Measurement Of The Relative Branching Fraction Gamma(D0-]K-Mu-V)Gamma(D0-]Mu-X)

K. Kodama,N. Ushida,A. Mokhtarani,V. Paolone, J. Volk,J. Wilcox,P. Yager,R. Edelstein,A. Freyberger, D. Gibaut, R. Lipton,W. Nichols,D. Potter,J. Russ,Y. Zhang,H. Jang,J. Kim,I. Lim,M. Pac,B. Baller,R. Stefanski,K. Nakazawa, S. Tasaka,Y. Choi,K. Chung,D. Kim,I. Park,J. Song,C. Yoon,M. Chikawa,T. Abe,T. Fujii,G. Fujioka,K. Fujiwara,H. Fukushima,T. Hara,Y. Takahashi,K. Taruma,Y. Tsuzuki,C. Yokoyama, S. Chang,B. Cheon,J. Cho,J. Kang,C. Kim,K. Kim,T. Kim,J. Lee,S. Lee,G. Lim,S. Nam,T. Shin,K. Sim, J. 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,H. Tajima,J. Dunlea,S. Frederiksen,S. Kuramata,B. Lundberg,G. Oleynik,N. Reay,K. Reibel,R. Sidwell,N. Stanton,K. Moriyama,H. Shibata,T. Jaffery,G. Kalbfleisch, P. Skubic,J. Snow,S. Willis, W. Yuan,O. Kusumoto,T. Okusawa,M. Teranaka,T. Tominaga,T. Watanabe,J. Yamato,H. Okabe,J. Yokota,M. Adachi,M. Kazuno,F. Minakawa,E. Niu,H. Shibuya,S. Watanabe,O. Fukuda,Y. Sato,I. Tezuka,S. Bahk, S. Kim

PHYSICAL REVIEW LETTERS（1991）

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摘要

The fraction f of D0 semimuonic decays which occur through the K-mu-v mode has been measured in a hybrid emulsion spectrometer. Analysis of 124 semimuonic D0-decay candidates gives f = 0.32 +/- 0.05(stat) +/- 0.05(syst). From this measurement and existing data on the D0 semileptonic branching ratio and lifetime, we obtain the branching ratio R(D0 --> K- mu+v) = (2.4 +/- 0.4 +/- 0.5)% and partial decay rate-GAMMA(D0 --> K- mu+v) = (5.6 +/- 0.9 +/- 1.2) x 10(10) s-1.

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decay rate

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