Total cross section of the process e+e−→π+π−π+π− in the c.m. energy range 980–1380 MeV
Total cross section of the process e+e−→π+π−π+π− in the c.m. energy range 980–1380 MeV
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DOI：
10.1016/j.physletb.2004.05.056
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发表时间：
2004-04
影响因子：
4.4
通讯作者：
R. Akhmetshin;E. al.
中科院分区：
文献类型：
--
作者：
R. Akhmetshin;E. al.
在VePP-2M对撞机上用Cmd-2探测器收集的5.8pb−→π+π−π+π−1积分光度测量了e+e−截面。通过改进效率测定和使用三轨和四轨事件对数据进行分析，可以使数据样本增加一倍，并将系统误差减少到5-7%。
The e+e−→π+π−π+π−cross section has been measured using 5.8 pb−1of integrated luminosity collected with the CMD-2 detector at the VEPP-2M collider. Analysis of the data with a refined efficiency determination and use of both three- and four-track events allowed doubling of a data sample and reduction of systematic errors to 5–7%.