CLEO 02-02 Measurement of the D + → ¯ K ∗0 l + νl Branching Fraction CLEO Collaboration

G. Brandenburg, A. Ershov,D. Y.-J. Kim, R. Wilson,K. Benslama,B. I. Eisenstein, J. Ernst,G. D. Gollin,R. M. Hans, I. Karliner, N. Lowrey,M. A. Marsh, C. Plager, C. Sedlack, M. Selen,J. J. Thaler, J. Williams,K. W. Edwards, R. Ammar, D. Besson, X. Zhao, S. Anderson,V. V. Frolov,Y. Kubota,S. J. Lee, S. Z. Li,R. Poling, A. Smith, C. J. Stepaniak, J. Urheim, S. Ahmed,M. S. Alam, L. Jian, M. Saleem, F. Wappler, E. Eckhart,K. K. Gan, C. Gwon,T. Hart, K. Honscheid, D. Hufnagel,H. Kagan, R. Kass,T. K. Pedlar, J. B. Thayer,E. von Toerne, T. Wilksen,M. M. Zoeller,S. J. Richichi, H. Severini, P. Skubic,S. A. Dytman, S. Nam, V. Savinov, S. Chen,J. W. Hinson,J. Lee,D. H. Miller, V. Pavlunin,E. I. Shibata, I. P. J. Shipsey, D. Cronin-Hennessy,A. L. Lyon, C. S. Park, W. Park,E. H. Thorndike,T. E. Coan,Y. S. Gao, F. Liu, Y. Maravin, I. Narsky, R. Stroynowski,J. Ye, M. Artuso, C. Boulahouache, K. Bukin, E. Dambasuren, R. Mountain, T. Skwarnicki, S. Stone,J. C. Wang,A. H. Mahmood,S. E. Csorna, I. Danko,Z. Xu, G. Bonvicini,D. Cinabro, M. Dubrovin, S. McGee,A. Bornheim, E. Lipeles,S. P. Pappas, A. Shapiro,W. M. Sun,A. J. Weinstein, G. Masek,H. P. Paar, R. Mahapatra,R. A. Briere,G. P. Chen, T. Ferguson, G. Tatishvili, H. Vogel, N. E. Adam, J. P. Alexander, C. Bebek, K. Berkelman, F. Blanc, V. Boisvert,D. G. Cassel, P. S. Drell,J. E. Duboscq,K. M. Ecklund, R. Ehrlich, L. Gibbons, B. Gittelman,S. W. Gray,D. L. Hartill,B. K. Heltsley, L. Hsu,C. D. Jones, J. Kandaswamy,D. L. Kreinick, A. Magerkurth, H. Mahlke-Krüger,T. O. Meyer,N. B. Mistry, E. Nordberg, M. Palmer,J. R. Patterson, D. Peterson, J. Pivarski, D. Riley,A. J. Sadoff, H. Schwarthoff,M. R. Shepherd, J. G. Thayer, D. Urner, B. Valant-Spaight, G. Viehhauser, A. Warburton, M. Weinberger,S. B. Athar, P. Avery, H. Stoeck, J. Yelton

semanticscholar(2002)

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摘要
Using 13.53 fb−1 of CLEO data, we have measured the ratios of the branching fractions R+ e = B(D→K̄eνe) B(D+→K−π+π+) , R + μ = B(D→K̄μνμ) B(D+→K−π+π+) and the combined branching fraction ratio R l = B(D→K̄lνl) B(D+→K−π+π+) . We find R + e = 0.74 ± 0.04 ± 0.05, R+ μ = 0.72 ± 0.10 ± 0.06 and R + l = 0.74 ± 0.04 ± 0.05, where the first and second errors are statistical and systematic, respectively. The known branching fraction B(D+ → K−π+π+) leads to: B(D+ → K̄eνe) = (6.7± 0.4±0.5±0.4)%, B(D+ → K̄μνμ) = (6.5±0.9±0.5±0.4)% and B(D + → K̄lνl) = (6.7 ± 0.4 ± 0.5 ± 0.4)%, where the third error is due to the uncertainty in B(D+ → K−π+π+).
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