Search for rare hadronic B decays

R. Akers, G. Alexander, J. Allison, K. J. Anderson, S. Arcelli, S. Asai, A. Astbury, D. Axen, G. Azuelos, A. H. Ball, E. Barberio, R. J. Barlow, R. Bartoldus, J. R. Batley, G. Beaudoin, A. Beck, J. Becker, C. Beeston, T. Behnke, K. W. BellG. Bella, P. Bentkowski, S. Bentvelsen, P. Berlich, S. Bethke, O. Biebel, I. J. Bloodworth, P. Bock, H. M. Bosch, M. Boutemeur, S. Braibant, P. Bright-Thomas, R. M. Brown, A. Buijs, H. J. Burckhart, C. Burgard, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R. Carter, C. Y. Chang, C. Charlesworth, D. G. Charlton, S. L. Chu, P. E.L. Clarke, J. C. Clayton, S. G. Clowes, I. Cohen, J. E. Conboy, M. Coupland, M. Cuffiani, S. Dado, C. Dallapiccola, G. M. Dallavalle, C. Darling, S. De Jong, H. Deng, M. Dittmar, M. S. Dixit, E. do Couto e Silva, J. E. Duboscq, E. Duchovni, G. Duckeck, I. P. Duerdoth, U. C. Dunwoody, P. A. Elcombe, P. G. Estabrooks, E. Etzion, H. G. Evans, F. Fabbri, B. Fabbro, M. Fanti, M. Fierro, M. Fincke-Keeler, H. M. Fischer, P. Fischer, R. Folman, D. G. Fong, M. Foucher, H. Fukui, A. Fürtjes, P. Gagnon, A. Gaidot, J. W. Gary, J. Gascon, N. I. Geddes, C. Geich-Gimbel, S. W. Gensler, F. X. Gentit, T. Geralis, G. Giacomelli, P. Giacomelli, R. Giacomelli, V. Gibson, W. R. Gibson, J. D. Gillies, J. Goldberg, D. M. Gingrich, M. J. Goodrick, W. Gorn, C. Grandi, P. Grannis, E. Gross, J. Hagemann, G. G. Hanson, M. Hansroul, C. K. Hargrove, J. Hart, P. A. Hart, M. Hauschild, C. M. Hawkes, E. Heflin, R. J. Hemingway, G. Herten, R. D. Heuer, J. C. Hill, S. J. Hillier, T. Hilse, D. A. Hinshaw, P. R. Hobson, D. Hochman, A. Höcker, R. J. Homer, A. K. Honma, R. E. Hughes-Jones, R. Humbert, P. Igo-Kemenes, H. Ihssen, D. C. Imrie, A. Jawahery, P. W. Jeffreys, H. Jeremie, M. Jimack, M. Jones, R. W.L. Jones, P. Jovanovic, C. Jui, D. Karlen, K. Kawagoe, T. Kawamoto, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, B. King, J. King, S. Kluth, T. Kobayashi, M. Kobel, D. S. Koetke, T. P. Kokott, S. Komamiya, R. Kowalewski, R. Howard, P. Krieger, J. von Krogh, P. Kyberd, G. D. Lafferty, H. Lafoux, R. Lahmann, J. Lauber, J. G. Layter, P. Leblanc, P. Le Du, A. M. Lee, E. Lefebvre, M. H. Lehto, D. Lellouch, C. Leroy, J. Letts, L. Levinson, Z. Li, F. Liu, S. L. Lloyd, F. K. Loebinger, G. D. Long, B. Lorazo, M. J. Losty, X. C. Lou, J. Ludwig, A. Luig, M. Mannelli, S. marcellini, C. Markus, A. J. Martin, J. P. Martin, T. Mashimo, P. Mättig, U. Maur, J. McKenna, T. J. McMahon, A. I. McNab, J. R. McNutt, F. Meijers, F. S. Merritt, H. Mes, A. Michelini, R. P. Middleton, G. Mikenberg, J. Mildenberger, D. J. Miller, R. Mir, W. Mohr, C. Moisan, A. Montanari, T. Mori, M. Morii, U. Müller, B. Nellen, B. Nijjhar, S. W. O'Neale, F. G. Oakham, F. Odorici, H. O. Ogren, C. J. Oram, M. J. Oreglia, S. Orito, J. P. Pansart, G. N. Patrick, M. J. Pearce, P. Pfister, P. D. Phillips, J. E. Pilcher, J. Pinfold, D. Pitman, D. E. Plane, P. Poffenberger, B. Poli, A. Posthaus, T. W. Pritchard, H. Przysiezniak, M. W. Redmond, D. L. Rees, D. Rigby, M. Rison, S. A. Robins, D. Robinson, J. M. Roney, E. Ros, S. Rossberg, A. M. Rossi, M. Rosvick, P. Routenburg, Y. Rozen, K. Runge, O. Runolfsson, D. R. Rust, M. Sasaki, C. Sbarra, A. D. Schaile, O. Schaile, F. Scharf, P. Scharff-Hansen, P. Schenk, B. Schmitt, H. von der Schmitt, M. Schröder, H. C. Schultz-Coulon, P. Schütz, M. Schulz, C. Schwick, J. Schwiening, W. G. Scott, M. Settles, T. G. Shears, B. C. Shen, C. H. Shepherd-Themistocleous, P. Sherwood, G. P. Siroli, A. Skillman, A. Skuja, A. M. Smith, T. J. Smith, G. A. Snow, R. Sobie, R. W. Springer, M. Sproston, A. Stahl, C. Stegmann, K. Stephens, J. Steuerer, B. Stockhausen, R. Ströhmer, D. Strom, P. Szymanski, H. Takeda, T. Takeshita, S. Tarem, M. Tecchio, P. Teixeira-Dias, N. Tesch, M. A. Thomson, S. Towers, T. Tsukamoto, M. F. Turner-Watson, D. Van den plas, R. Van Kooten, G. Vasseur, M. Vincter, A. Wagner, D. L. Wagner, C. P. Ward, D. R. Ward, J. J. Ward, P. M. Watkins, A. T. Watson, N. K. Watson, P. Weber, P. S. Wells, N. Wermes, B. Wilkens, G. W. Wilson, J. A. Wilson, V. H. Winterer, T. Wlodek, G. Wolf, S. Wotton, T. R. Wyatt, A. Yeaman, G. Yekutieli, M. Yurko, W. Zeuner, G. T. Zorn

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9 Citations (Scopus)

Abstract

A search for rare decays of B hadrons has been performed using approximately two million hadronic Z0 decays collected by the OPAL experiment between 1990 and 1993. The exclusive decay channels Bd 0 → π+ π-, Bd 0 → K+π-, Bs 0 → π+K- and Bs 0 → K+K- have been studied. Such decays include contributions from flavour changing neutral current processes such as hadronic penguin decays. No significant excess of events has been observed in the π+π-, π+K- and K+K- invariant mass distributions. Consequently, upper limits on the Bd 0 branching ratios, Br(Bd 0→π+π-) < 4.7 × 10-5 and Br(Bd 0→K+π-) < 8.1 × 10-5, and on the Bs 0 branching ratios, Br(Bs 0→π+K-) < 2.6 × 10-4 and Br(Bs 0→K+K-) < 1.4 × 10-4, have been set at the 90% confidence level. These limits assume that the ratio of the partial decay widths of the Z0, λ (Z0 → bb̄)/λ(Z0 → hadrons), is 0.217 and that the fractions of Bd 0 and Bs 0 mesons produced during fragmentation are 39.5% and 12% respectively. The Bs 0 branching ratio limits are the first such limits obtained.

Original languageEnglish
Pages (from-to)393-404
Number of pages12
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume337
Issue number3-4
DOIs
Publication statusPublished - Oct 13 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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