Reevaluation of the hadronic contribution to the muon magnetic anomaly using new e(+)e(-) -> pi(+)pi(-) cross section data from BABAR

	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)
刊名	EUROPEAN PHYSICAL JOURNAL C
	2010
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.
英文摘要	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.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
WOS记录号	WOS:000275453500001
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225432]
专题	高能物理研究所_实验物理中心
推荐引用方式 GB/T 7714	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.