Study of the branching ratio and charge asymmetry for the decay K-S -> pi e nu with the KLOE detector
文献类型：期刊论文
| 作者 | KLOE Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2006 |
| 卷号 | 636期号:3--4页码:173-182 |
| 关键词 | TAGGED NEUTRAL KAONS FORM-FACTORS LIFETIME SYSTEM |
| 通讯作者 | Gatti, C (reprint author), Ist Nazl Fis Nucl, Lab Nazl Frascati, Casella Postale 13, I-00044 Frascati, ROMA, Italy. |
| 英文摘要 | Among some 400 million KSKL pairs produced in e(+)e(-) annihilations at DA Phi DNE, similar to 6500 each of K-S -> pi(+)e(-)(v) over bar and K-S -> pi(-)e(+)v decays have been observed with the KLOE detector. From these, the ratio Gamma(K-S -> pi ev)/Gamma(K-S -> pi(+)pi(-)) = (10.19 +/- 0.13) x 10(-4) is obtained, improving the accuracy on BR(K-S -> pi ev) by a factor of four and providing the most precise test of the Delta S = Delta Q rule. From the partial width F(K-S -> pi ev), a value for f(+)(K0) (0) x V-us is obtained that is in agreement with unitarity of the quark-mixing matrix. The lepton charge asymmetry A(S) = (1.5 +/- 9.6(stat) 2.9(syst)) x 10(-3) is compatible with the requirements of CPT invariance. The form-factor slope agrees with recent results from semileptonic K-L and K+ decays. These are the first measurements of the charge asymmetry and form-factor slope for semileptonic K-S decays. (c) 2006 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:000237506900005 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212660]  |
| 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. Study of the branching ratio and charge asymmetry for the decay K-S -> pi e nu with the KLOE detector[J]. PHYSICS LETTERS B,2006,636(3--4):173-182. |
| APA | KLOE Collaboration.(2006).Study of the branching ratio and charge asymmetry for the decay K-S -> pi e nu with the KLOE detector.PHYSICS LETTERS B,636(3--4),173-182. |
| MLA | KLOE Collaboration."Study of the branching ratio and charge asymmetry for the decay K-S -> pi e nu with the KLOE detector".PHYSICS LETTERS B 636.3--4(2006):173-182. |
入库方式： OAI收割
来源：高能物理研究所
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