A Semi-Experimental Method to Determine the Efficiency of Selecting ττ→eμ(v)

Chen Hongfang; LV Feng; Tong Cuoliang; Wu Jian; Wu Yigen; Xu Mianhai; Xu Yadi; Xu Mingkang; Ye Shuwei; Yu Yankua; Zeng Jiyang; Zhong Chongchang; Zhu Hongguo

Chinese Physics C> 1994, Vol. 18> Issue(7) : 577-582

A Semi-Experimental Method to Determine the Efficiency of Selecting ττ→eμ(v)

Institute of High Energy Physics,Beijing 1000392 Department of modern physics,USTC, Hefei 2300263 Department,of Physics,Hangzhou Uniuersity, Zhejiang, 310028

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Abstract：
The efficiency of event selection is an important parameter in the measurement of r lepton mass.In our study we use so-called semi-experimental method in which we combine M.C. events and experimental data. With this method the efficiency of selectingττ→eμ(v) is obtained as (14.5±0.7±0.8)%,and various relevant corrections are discussed. The result is consistent with that derived from two-parameter fitting of τlepton mass.

References

[1]	A.Pich,TAU PHYSICS:CERN-TH-6237/91.[2]Stauislaw Jadach et.al,KORALB:CEKN-TH-5855/90;Stanislaw Jadach,TAUOLA:CEKN-TH-5856/90.[3]吕锋、曾吉阳，J/ψ数据中e、μ和π样本的选取，BES内部报告，1992.1.[4]伍健，τ轻子质量测量中τ事例选择及eμ道选择效率的确定，中国科技大学学士毕业论文，1992.7.[5]吕锋，ττ→eμ（v）事例选择，BES内部报告，1992.1.[6]J.Z.Bai et al.,Phys.Rev.Lett.,69（1992）3021.

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Chen Hongfang, LV Feng, Tong Cuoliang, Wu Jian, Wu Yigen, Xu Mianhai, Xu Yadi, Xu Mingkang, Ye Shuwei, Yu Yankua, Zeng Jiyang, Zhong Chongchang and Zhu Hongguo. A Semi-Experimental Method to Determine the Efficiency of Selecting ττ→eμ(v)[J]. Chinese Physics C, 1994, 18(7): 577-582.

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Received: 1900-01-01
Revised: 1900-01-01

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