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Reevaluation of the hadronic contribution to the muon magnetic anomaly using new e(+)e(-) -> pi(+)pi(-) cross section data from BABAR
Davier, M; Hoecker, A; Malaescu, B; Yuan, CZ; Zhang, Z; Yuan ZZ(苑长征)
2010
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号66期号:1-2页码:1-9
通讯作者Davier, M (reprint author), Univ Paris 11, CNRS, Lab Accelerateur Lineaire, IN2P3, F-91405 Orsay, France.
摘要Using recently published, high-precision pi(+)pi(-) cross section data by the BABAR experiment from the analysis of e(+)e(-) events with high-energy photon radiation in the initial state, we reevaluate the lowest order hadronic contribution (a(mu)(had,LO)) to the anomalous magnetic moment of the muon. We employ newly developed software featuring improved data interpolation and averaging, more accurate error propagation and systematic validation. With the new data, the discrepancy between the e(+)e(-) - and tau-based results for the dominant two-pion mode reduces from previously 2.4 sigma to 1.5 sigma in the dispersion integral, though significant local discrepancies in the spectra persist. We obtain for the e(+)e(-)-based evaluation a(mu)(had,LO) = (695.5+/-4.1) x10-(10), where the error accounts for all sources. The full Standard Model prediction of a(mu) differs from the experimental value by 3.2 sigma.
文章类型Article
学科领域Physics
DOI10.1140/epjc/s10052-010-1246-1
收录类别SCI
WOS类目Physics, Particles & Fields
WOS记录号WOS:000275453500001
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被引频次:114[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/311005/225432
专题实验物理中心
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Davier, M,Hoecker, A,Malaescu, B,et al. Reevaluation of the hadronic contribution to the muon magnetic anomaly using new e(+)e(-) -> pi(+)pi(-) cross section data from BABAR[J]. EUROPEAN PHYSICAL JOURNAL C,2010,66(1-2):1-9.
APA Davier, M,Hoecker, A,Malaescu, B,Yuan, CZ,Zhang, Z,&苑长征.(2010).Reevaluation of the hadronic contribution to the muon magnetic anomaly using new e(+)e(-) -> pi(+)pi(-) cross section data from BABAR.EUROPEAN PHYSICAL JOURNAL C,66(1-2),1-9.
MLA Davier, M,et al."Reevaluation of the hadronic contribution to the muon magnetic anomaly using new e(+)e(-) -> pi(+)pi(-) cross section data from BABAR".EUROPEAN PHYSICAL JOURNAL C 66.1-2(2010):1-9.
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