Measurement Of The Absolute Branching Fraction Of D-S(+)-> Tau(+)Nu(Tau) Decay

K. M. Ecklund,W. Love, V. Savinov,A. Lopez,H. Mendez,J. Ramirez,J. Y. Ge,D. H. Miller, I. P. J. Shipsey,B. Xin,G. S. Adams,M. Anderson,J. P. Cummings,I. Danko,D. Hu,J. Napolitano,J. Insler,H. Muramatsu,E. H. Thorndike, F. Yang,M. Artuso,S. Blusk, S. Khalil,J. Li,S. Nisar, K. Randrianarivony,N. Sultana, T. Skwarnicki,S. Stone,J. C. Wang,L. M. Zhang,G. Bonvicini,D. Cinabro, M. Dubrovin,A. Lincoln, J. Rademacker,D. M. Asner, K. W. Edwards,P. Naik,J. Reed, R. A. Briere,T. Ferguson,G. Tatishvili,H. Vogel,M. E. Watkins,J. L. Rosner, D. G. Cassel,J. E. Duboscq, L. Gibbons,R. Gray,S. W. Gray,D. L. Hartill, B. K. Heltsley,D. Hertz,C. D. Jones,J. Kandaswamy,D. L. Kreinick,V. E. Kuznetsov, H. Mahlke-Kruger, D. Mohapatra,J. R. Patterson, D. Peterson, D. Riley, A. Ryd,A. J. Sadoff,S. Stroiney, W. M. Sun,T. Wilksen,S. B. Athar, R. Patel, J. Yelton,P. Rubin, B. I. Eisenstein, I. Karliner,S. Mehrabyan, N. Lowrey,M. Selen,E. J. White,J. Wiss,R. E. Mitchell, D. Besson,T. K. Pedlar,D. Cronin-Hennessy,K. Y. Gao,J. Hietala,Y. Kubota,T. Klein,B. W. Lang,R. Poling,A. W. Scott,P. Zweber,S. Dobbs,Z. Metreveli,K. K. Seth, A. Tomaradze,J. Libby,A. Powell, G. Wilkinson,R. Poling,A. Scott,P. Zweber,S. Dobbs, Z. Metreveli,K. Seth, A. Tomaradze,J. Libby,A. Powell, G. Wilkinson

PHYSICAL REVIEW LETTERS（2008）

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摘要

Using a sample of tagged D-s(+) decays collected near the (DsDs -/+)-D-*+/- peak production energy in e(+)e(-) collisions with the CLEO-c detector, we study the leptonic decay D-s(+)->tau(+)nu(tau) via the decay channel tau(+)-> e(+)nu(e)(nu) over bar (tau). We measure B(D-s(+)->tau(+)nu(tau))=(6.17 +/- 0.71 +/- 0.34)%, where the first error is statistical and the second systematic. Combining this result with our measurements of D-s(+)->mu(+)nu(mu) and D-s(+)->tau(+)nu(tau) (via tau(+)->pi(+)(nu) over bar (tau)), we determine f(Ds)=(274 +/- 10 +/- 5) MeV.

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multidisciplinary,physics

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