Measurement of the branching ratio and search for a CP violating asymmetry in the eta -> pi(+)pi(-)e(+)e(-)(gamma) decay at KLOE
文献类型：期刊论文
| 作者 | KLOE Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2009 |
| 卷号 | 675期号:3--4页码:283-288 |
| 关键词 | MONTE-CARLO ETA->PI(+)PI(-)E(+)E(-) DETECTOR PHOTOS |
| 通讯作者 | Giovannella, S (reprint author), Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy. |
| 英文摘要 | We have studied the eta -> pi(+)pi(-)e(+)e(-)(gamma) decay using about 1.7 fb(-1) collected by the KLOE experiment at the DA Phi NE phi-factory. This corresponds to about 72 millions eta mesons produced in phi radiative decays. We have measured the branching ratio, inclusive of radiative effects, with 4% accuracy: BR(eta -> pi(+)pi(-)e(+)e(-)(gamma)) = (26.8 +/- 0.9(stat.)+/- 0.7(syst.)) x 10(-5). We have obtained the first measurement of the CP-odd pi pi-ee decay planes angular asymmetry, A(phi) = (-0.6 +/- 2.5(Stat.)+/- 1.8(Syst.)) x 10(-2). (C) 2009 Elsevier B.V. All rights reserved. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000266369300003 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212897]  |
| 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 | KLOE Collaboration. Measurement of the branching ratio and search for a CP violating asymmetry in the eta -> pi(+)pi(-)e(+)e(-)(gamma) decay at KLOE[J]. PHYSICS LETTERS B,2009,675(3--4):283-288. |
| APA | KLOE Collaboration.(2009).Measurement of the branching ratio and search for a CP violating asymmetry in the eta -> pi(+)pi(-)e(+)e(-)(gamma) decay at KLOE.PHYSICS LETTERS B,675(3--4),283-288. |
| MLA | KLOE Collaboration."Measurement of the branching ratio and search for a CP violating asymmetry in the eta -> pi(+)pi(-)e(+)e(-)(gamma) decay at KLOE".PHYSICS LETTERS B 675.3--4(2009):283-288. |
入库方式： OAI收割
来源：高能物理研究所
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