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. 2002 Nov 25;89(22):222001.
doi: 10.1103/PhysRevLett.89.222001. Epub 2002 Nov 11.

Measurement of B(D+-->K(*0)l(+)nu(l))

G Brandenburg  1 , 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; CLEO
Affiliations

Measurement of B(D+-->K(*0)l(+)nu(l))

G Brandenburg et al. Phys Rev Lett. .

Abstract

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(+)).

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