Study Of The Semileptonic Charm Decays D-0 ->Pi(-)L(+)Nu And D-0 -> K(-)L(+)Nu

G. S. Huang,D. H. Miller, V. Pavlunin,B. Sanghi,E. I. Shibata,I. P. J. Shipsey, G. S. Adams,M. Chasse,J. P. Cummings,I. Danko,J. Napolitano,D. Cronin-Hennessy, W. Park,J. B. Thayer,E. H. Thorndike,T. E. Coan, Y. S. Gao,F. Liu,R. Stroynowski,M. Artuso, C. Boulahouache,S. Blusk, J. Butt,E. Dambasuren,O. Dorjkhaidav,N. Menaa,H. Muramatsu,R. Nandakumar, R. Redjimi,R. Sia,T. Skwarnicki,S. Stone,J. C. Wang,K. Zhang, A. H. Mahmood,S. E. Csorna,G. Bonvicini,D. Cinabro, M. Dubrovin,A. Bornheim, E. Lipeles,S. P. Pappas, A. J. Weinstein, 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,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,J. R. Patterson,T. K. Pedlar, D. Peterson,J. Pivarski, D. Riley,J. L. Rosner, A. Ryd,A. J. Sadoff,H. Schwarthoff,M. R. Shepherd,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, B. I. Eisenstein,G. D. Gollin,I. Karliner,D. Kim, N. Lowrey,P. Naik,C. Sedlack,M. Selen,J. J. Thaler,J. Williams

PHYSICAL REVIEW LETTERS（2005）

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摘要

We investigate the decays D-0-->pi(-)l(+)nu and D-0-->K(-)l(+)nu, where l is e or mu, using approximately 7 fb(-1) of data collected with the CLEO III detector. We find R-0=B(D-0-->pi(-)e(+)nu)/B(D-0-->K(-)e(+)nu)=0.082+/-0.006+/-0.005. Fits to the kinematic distributions of the data provide parameters describing the form factor of each mode. Combining the form factor results and R-0 gives |f(+)(pi)(0)|(2)|V-cd|(2)/|f(+)(K)(0)|(2)|V-cs|(2)=0.038(-0.007-0.003)(+0.006+0.005).

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关键词

form factor,data collection

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