Measurement of the form factors for B¯0 → D*+lν¯

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. BishaiJ. 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, Y. Kubota, R. Poling, CLEO Collaboration

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Using a sample of 2.6 × 106ϒ(4S) → BB¯ events collected with the CLEO II detector at the Cornell Electron Storage Ring, we have measured the form factors for B¯0 → D*+lν¯. We perform a three-parameter fit with the joint distribution of four kinematic variables to obtain the form-factor ratios R1 = 1.18 ± 0.30 ± 0.12 and R2 = 0.71 ± 0.22 ± 0.07, and the form-factor slope ρ2 A1 = 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 R1 = R2 = 1.

Original languageEnglish (US)
Pages (from-to)3898-3902
Number of pages5
JournalPhysical review letters
Issue number21
StatePublished - May 20 1996


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