Measurement of the Branching Ratio for the Process b → τ − ν τ X The OPAL Collaboration

Giovanni Abbiendi, C. Ainsley, P. F. Åkesson,Gideon Alexander,John Allison,Georgios Anagnostou,Kelby Anderson,Silvia Arcelli,Shoji Asai, David Axen, Georges Azuelos,Ian Richard Bailey, Elisabetta Luigia Barberio, R. J. Barlow,Richard Batley, Ties Behnke, Ken W. Bell, P. J. Bell,Gideon Bella,Alain Bellerive, Siegfried Bethke,Otmar Biebel, Ian J Bloodworth, Oana Elena Vickey Boeriu, P. Bock, Jenny Böhme, Daniele Bonacorsi, Madjid Boutemeur, Sylvie Braibant, Luca Brigliadori, Raymond M. Brown, Helfried Burckhart, Jochen Cammin, Rebecca Carnegie, Bryan Caron, Antony Carter,Janet Carter, C. Y. Chang, D. G. Charlton, P. E. L. Clarke, Edmund W. Clay, I. Cohen, J. P. Couchman, A. Csilling,Marco Cuffiani,Shlomo Dado, G. M. Dallavalle, Steven Dallison, Albert De Roeck, Eddi A. De Wolf, Paul Dervan, Klaus Kurt Desch, Beatrix Dienes, Madhu Dixit, M M Donkers, Jörg Dubbert, Ehud Duchovni,Guenter Duckeck, I. P. Duerdoth, Erez Etzion, Federica Fabbri, Lutz Werner Feld,Pablo A. Ferrari, Franz Fiedler, Ivor Fleck, M. Ford, A. Frey, A. Fuertjes, David Futyan,Pauline Gagnon, John William Gary, Goetz Gaycken, Christoph Geich-Gimbel, G. A. Giacomelli, Paolo Giacomelli, Douglas Andrew Glenzinski, Jason Goldberg,Katie Leanne Graham,Eilam Gross, Jacob Grunhaus, Magali Gruwe, P. O. Guenther, Anik Gupta,Csaba Hajdu,M. Hamann, Gail G. Hanson, K. Harder, Amnon Harel, M. Harin-Dirac,Michael Hauschild, J. Hauschildt,Christopher Hawkes, Richard John Hawkings, Richard J. Hemingway, Carsten Hensel, Gregor Herten, R. D. Heuer, J. C. Hill, Kara Dion Hoffman, Roger J. Homer,David P. Horvath, Khondker R Hossain, Ralph W. Howard, Petra Huentemeyer, Peter Igo-Kemenes, Kazumasa Ishii, Abolhassan Jawahery, H. Jeremie, C. R. Jones, Predrag Jovanovi'c, T. R. Junk,Naoko Kanaya, Junichi Kanzaki, Gohar Karapetian,Douglas L. Karlen, Vakhtang Kartvelishvili, Kiyotomo Kawagoe,Tatsuo Kawamoto, Richard Keeler, R. G. Kellogg, B. W. Kennedy,Dong H. Kim,Katja Klein, Amit Klier, Stefan Kluth,Takashi Kobayashi, Michael Kobel, Th. Kokott,Sachio Komamiya, Robert Victor Kowalewski, T. Kraemer, Thomas H. Kress, Peter Williamson Krieger, J. von Krogh, D. Krop, Thorsten Kuhl, Michael Kupper, Paul Kyberd, George Lafferty, Hagar Yael Landsman, Dankfried Lanske,Ian T. Lawson, J. G. Layter, Axel Leins, Daniel Lellouch, James Robert Letts, Lorne Levinson, J. Lillich, Chris Littlewood,Stephen Lloyd, F. K. Loebinger, George Long, Michael J Losty,Jianke Lu, Jean Ludwig, Anna Macchiolo, Amy Macpherson, Wolfgang Mader,Stefano Marcellini, T. E. Marchant, Andre Martin, J. P. Martin,G. Martinez, Gianni Masetti, Tetsuro Mashimo, Peter Maettig, W.John McDonald,Ja Mckenna, Thomas J. Mcmahon, Robert McPherson,Frans Meijers, P. Mendez-Lorenzo, Wolfgang Menges, Frank S. Merritt, H. Mes, Aldo Michelini, S. Mihara, Giora Mikenberg,Danny Miller, Shulamit Moed,Wolfgang Mohr,Takehiro Mori, A. F. Mutter,Koichi Nagai, Ichizo Nakamura, Homer Neal, Richard Nisius,S. W. O'neale,Alexander Oh, A N Okpara, M. J. Oreglia, S. Orito,Christoph Pahl,Gabriella Pásztor, Joleen R. Pater, G. N. Patrick, James Pilcher, James L. Pinfold,David Plane, Bonnie Poli, Jaroslaw Polok,Oliver Pooth,Arnulf Quadt, Klaus Rabbertz, Ch. Rembser, Peter Renkel, Hartmut Rick, Nathan Lee Rodning, J. Michael Roney

semanticscholar（2001）

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摘要

The inclusive branching ratio for the process b → τ−ντX has been measured using hadronic Z decays collected by the OPAL experiment at LEP in the years 1992-2000. The result is: BR(b → τ−ντX) = (2.78 ± 0.18 ± 0.51)% This measurement is consistent with the Standard Model expectation and puts a constraint of tan β/M H < 0.53 GeV −1 at the 95% confidence level on Type II Two Higgs Doublet Models. (Submitted to Physics Letters B) The OPAL Collaboration G.Abbiendi, C.Ainsley, P.F. Åkesson, G.Alexander, J. Allison, G.Anagnostou, K.J.Anderson, S.Arcelli, S.Asai, D.Axen, G.Azuelos, I. Bailey, E. Barberio, R.J. Barlow, R.J. Batley, T.Behnke, K.W.Bell, P.J. Bell, G.Bella, A.Bellerive, S. Bethke, O.Biebel, I.J. Bloodworth, O.Boeriu, P. Bock, J. Böhme, D.Bonacorsi, M.Boutemeur, S. Braibant, L. Brigliadori, R.M.Brown, H.J. Burckhart, J. Cammin, R.K.Carnegie, B.Caron, A.A.Carter, J.R.Carter, C.Y.Chang, D.G.Charlton, P.E.L.Clarke, E.Clay, I. Cohen, J. Couchman, A.Csilling, M.Cuffiani, S.Dado, G.M.Dallavalle, S.Dallison, A.De Roeck, E.A.De Wolf, P.Dervan, K.Desch, B.Dienes, M.S.Dixit, M.Donkers, J.Dubbert, E.Duchovni, G.Duckeck, I.P.Duerdoth, E. Etzion, F. Fabbri, L. Feld, P. Ferrari, F. Fiedler, I. Fleck, M.Ford, A. Frey, A. Fürtjes, D.I. Futyan, P.Gagnon, J.W.Gary, G.Gaycken, C.Geich-Gimbel, G.Giacomelli, P.Giacomelli, D.Glenzinski, J.Goldberg, K.Graham, E.Gross, J.Grunhaus, M.Gruwé, P.O.Günther, A.Gupta, C.Hajdu, M.Hamann, G.G.Hanson, K.Harder, A.Harel, M.Harin-Dirac, M.Hauschild, J. Hauschildt, C.M.Hawkes, R.Hawkings, R.J.Hemingway, C.Hensel, G.Herten, R.D.Heuer, J.C.Hill, K.Hoffman, R.J.Homer, D.Horváth, K.R.Hossain, R.Howard, P.Hüntemeyer, P. Igo-Kemenes, K. Ishii, A. Jawahery, H. Jeremie, C.R. Jones, P. Jovanovic, T.R. Junk, N.Kanaya, J.Kanzaki, G.Karapetian, D.Karlen, V.Kartvelishvili, K.Kawagoe, T.Kawamoto, R.K.Keeler, R.G.Kellogg, B.W.Kennedy, D.H.Kim, K.Klein, A.Klier, S.Kluth, T.Kobayashi, M.Kobel, T.P.Kokott, S.Komamiya, R.V.Kowalewski, T.Krämer, T.Kress, P.Krieger, J. von Krogh, D.Krop, T.Kuhl, M.Kupper, P.Kyberd, G.D. Lafferty, H. Landsman, D. Lanske, I. Lawson, J.G. Layter, A. Leins, D. Lellouch, J. Letts, L. Levinson, J. Lillich, C. Littlewood, S.L. Lloyd, F.K. Loebinger, G.D. Long, M.J. Losty, J. Lu, J. Ludwig, A.Macchiolo, A.Macpherson, W.Mader, S.Marcellini, T.E.Marchant, A.J.Martin, J.P.Martin, G.Martinez, G.Masetti, T.Mashimo, P.Mättig, W.J.McDonald, J.McKenna, T.J.McMahon, R.A.McPherson, F.Meijers, P.Mendez-Lorenzo, W.Menges, F.S.Merritt, H.Mes, A.Michelini, S.Mihara, G.Mikenberg, D.J.Miller, S.Moed, W.Mohr, T.Mori, A.Mutter, K.Nagai, I. Nakamura, H.A.Neal, R.Nisius, S.W.O’Neale, A.Oh, A.Okpara, M.J.Oreglia, S.Orito, C. Pahl, G. Pásztor, J.R.Pater, G.N.Patrick, J.E. Pilcher, J. Pinfold, D.E.Plane, B. Poli, J. Polok, O. Pooth, A.Quadt, K.Rabbertz, C.Rembser, P.Renkel, H.Rick, N.Rodning, J.M.Roney,

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