Muon identification in the Belle experiment at KEKB

A. Abashian, K. Abe, K. Abe, P. K. Behera, F. Handa, T. Iijima, Y. Inoue, H. Miyake, T. Nagamine, E. Nakano, S. Narita, L. Piilonen, S. Schrenk, Y. Teramoto, K. Trabelsi, J. G. Wang, M. Yamaga, A. Yamaguchi, Y. Yusa

Research output: Contribution to journalArticlepeer-review

120 Citations (Scopus)


This paper describes the muon identification method and its performance in the Belle experiment at KEKB. Muon and hadron likelihood are calculated for each track using its range and transverse scattering in the KL-and-muon detector (KLM). We apply a cut on the normalized muon likelihood ℒμ to identify the track as a muon. Above the detection threshold of 0.6 GeV/c, the measured muon detection efficiency and pion fake rate are approximately constant for momenta greater than 1.0 and 1.5 GeV/c, respectively. Between 1.0 and 3.0 GeV/c, the averaged muon detection efficiency is 89% and the pion fake rate per track is 1.4% over the KLM acceptance, using the standard selection criterion ℒμ0.9.

Original languageEnglish
Pages (from-to)69-82
Number of pages14
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1-2
Publication statusPublished - 2002 Sep 21
Externally publishedYes


  • Belle detector
  • KEKB
  • Muon identification

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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