Measurement Of The Form Factors For (B)Over-Bar(0)->D*(+)L(-)(Nu)Over-Bar

J. E. Duboscq,R. Fulton,D. Fujino,K. K. Gan,K. Honscheid,H. Kagan,R. Kass,J. Lee,M. Sung,C. White,R. Wanke,A. Wolf,M. M. Zoeller,X. Fu,B. Nemati,S. J. Richichi,W. R. Ross,P. Skubic,M. Wood,M. Bishai,J. Fast,E. Gerndt,J. W. Hinson,T. Miao,D. H. Miller,M. Modesitt,E. I. Shibata,I. P J Shipsey,P. N. Wang,L. Gibbons,S. D. Johnson,Y. Kwon,S. Roberts,E. H. Thorndike,C. P. Jessop,K. Lingel,H. Marsiske,M. L. Perl,S. F. Schaffner,R. Wang,T. E. Coan,J. Dominick,V. Fadeyev,I. Korolkov,M. Lambrecht,S. Sanghera,V. Shelkov,R. Stroynowski,I. Volobouev,G. Wei,M. Artuso,A. Efimov,M. Gao,M. Goldberg,D. He,N. Horwitz,S. Kopp,G. C. Moneti,R. Mountain,Y. Mukhin,S. Playfer,T. Skwarnicki,S. Stone,X. Xing,J. Bartelt,S. E. Csorna,V. Jain,S. Marka,D. Gibaut,K. Kinoshita,P. Pomianowski,S. Schrenk,B. Barish,M. Chadha,S. Chan,G. Eigen,J. S. Miller,C. O'Grady,M. Schmidtler,J. Urheim,A. J. Weinstein,F. Würthwein,D. M. Asner,M. Athanas,D. W. Bliss,W. S. Brower,G. Masek,H. P. Paar,J. Gronberg,C. M. Korte,R. Kutschke,S. Menary,R. J. Morrison,S. Nakanishi,H. N. Nelson,T. K. Nelson,C. Qiao,J. D. Richman,D. Roberts,A. Ryd,H. Tajima,M. S. Witherell,R. Balest,K. Cho,W. T. Ford,M. Lohner,H. Park,P. Rankin,J. Roy,J. G. Smith,J. P. Alexander,C. Bebek,B. E. Berger,K. Berkelman,K. Bloom,D. G. Cassel,H. A. Cho,D. M. Coffman,D. S. Crowcroft,M. Dickson,P. S. Drell,D. J. Dumas,R. Ehrlich,R. Elia,P. Gaidarev,B. Gittelman,S. W. Gray,D. L. Hartill,B. K. Heltsley,C. D. Jones,S. L. Jones,J. Kandaswamy,N. Katayama,P. C. Kim,D. L. Kreinick,T. Lee,Y. Liu,G. S. Ludwig,J. Masui,J. Mevissen,N. B. Mistry,C. R. Ng,E. Nordberg,J. R. Patterson,D. Peterson,D. Riley,A. Soffer,C. Ward,P. Avery,A. Freyberger,C. Prescott,S. Yang,J. Yelton,G. Brandenburg,R. A. Briere,D. Cinabro,T. Liu,M. Saulnier,R. Wilson,H. Yamamoto,T. E. Browder,F. Li,J. L. Rodriguez,T. Bergfeld,B. I. Eisenstein,J. Ernst,G. E. Gladding,G. D. Gollin,M. Palmer,M. Selen,J. J. Thaler,K. W. Edwards,K. W. McLean,M. Ogg,A. Bellerive,D. I. Britton,R. Janicek,D. B. MacFarlane,P. M. Patel,B. Spaan,A. J. Sadoff,R. Ammar,P. Baringer,A. Bean,D. Besson,D. Coppage,N. Copty,R. Davis,N. Hancock,S. Kotov,I. Kravchenko,N. Kwak,Y. Kubota,M. Lattery,J. K. Nelson,S. Patton,R. Poling,T. Riehle,V. Savinov,M. S. Alam,I. J. Kim,Z. Ling,A. H. Mahmood,J. J. O'Neill,H. Severini,C. R. Sun,S. Timm,F. Wappler

PHYSICAL REVIEW LETTERS（1996）

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摘要

Using a sample of 2.6 x 10(6) Upsilon(4S) --> B (B) over bar events collected with the CLE (O) over right arrow II detector at the Cornell Electron Storage Ring, we have measured the form factors for (B) over bar(0) --> D*(+)l(-)<(nu)over bar>. We perform a three-parameter fit with the joint distribution of four kinematic variables to obtain the form-factor ratios R(1) = 1.18 +/- 0.30 +/- 0.12 and R(2) = 0.71 +/- 0.22 +/- 0.07, and the form-factor slope rho(A1)(2) = 0.91 +/- 0.15 +/- 0.06, which is closely related to the slope of the Isgur-Wise function. The form-factor ratios are consistent with predicted corrections to the heavy-quark symmetry limit R(1) = R(2) = 1.

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