Lifetimes of the charmed particles D, F, and c+ produced by neutrinos

N. Ushida, T. Kondo, S. Tasaka, I. G. Park, J. S. Song, T. Hara, Y. Homma, Y. Tsuzuki, G. Fujioka, H. Fukushima, Y. Takahashi, S. Tatsumi, C. Yokoyama, K. Fujiwara, K. Taruma, S. Y. Bahk, C. O. Kim, J. N. Park, D. C. Bailey, S. ConettiP. Mercure, J. Trischuk, M. Turcotte, S. Aoki, K. Chiba, H. Fuchi, K. Hoshino, K. Kodama, R. Matsui, M. Miyanishi, M. Nakamura, K. Nakazawa, K. Niu, K. Niwa, M. Ohashi, H. Sasaki, Y. Tomita, N. Torii, O. Yamakawa, Y. Yanagisawa, G. J. Aubrecht, J. Dunlea, S. Errede, A. Gauthier, M. J. Gutzwiller, S. Kuramata, G. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, O. Kusumoto, Y. Noguchi, T. Okusawa, M. Teranaka, J. Yamato, H. Okabe, J. Yokota, S. G. Frederiksen, C. J.D. Hebert, J. Hebert, B. McLeod, M. Kazuno, H. Shibuya, I. A. Lovatt, J. F. Martin, D. Pitman, J. D. Prentice, B. J. Stacey, T. S. Yoon, Y. Maeda

Research output: Contribution to journalArticlepeer-review


We report final results for the D, F, and c+ lifetimes measured with a hybrid emulsion spectrometer in the wide-band neutrino beam at Fermilab. In total, 3886 neutrino and antineutrino interactions were located in the fiducial volume of the emulsion. From these interactions we have unambiguously identified 6 F and 13 c+ decays, for which the fitted lifetimes are (F)=(2.6-0.9+1.6) ×10-13 s and (c+)=(2.0-0.5+0.7)×10-13 s. 28 other decays are consistent with a D+ or D- hypothesis. From these events, we obtain a D lifetime of (11.1-2.9+4.4) × 10-13s.

Original languageEnglish (US)
Pages (from-to)1767-1770
Number of pages4
JournalPhysical review letters
Issue number17
StatePublished - 1986
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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