A study of the semimuonic decays of the DS

K. Kodama, N. ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. S. Russ, C. Zhang, Y. Zhang, H. I. Jang, J. Y. Kim, T. I. Kim, I. T. LimM. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, K. S. Chung, S. H. Chung, D. C. Kim, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, M. Chikawa, T. Abe, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S. D. Chang, B. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, M. Nomura, H. Tajima, S. Yoshida, M. Aryal, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, G. R. Kalbfleisch, P. Skubic, J. M. Snow, S. E. Willis, O. Kusumoto, K. Nakamura, S. Ohashi, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, H. Yuuki, H. Okabe, J. Yokota, M. Adachi, I. Ikegami, M. Kazuno, E. Niu, H. Shibuya, S. Watanabe, Y. Sato, M. Seshimo, I. Tezuka, S. Y. Bahk, S. K. Kim

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30 Citations (Scopus)


We present a study of the Cabibbo-allowed semimuonic decay modes of the DS+ produced in 600 GeV c π- -emulsion interactions. From a signal of 18.7±4.9-0.7+0.4 events in the DS+ → øμ+υ channel, the product of production cross section and partial width is measured with respect to that for D+ → K*0 μ+υ to be ( σ(DS+) σ(D+)). (Λ(DS+ → øμ+ν)Λ(D+ → K*0 μ+ν)) = 0.56 ± 0.14 ± 0.12. The form factor ratios in the decay, obtained by fitting to the decay angles and q2, are A2 (0) 1(0) = 2.1-0.5+0.6 ± 0.2 and V (0) A1 (0) = 2.3-0.9+1.1 ± 0.4, where A1 (0) and A2 (0) are the axial vector form factors and V(0) is the vector form factor, evaluated at q2 = 0. The first observation of DS+ → (ημ+υ + η'μ+υ) is also reported, and Γ (DS+ → (ημ+υ + η'μ+υ)) Γ (DS+ → øμ+υ) is determined to be 3.9 ± 1.6.

Original languageEnglish
Pages (from-to)483-491
Number of pages9
JournalPhysics Letters B
Issue number3-4
Publication statusPublished - 1993 Jul 15
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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