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High-statistics study of the tau(-)->pi(-)pi(0)nu(tau) decay
Belle Collaboration
2008
发表期刊PHYSICAL REVIEW D
卷号78期号:7
通讯作者Fujikawa, M (reprint author), Nara Womens Univ, Nara 630, Japan.
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.
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
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.78.072006
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000260574800019
引用统计
被引频次:116[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/212880
专题实验物理中心
作者单位中国科学院高能物理研究所
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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).
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