The discrepancy between tau and e (+) e (-) spectral functions revisited and the consequences for the muon magnetic anomaly
Davier, M; Hoecker, A; Castro, GL; Malaescu, B; Mo, XH; Sanchez, GT; Wang, P; Yuan, CZ; Zhang, Z; Mo XH(莫晓虎); 王平(实); Yuan ZZ(苑长征)
刊名EUROPEAN PHYSICAL JOURNAL C
2010
卷号66期号:1-2页码:#REF!
学科分类Physics
DOI10.1140/epjc/s10052-009-1219-4
通讯作者Davier, M (reprint author), Univ Paris 11, CNRS, Lab Accelerateur Lineaire, IN2P3, F-91405 Orsay, France.
文章类型Article
英文摘要We revisit the procedure for comparing the pi pi spectral function measured in tau decays to that obtained in e (+) e (-) annihilation. We re-examine the isospin-breaking corrections using new experimental and theoretical input and find improved agreement between the tau (-)->pi (-) pi (0) nu (tau) branching fraction measurement and its prediction using the isospin-breaking-corrected e (+) e (-)->pi (+) pi (-) spectral function, though not resolving all discrepancies. We recompute the lowest order hadronic contributions to the muon g-2 using e (+) e (-) and tau data with the new corrections and find a reduced difference between the two evaluations. The new tau-based estimate of the muon magnetic anomaly is found to be 1.9 standard deviations lower than the direct measurement.
类目[WOS]Physics, Particles & Fields
收录类别SCI
WOS记录号WOS:000275453500007
引用统计
被引频次:71[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/311005/226353
专题中国科学院高能物理研究所_实验物理中心_期刊论文
中国科学院高能物理研究所_实验物理中心
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Davier, M,Hoecker, A,Castro, GL,et al. The discrepancy between tau and e (+) e (-) spectral functions revisited and the consequences for the muon magnetic anomaly[J]. EUROPEAN PHYSICAL JOURNAL C,2010,66(1-2):#REF!.
APA Davier, M.,Hoecker, A.,Castro, GL.,Malaescu, B.,Mo, XH.,...&苑长征.(2010).The discrepancy between tau and e (+) e (-) spectral functions revisited and the consequences for the muon magnetic anomaly.EUROPEAN PHYSICAL JOURNAL C,66(1-2),#REF!.
MLA Davier, M,et al."The discrepancy between tau and e (+) e (-) spectral functions revisited and the consequences for the muon magnetic anomaly".EUROPEAN PHYSICAL JOURNAL C 66.1-2(2010):#REF!.
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