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

*Corresponding author for this work

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31 Scopus citations

Abstract

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
Volume309
Issue number3-4
DOIs
StatePublished - 1993/07/15

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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