md(eta(c)(1S)) = (2982.7 +/- 1.8(stat) +/- 2.2(syst) +/- 0.3(model)) MeV/c(2) and Gamma(eta(c)(1S)) = (37.8(-5.3)(+5.8)(stat) +/- 2.8(syst) +/- 1.4(model)) MeV/c(2). The third error is an uncertainty due to possible interference between the eta(c)(1S) and a nonresonant component. We also report the first evidence for eta(1760) decay to eta'pi(+)pi(-); we find two solutions for its parameters, depending on the inclusion or not of the X(1835), whose existence is of marginal significance in our data. From a fit to the mass spectrum using coherent X(1835) and eta(1760) resonant amplitudes, we set a 90% confidence level upper limit on the product Gamma B-gamma gamma(eta'pi(+)pi(-)) for the X(1835). |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000308530000001 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/213326]  |
| 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. First study of eta(c)(1S), eta(1760) and X(1835) production via eta 'pi(+)pi(-) final states in two-photon collisions[J]. PHYSICAL REVIEW D,2012,86(5). |
| APA | Belle Collaboration.(2012).First study of eta(c)(1S), eta(1760) and X(1835) production via eta 'pi(+)pi(-) final states in two-photon collisions.PHYSICAL REVIEW D,86(5). |
| MLA | Belle Collaboration."First study of eta(c)(1S), eta(1760) and X(1835) production via eta 'pi(+)pi(-) final states in two-photon collisions".PHYSICAL REVIEW D 86.5(2012). |
入库方式： OAI收割
来源：高能物理研究所
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