BESIII 
π+π-
形状因子测量以及
π+π-π0
展望

doi:10.3969/j.issn.0253-2778.2016.04.007

中国科学技术大学学报 ›› 2016, Vol. 46 ›› Issue (4): 301-307.DOI: 10.3969/j.issn.0253-2778.2016.04.007

BESIII π+π- 形状因子测量以及 π+π-π0 展望

王亚乾（BESIII合作组）

美因茨大学, 美因茨 55128，德国

收稿日期:2015-11-30 修回日期:2016-04-20 出版日期:2016-04-30 发布日期:2016-04-30
作者简介:WANG Yaqian, male, born in 1984, PhD. Research field: particle physics. E-mail:whyaqm@gmail.com

BESIII π+π- form factor measurement and perspective of π+π-π0

WANG Yaqian (for the BESIII Collaboration)

Johannes-Gutenberg University, Mainz 55128, Germany

Received:2015-11-30 Revised:2016-04-20 Online:2016-04-30 Published:2016-04-30

摘要/Abstract

摘要： 利用BESIII在3773 GeV获取的293 fb-1数据，测量了600~900 MeV/c2区间e+e-→π+π-的截面.分析主要基于初态辐射的方法，总的系统误差控制在09%.通过计算得到的形状因子|Fπ|2与其他两个实验做了比较.两π过程对缪子反常磁矩的贡献为aππ,LOμ(600~900 MeV/c2)=(3682±25stat±33sys)×10-10.

关键词: 缪子反常磁矩, 真空极化, 初态辐射

Abstract: The cross section is measured of e+e-→π+π- in the energy range between 600 and 900 MeV/c2 with a 2.93 fb-1 data set taken at the center-of-mass energy 3773 GeV at BESIII. The initial state radiation technique is used, and the total systematic uncertainty is estimated to be 09%. The squared form factor |Fπ|2 is extracted, and comparisons are made with results from both KLOE and BaBar. The two-pion contribution to the hadronic vacuum polarization contribution to (g-2)μ is calculated to be aππ,LOμ(600~900 MeV/c2)=(3682±25stat±33sys)×10-10.

Key words: muon anomalous magnetic moment g-2, vacuum polarization, initial state radiation (ISR)

王亚乾（BESIII合作组）. BESIII π+π- 形状因子测量以及 π+π-π0 展望[J]. 中国科学技术大学学报, 2016, 46(4): 301-307.

WANG Yaqian (for the BESIII Collaboration). BESIII π+π- form factor measurement and perspective of π+π-π0 [J]. Journal of University of Science and Technology of China, 2016, 46(4): 301-307.

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BESIII π+π- 形状因子测量以及 π+π-π0 展望

BESIII π+π- form factor measurement and perspective of π+π-π0

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