Relative Likelihood and e/π Separation at BES

Ye Shuwei; Chen Hongfang; Wu Jian; Zhang Ziping; Niu Hongquan; Xu Tong; Tong Guoliang; LV Feng; Li Yong; Zeng Jiyang; Wu Yigen; Yi Kai; Chen Xiangyang; Xu Mi

Chinese Physics C> 1995, Vol. 19> Issue(12) : 1072-1077

Relative Likelihood and e/π Separation at BES

Department of Modern Physics, University of Science and Technology of China, Hefei 2300272 Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 1000393 Department of Physics, Hangzhou University, Hangzhou 310028

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Abstract：
On the basis of particle identification methods at BES, this paper proposes a so-called relative likelihood method. The method makes the most use of the information provided by the BES, and apparently improves the particle identification efficiency with lower misidentification compared with the simple cut method. With this method, several studies in τ physics were done and good results have been obtained.

References

[1]	BES Collaboration,Phys.Rev.Lett,69（1992）3021.[2] 曾吉阳等，BES上mτ，测量中非eμ道的选择，1st BES Annual Meeting,承德，1992年6月。[3] 叶树伟，BEPC/BES上米歇尔参数ρτ→e的测量，中国科大硕士论文，1994年6月。[4] 吕峰等，BES上τ+→p+vτ分支比的测量，3rd BES Annual Meeting,杭州，1994年7月。[5] 李勇等，BES上τ+→分支比研究，3rd BES Annual Meeting,杭州，1994年7月。

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Ye Shuwei, Chen Hongfang, Wu Jian, Zhang Ziping, Niu Hongquan, Xu Tong, Tong Guoliang, LV Feng, Li Yong, Zeng Jiyang, Wu Yigen, Yi Kai, Chen Xiangyang and Xu Mi. Relative Likelihood and e/π Separation at BES[J]. Chinese Physics C, 1995, 19(12): 1072-1077.

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

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