Search for D0-D0 mixing with double-layer TOF at BESIII

Yong Zhao Sun, Kang Lin He, Wei Dong Li, Jian Ming Bian, Guo Fu Cao, Zi Yan Deng, Miao He, Bin Huang, Xiao Bin Ji, Gang Li, Hai Bo Li, Chun Xiu Liu, Huai Min Liu, Qiu Mei Ma, Xiang Ma, Ya Jun Mao, Ze Pu Mao, Xiao Hu Mo, Jin Fa Qiu, Sheng Sen SunJi Ke Wang, Liang Liang Wang, Shuo Pin Wen, Ling Hui Wu, Yu Guang Xie, Ming Yang, Zheng Yun You, Guo Wei Yu, Chang Zheng Yuan, Ye Yuan, Shi Lei Zang, Chang Chun Zhang, Jian Yong Zhang, Ling Zhang, Xue Yao Zhang, Yao Zhang, Zhi Peng Zheng, Yong Sheng Zhu, Jia Heng Zou

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The decay of D0 → K-π+ is a golden channel in the study of D0-D̄0 mixing at ψ(3770). The requirements of excellent K/π separation will play an essential role in the mixing search. A technique was developed to precisely extract event start time (to) with TOF measurements in multiple charged tracks event at BESIII. After the to extracting algorithm, the time resolution of double-layer TOF reduced from ∼78ps to ∼64ps, the upper limit of D 0-D̄0 mixing rate at 95% CL can be improved by a factor of 7% in 20fb-1 ψ(3770) data.

Original languageEnglish (US)
Pages (from-to)423-430
Number of pages8
JournalKao Neng Wu Li Yu Ho Wu Li/High Energy Physics and Nuclear Physics
Volume31
Issue number5
StatePublished - May 2007

Keywords

  • D-D mixing
  • D→K π particle identification
  • Event start time
  • TOF

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