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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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 Jul 15

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    Kodama, K., ushida, N., Mokhtarani, A., Paolone, V. S., Volk, J. T., Wilcox, J. O., Yager, P. M., Edelstein, R. M., Freyberger, A. P., Gibaut, D. B., Lipton, R. J., Nichols, W. R., Potter, D. M., Russ, J. S., Zhang, C., Zhang, Y., Jang, H. I., Kim, J. Y., Kim, T. I., ... Kim, S. K. (1993). A study of the semimuonic decays of the DS. Physics Letters B, 309(3-4), 483-491. https://doi.org/10.1016/0370-2693(93)90965-K