First measurement of Γ(Ds+→μ+ν)Γ(Ds+→φπ+)

D. Acosta,M. Athanas,G. Masek, H. Paar,A. Bean, J. Gronberg,R. Kutschke,S. Menary,R. Morrison,S. Nakanishi,H. Nelson,T. Nelson,J. Richman,A. Ryd,H. Tajima,D. Schmidt, D. Sperka,M. Witherell,M. Procario,S. Yang,R. Balest,K. Cho,M. Daoudi,W. Ford,D. Johnson,K. Lingel,M. Lohner,P. Rankin,J. Smith, J. Alexander,C. Bebek,K. Berkelman, D. Besson,T. Browder,D. Cassel,H. Cho,D. Coffman, P. Drell,R. Ehrlich,R. Galik,M. Garcia-Sciveres,B. Geiser,B. Gittelman,S. Gray,D. Hartill, B. Heltsley,C. Jones,S. Jones,J. Kandaswamy,N. Katayama,P. Kim,D. Kreinick,G. Ludwig,J. Masui,J. Mevissen,N. Mistry,C. Ng, E. Nordberg,M. Ogg,J. Patterson, D. Peterson,D. Riley,S. Salman,M. Sapper,H. Worden, F. Würthwein,P. Avery,A. Freyberger,J. Rodriguez,R. Stephens, J. Yelton,D. Cinabro,S. Henderson,K. Kinoshita,T. Liu,M. Saulnier,F. Shen,R. Wilson,H. Yamamoto,B. Ong,M. Selen, A. Sadoff,R. Ammar,S. Ball,P. Baringer,D. Coppage,N. Copty,R. Davis,N. Hancock,M. Kelly,N. Kwak,H. Lam,Y. Kubota, M. Lattery,J. Nelson,S. Patton,D. Perticone,R. Poling, V. Savinov,S. Schrenk,R. Wang,M. Alam,I. Kim,B. Nemati,J. O'Neill, H. Severini,C. Sun, M. Zoeller,G. Crawford,C. Daubenmier,R. Fulton,D. Fujino,K. Gan,K. Honscheid,H. Kagan, R. Kass,J. Lee,R. Malchow,F. Morrow,Y. Skovpen,M. Sung,C. White, J. Whitmore,P. Wilson,F. Butler,X. Fu,G. Kalbfleisch,M. Lambrecht,W. Ross, P. Skubic, J. Snow, P. Wang,M. Wood, D. Bortoletto,D. Brown,J. Fast,R. McIlwain, T. Miao,D. Miller,M. Modesitt,S. Schaffner, E. Shibata,I. Shipsey, P. Wang,M. Battle,J. Ernst, H. Kroha,S. Roberts,K. Sparks,E. Thorndike, C. Wang,J. Dominick,S. Sanghera,V. Shelkov, T. Skwarnicki, R. Stroynowski, I. Volobouev,P. Zadorozhny,M. Artuso,D. He,M. Goldberg,N. Horwitz, R. Kennett,G. Moneti, F. Muheim, Y. Mukhin,S. Playfer, Y. Rozen, S. Stone,M. Thulasidas, G. Vasseur,G. Zhu, J. Bartelt, S. Csorna,Z. Egyed,V. Jain, P. Sheldon,D. Akerib,B. Barish,M. Chadha,S. Chan,D. Cowen,G. Eigen,J. Miller,C. O'Grady,J. Urheim,A. Weinstein

PHYSICAL REVIEW D(1994)

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摘要
We present a measurement of GAMMA(D(s)+ --> mu+nu)/GAMMA(D(s)+ --> phipi+) = 0.245 +/- 0.052 +/- 0.074. Using this ratio and B(D(s)+ --> phipi+)=(3.7 +/- 0.9)% we extract f(Ds)=344 +/- 37 +/- 52 +/-42 MeV, where the last error is due to the uncertainty in the D(s)+ --> phipi+ absolute branching ratio. This result is larger than most theoretical predictions.
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