Search for fractionally charged particles in cosmic rays with the BESS spectrometer

H. Fuke, Y. Tasaki, K. Abe, S. Haino, Y. Makida, S. Matsuda, J. W. Mitchell, A. A. Moiseev, J. Nishimura, M. Nozaki, S. Orito, J. F. Ormes, M. Sasaki, E. S. Seo, Y. Shikaze, R. E. Streitmatter, J. Suzuki, K. Tanaka, T. Yamagami, A. YamamotoT. Yoshida, K. Yoshimura

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Historically, there are been many searches for fractionally charged particles in the cosmic radiation. However, few searches have been performed near the top of the atmosphere. We performed a search for relativistic frac(2, 3) e charged particles in cosmic rays using data collected during four BESS balloon flights from 1997 to 2000 carried out in northern Canada. The data were analyzed by examining energy deposition in the time-of-flight scintillator hodoscopes. No candidate was found. We derive an upper limit of 4.5 × 10-7 (cm2 s sr)-1 for the flux of frac(2, 3) e charged particles, at the 90% confidence level.

Original languageEnglish
Pages (from-to)2050-2055
Number of pages6
JournalAdvances in Space Research
Issue number12
Publication statusPublished - 2008
Externally publishedYes


  • BESS
  • Cosmic ray
  • Fractional charge
  • Quark search
  • Superconducting spectrometer

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences(all)


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