A simulation study on the measurement of D°-D° mixing parameter y at BESIII

Bin Huang, Yang Henghtl Zheng, Wei Dong Li, Jian Ming Bian, Guo Fu Cao, Xue Xiang Cao, Shen Jian Chen, Zi Yan Deng, Cheng Dong Fu, Yuan Ning Gao, Kang Lin He, Miao He, Chun Fci Hua, Xmg Tao Huang, Xiao Bini Ji, Hai Bo Li, Yu Tie Liang, Chun Xiu Liu, Huai Min Liu, Qiu Guang LiuSuo Liu, Ying Jie Liu, Qin Mei Ma, Xiang Ma, Ya Jun Mao, Ze Pu Mao, Xiao Hu Mo, Ming Hua Pan, Cai Ying Pang, Rong Gang Ping, Gang Qin, Ya Hong Qin, Jin Fa Qiu, Sbeng Sen Sun, Yong Zhaotcbs Sun, Ji Ke Wang, Liang Liang Wang, Shuo Pini Wen, Ling Hui Wu, Yu Guang Xie, Min Xu, Liang Yan, Zheng Yun You, Guo Wei Yu, Chang Zheng Yuan, Ye Yuan, Chang Chun Zhang, Jian Yongg Zhang, Xue Yao Zhang, Yao Zhang, Yong Shenglc Zhu, Z. M Li Zhu, Jia Heng Zou

Research output: Contribution to journalArticlepeer-review

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Abstract

We established a method on measuring the D°-D° mixing parameter y for BESHI experiment at the BEPCII e+e collider. In this method, the doubly tagged ↓(3770) -> D°D° events, with one D decays to CP-eigenstates and the other D decays semileptonically, are used to reconstruct the signals. Since this analysis requires good e/π separation, a likelihood approach, which combines the dE/dx, time of flight and the electromagnetic shower detectors information, is used for particle identification. We estimate the sensitivity of the measurement of y to be 0.007 based on a 20 fb -1 fully simulated MC sample.

Original languageEnglish (US)
Pages (from-to)945-951
Number of pages7
JournalChinese Physics C
Volume32
Issue number12
DOIs
StatePublished - Dec 2008

Keywords

  • D°-d°
  • Electron identification
  • Likelihood
  • Mixing
  • Mixing parameter y

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