Measurements of the branching fractions and helicity amplitudes in B→D*ρ decays

S. E. Csorna,I. Danko,G. Bonvicini,D. Cinabro, M. Dubrovin,S. McGee,A. Bornheim, E. Lipeles,S. P. Pappas,A. Shapiro, W. M. Sun, A. J. Weinstein, R. A. Briere,G. P. Chen,T. Ferguson,G. Tatishvili,H. Vogel,N. E. Adam,J. P. Alexander,K. Berkelman, V. Boisvert, D. G. Cassel, P. S. Drell, J. E. Duboscq,K. M. Ecklund,R. Ehrlich, R. S. Galik, 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-Kruger,T. O. Meyer,N. B. Mistry, J. R. Patterson, D. Peterson,J. Pivarski,S. J. Richichi, D. Riley,A. J. Sadoff,H. Schwarthoff,M. R. Shepherd,J. G. Thayer,D. Urner,T. Wilksen,A. Warburton,M. Weinberger,S. B. Athar, P. Avery,L. Breva-Newell,V. Potlia,H. Stoeck, J. Yelton,K. Benslama, B. I. Eisenstein,G. D. Gollin, I. Karliner, N. Lowrey,C. Plager,C. Sedlack,M. Selen,J. J. Thaler,J. Williams, K. W. Edwards, D. Besson,X. Zhao,S. Anderson,V. V. Frolov, D. T. Gong,Y. Kubota, S. Li, R. Poling,A. Smith,C. Stepaniak,J. Urheim,Z. Metreveli,K. Seth, A. Tomaradze,P. Zweber,S. Ahmed,M. Alam, J. Ernst, L. Jian,M. Saleem,F. Wappler,K. Arms,E. Eckhart,K. Gan, C. Gwon,K. Honscheid,D. Hufnagel, H. Kagan, R. Kass,T. Pedlar,E. von Toerne, M. Zoeller, H. Severini, P. Skubic,S. Dytman, J. Mueller,S. Nam, V. Savinov,J. Hinson,J. Lee,D. Miller, V. Pavlunin,B. Sanghi, E. Shibata, I. Shipsey, D. Cronin-Hennessy,A. Lyon, C. Park, W. Park,J. Thayer,E. Thorndike,T. Coan, Y. Gao, F. Liu, Y. Maravin, R. Stroynowski,M. Artuso, C. Boulahouache,S. Blusk,K. Bukin,E. Dambasuren,R. Mountain,H. Muramatsu,R. Nandakumar, T. Skwarnicki,S. Stone, J. Wang,A. Mahmood

Physical Review D（2003）

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摘要

Using 9.1 fb(-1) of e(+)e(-) data collected at the Y(4S) with the CLEO detector using the Cornell Electron Storage Ring, measurements are reported for both the branching fractions and the helicity amplitudes for the decays B--->D(*0)rho(-) and (B) over bar (0)-->D(*+)rho(-). The fraction of longitudinal polarization in (B) over bar (0)-->D(*+)rho(-) is found to be consistent with that in (B) over bar (0)-->D(*+)l(-)(nu) over bar at q(2)=M-rho(2), indicating that the factorization approximation works well. The longitudinal polarization in the B- mode is similar. The measurements also show evidence of nontrivial final-state interaction phases for the helicity amplitudes.

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