First observation of the cabibbo suppressed decay B+ → D¯0 K+

M. Athanas, P. Avery, C. D. Jones, M. Lohner, S. Patton, C. Prescott, J. Yelton, J. Zheng, G. Brandenburg, R. A. Briere, A. Ershov, Y. S. Gao, D. Y J Kim, R. Wilson, H. Yamamoto, T. E. Browder, Y. Li, J. L. Rodriguez, T. Bergfeld, B. I. EisensteinJ. Ernst, G. E. Gladding, G. D. Gollin, R. M. Hans, E. Johnson, I. Karliner, M. A. Marsh, M. Palmer, M. Selen, J. J. Thaler, K. W. Edwards, A. Bellerive, R. Janicek, D. B. MacFarlane, P. M. Patel, A. J. Sadoff, R. Ammar, P. Baringer, A. Bean, D. Besson, D. Coppage, C. Darling, R. Davis, S. Kotov, I. Kravchenko, N. Kwak, L. Zhou, S. Anderson, Y. Kubota, S. J. Lee, J. J. O'Neill, R. Poling, T. Riehle, A. Smith, M. S. Alam, S. B. Athar, Z. Ling, A. H. Mahmood, S. Timm, F. Wappler, A. Anastassov, J. E. Duboscq, D. Fujino, K. K. Gan, T. Hart, K. Honscheid, H. Kagan, R. Kass, J. Lee, M. B. Spencer, M. Sung, A. Undrus, A. Wolf, M. M. Zoeller, B. Nemati, S. J. Richichi, W. R. Ross, H. Severini, P. Skubic, M. Bishai, J. Fast, J. W. Hinson, N. Menon, D. H. Miller, E. I. Shibata, I. P J Shipsey, M. Yurko, S. Glenn, Y. Kwon, B. A L Lyon, S. Roberts, E. H. Thorndike, C. P. Jessop, K. Lingel, H. Marsiske, M. L. Perl, V. Savinov, D. Ugolini

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Abstract

We have observed the decay B+ → D¯0 K+, using 3.3 × 106 BB¯ pairs collected with the CLEO II detector at the Cornell Electron Storage Ring. We find the ratio of branching fractions R ≡ B (B+ → D¯0 K+)/B (B+ → D¯0 π+) = 0.055 ± 0.014 ± 0.005.

Original languageEnglish (US)
Pages (from-to)5493-5497
Number of pages5
JournalPhysical review letters
Volume80
Issue number25
DOIs
StatePublished - 1998

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