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Brandenburg, G; Ershov, A; Wilson, R; Benslama, K; Eisenstein, B I; Ernst, J; Gollin, G D; Hans, R M; Karliner, I; Lowrey, N; Marsh, M A; Plager, C; Sedlack, C; Thaler, J J; Edwards, K W; Ammar, R; Besson, D; Zhao, X; Anderson, S; Frolov, V V; Kubota, Y; Lee, S J; Li, S Z; Poling, R; Smith, A; Stepaniak, C J; Alam, M S; Jian, L; Saleem, M; Wappler, F; Eckhart, E; Gwon, C; Hart, T; Honscheid, K; Hufnagel, D; Kass, R; Thayer, J B; Von Toerne, E; Wilksen, T; Zoeller, M M; Severini, H; Skubic, P; Dytman, S A; Savinov, V; Lee, J; Pavlunin, V; Shibata, E I; Shipsey, I P J; Park, C S; Park, W; Liu, F; Maravin, Y; Narsky, I; Stroynowski, R; Ye, J; Artuso, M; Boulahouache, C; Dambasuren, E; Mountain, R; Skwarnicki, T; Stone, S; Mahmood, A H; Danko, I; Xu, Z; Bonvicini, G; Cinabro, D; Dubrovin, M; McGee, S; Bornheim, A; Lipeles, E; Pappas, S P; Shapiro, A; Paar, H P; Briere, R A; Ferguson, T; Bebek, C; Berkelman, K; Blanc, F; Drell, P S; Ecklund, K M; Ehrlich, R; Gibbons, L; Hartill, D L; Heltsley, B K; Jones, C D; Kandaswamy, J; Kreinick, D L; Magerkurth, A; Mistry, N B; Patterson, J R; Peterson, D; Pivarski, J; Sadoff, A J; Shepherd, M R; Thayer, J G; Urner, D; Weinberger, M; Athar, S B; Avery, P; Stoeck, H
Physical review letters, 2002-Nov-25, 20021125, Letnik: 89, Številka: 22Journal Article
Using 13.53 fb(-1) of CLEO data, we have measured the ratios of the branching fractions R(+)(e),R(+)(mu) and the combined branching fraction ratio R(+)(l), defined by R(+)(l)=B(D+-->K(*0)l(+)nu(l))/B(D+-->K-pi(+)pi(+)). We find R(+)(e)=0.74+/-0.04+/-0.05, R(+)(mu)=0.72+/-0.10+/-0.05, 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-pi(+)pi(+)) leads to B(D+-->K(*0)e(+)nu(e))=(6.7+/-0.4+/-0.5+/-0.4)%, B(D+-->K(*0)mu(+)nu(mu))=(6.5+/-0.9+/-0.5+/-0.4)%, and B(D+-->K(*0)l(+)nu(l))=(6.7+/-0.4+/-0.5+/-0.4)%, where the third error is due to the uncertainty in B(D+-->K-pi(+)pi(+)).
