Measuring B(D+→μ+ν) and the pseudoscalar decay constant fD+

G. Bonvicini,D. Cinabro,M. Dubrovin,A. Bornheim,S. P. Pappas, A. J. Weinstein,J. L. Rosner, R. A. Briere,G. P. Chen,T. Ferguson,G. Tatishvili,H. Vogel,M. E. Watkins,N. E. Adam,J. P. Alexander,K. Berkelman,D. G. Cassel,V. Crede, J. E. Duboscq,K. M. Ecklund,R. Ehrlich,R. S. Galik, L. Gibbons,B. Gittelman,R. Gray,S. W. Gray,D. L. Hartill,B. K. Heltsley,D. Hertz,L. Hsu, C. D. Jones,J. Kandaswamy,D. L. Kreinick,V. E. Kuznetsov,H. Mahlke-Kruger,T. O. Meyer,P. U. E. Onyisi, J. R. Patterson, D. Peterson,J. Pivarski, D. Riley, A. Ryd,A. J. Sadoff,H. Schwarthoff,M. R. Shepherd,S. Stroiney, W. M. Sun,J. G. Thayer,D. Urner,T. Wilksen,M. Weinberger,S. B. Athar, P. Avery,L. Breva-Newell,R. Patel,V. Potlia,H. Stoeck, J. Yelton, P. Rubin,C. Cawlfield, B. I. Eisenstein,G. D. Gollin, I. Karliner,D. Kim, N. Lowrey,P. Naik, C. Sedlack,M. Selen,J. J. Thaler,J. Williams,J. Wiss, K. W. Edwards, D. Besson,T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao,B. Lang, S. Li,R. Poling,A. Scott,A. Smith,C. Stepaniak,S. Dobbs,Z. Metreveli,K. Seth, A. Tomaradze,P. Zweber, J. Ernst,A. Mahmood, H. Severini,D. Asner,S. Dytman,W. Love,S. Mehrabyan, J. Mueller, V. Savinov,Z. Li,A. Lopez,H. Mendez,J. Ramirez, G. Huang,D. Miller, V. Pavlunin,B. Sanghi, E. Shibata, I. Shipsey,G. Adams,M. Chasse,M. Cravey,J. Cummings,I. Danko,J. Napolitano, C. Park, W. Park,J. Thayer,E. Thorndike,T. Coan, Y. Gao, F. Liu,M. Artuso, C. Boulahouache,S. Blusk,J. Butt,E. Dambasuren,O. Dorjkhaidav, J. Li,N. Menaa,R. Mountain,H. Muramatsu,R. Nandakumar, R. Redjimi,R. Sia, T. Skwarnicki,S. Stone, J. Wang, K. Zhang, S. Csorna

PHYSICAL REVIEW D（2004）

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摘要

In 60 pb(-1) of data taken on the psi(3770) resonance with the CLEO-c detector, we find eight D+-->mu(+)nu decay candidates that are mostly signal, containing only one estimated background. Using this statistically compelling sample, we measure a value of B(D+-->mu(+)nu)=(3.5+/-1.4+/-0.6)x10(-4), and determine f(D)(+)=(202+/-41+/-17) MeV.

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