High-statistics study of the tau(-)->pi(-)pi(0)nu(tau) decay
文献类型：期刊论文
| 作者 | Belle Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2008 |
| 卷号 | 78期号:7 |
| 关键词 | ELECTROWEAK RADIATIVE-CORRECTIONS HADRONIC TAU-DECAYS ANOMALOUS MAGNETIC-MOMENT PI(+)PI(-) CROSS-SECTION MONTE-CARLO SIMULATION PION FORM-FACTOR SPECTRAL FUNCTIONS E(+)E(-) ANNIHILATION BRANCHING RATIOS CMD-2 DETECTOR |
| 通讯作者 | Fujikawa, M (reprint author), Nara Womens Univ, Nara 630, Japan. |
| 英文摘要 | We report a high-statistics measurement of the branching fraction for tau(-)->pi(-)pi(0)nu(tau) and the invariant mass spectrum of the produced pi(-)pi(0) system using 72.2 fb(-1) of data recorded with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The branching fraction obtained is (25.24 +/- 0.01 +/- 0.39)%, where the first error is statistical and the second is systematic. The unfolded pi(-)pi(0) mass spectrum is used to determine resonance parameters for the rho(770), rho(')(1450), and rho('')(1700) mesons. We also use this spectrum to estimate the hadronic (2 pi) contribution to the anomalous magnetic moment of the muon (a(mu)(pi pi)). Our result for a(mu)(pi pi) integrated over the mass range root s=2m(pi)-1.8 GeV/c(2) is a(mu)(pi pi)=(523.5 +/- 1.5(exp)+/- 2.6(Br)+/- 2.5(isospin))x10(-10), where the first error is due to the experimental uncertainties, the second is due to the uncertainties in the branching fractions, and the third is due to the uncertainties in the isospin-violating corrections. |
| 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:000260574800019 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212880]  |
| 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. High-statistics study of the tau(-)->pi(-)pi(0)nu(tau) decay[J]. PHYSICAL REVIEW D,2008,78(7). |
| APA | Belle Collaboration.(2008).High-statistics study of the tau(-)->pi(-)pi(0)nu(tau) decay.PHYSICAL REVIEW D,78(7). |
| MLA | Belle Collaboration."High-statistics study of the tau(-)->pi(-)pi(0)nu(tau) decay".PHYSICAL REVIEW D 78.7(2008). |
入库方式： OAI收割
来源：高能物理研究所
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