Measurement Of B(D-S(+)->Mu(+)Nu(Mu))/B(D-S(+)->Phi Mu(+)Nu(Mu)) And Determination Of The Decay Constant F(D-S)

Keiji Kodama,S Torikai,N Ushida,A Mokhtarani,V Paolone,J T Volk,J O Wilcox,P M Yager,R M Edelstein,A Freyberger,D B Gibaut,R Lipton,W R Nichols,Douglas M Potter,J Russ,Chunjie Zhang, Yanyan Zhang,H I Jang,Jin Young Kim,B Baller,R J Stefanski,K Nakazawa,S H Chung,Moon Soo Park,I G Park,J S Song,C S Yoon,M Aryal,N W Reay,R A Sidwell,N R Stanton,Satoshi Yoshida,M Chikawa,Takahiro Hara, Satoshi Aoki,Katsumi Hoshino,Motomasa Kobayashi,Masaaki Komatsu,M Miyanishi,Masakazu Nakamura,S Nakanishi,Ken Niwa, Masatoshi Nomura,K Okada,H Tajima,K Teraoka,J M Dunlea,S G Frederiksen, S Kuramata,B Lundberg, G A Oleynik,K Reibel,G Kalbfleisch, P Skubic,J Snow,S Willis,Katsumi Nakamura,T Okusawa,Tsuyoshi Yoshida,Hidetoshi Okabe,Jun Yokota, Norihiro Ihara,M Kazuno, Toshiyuki Koya,E Niu,Satoshi Ogawa,H Shibuya,Sachiro Watanabe,Naoki Yasuda, Kazumasa Ehara,K Horie,Yuichi Sato,Koji Suzuki,I Tezuka

PHYSICS LETTERS B（1996）

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摘要

We have observed 23.2 +/- 6.0(-0.9)(+1.0) purely-leptonic decays of D-s(+) --> mu(+)nu(mu) from a sample of muonic one prong decay events detected in the emulsion target of Fermilab experiment E653. Using the D-s(+) --> phi mu(+)nu(mu) yield measured previously in this experiment, we obtain B(D-s(+) --> mu(+)nu(mu))/B(D-s(+) --> phi mu(+)nu(mu)) = 0.16 +/- 0.06 +/- 0.03 In addition, we extract the decay constant f(Ds) = 194 +/- 35 +/- 20 +/- 14 MeV.

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