Author: "G. Beaudoin" / Publisher: elsevier bv - Searchworks@Jio Institute Digital Library Search Results

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1. Updated measurement of the τ lifetime

Author: R. Van Kooten, D. Pitman, M. H. Lehto, E. Lefebvre, S. L. Chu, T. G. Shears, F. Odorici, F. Liu, Margret Fincke-Keeler, D. M. Gingrich, G. Giacomelli, B. C. Shen, P. Schenk, P. Berlich, Siegfried Bethke, T. Hilse, A. K. Honma, B. Nijjhar, W. G. Scott, H. M. Fischer, M. S. Dixit, O. Runolfsson, J. Mildenberger, Gideon Bella, Frans Meijers, H. J. Burckhart, Gordon H. Hanson, Jacqueline Batley, C. M. Hawkes, Daniel Lellouch, A. Michelini, C. Beeston, M. Fanti, James Pinfold, Claudio Grandi, R. D. Heuer, M. J. Losty, Fabrizio Fabbri, P. Pfister, D. Van den plas, D. R. Rust, Takehiko Mori, P. Igo-Kemenes, F. S. Merritt, M. Yurko, D. G. Fong, M. W. Redmond, A. M. Lee, G. Beaudoin, J. Gascon, W. R. Gibson, H. Jeremie, H. von der Schmitt, P. W. Jeffreys, S. W. O'Neale, P. E.L. Clarke, U. C. Dunwoody, M. K. Jones, Xinchou Lou, S. A. Robins, H. Mes, R. E. Hughes-Jones, U. Maur, J. Steuerer, R.J. Akers, I. P. Duerdoth, A. Beck, E. Heflin, K. J. Anderson, J. P. Martin, J. W. Gary, M. J. Oreglia, Matthias Schröder, R. M. Brown, A. Höcker, Lorne Levinson, R. Lahmann, Silvia Arcelli, P. D. Phillips, J. A. McKenna, Tohru Takeshita, D. C. Imrie, P. Bright-Thomas, B. Stockhausen, Paul Kyberd, F. K. Loebinger, S. De Jong, Marcello Mannelli, J. E. Duboscq, Shlomo Dado, Sachio Komamiya, P. Poffenberger, E. do Couto e Silva, Georges Azuelos, Barry King, Peter Fischer, J. J. Ward, P. Scharff-Hansen, E. Barberio, Theodoros Geralis, D. A. Hinshaw, D. E. Plane, O. Schaile, K. W. Bell, E. Ros, A. T. Watson, Erez Etzion, G. P. Siroli, J. King, P. Schütz, M. A. Thomson, J. C. Hill, I. J. Bloodworth, P. Bentkowski, R. Bartoldus, C. Moisan, G. A. Beck, Marco Cuffiani, A. M. Smith, Christoph Schwick, G. M. Dallavalle, Achim Stahl, J. R. Carter, H. O. Ogren, Christoph Geich-Gimbel, Misao Sasaki, Stefan Kluth, Shlomit Tarem, G. N. Patrick, P. Teixeira-Dias, P. Le Du, B. Fabbro, M. Settles, G. Vasseur, B. Lorazo, Otmar Biebel, R. Giacomelli, T. Behnke, S. Rossberg, C. J. Oram, D. G. Charlton, D. L. Wagner, Kiyotomo Kawagoe, T. P. Kokott, A. Luig, Andris Skuja, Yoram Rozen, J. G. Layter, M. Foucher, Stephen Lloyd, G. D. Long, C. Y. Chang, B. Schmitt, H. Deng, R. Humbert, M. Tecchio, Tetsuro Mashimo, R. P. Middleton, C. Charlesworth, A. I. McNab, F. X. Gentit, J. E. Conboy, G. W. Wilson, A. Fürtjes, Michael Kobel, J. Goldberg, P. Weber, Gregor Herten, A. M. Rossi, H. Przysiezniak, D. Axen, A. Jawahery, Giora Mikenberg, D. Karlen, B. Nellen, W. Gorn, S. G. Clowes, C. Burgard, D. Hochman, P. A. Hart, B. Wilkens, P. Leblanc, T. Tsukamoto, Ehud Duchovni, Paolo Giacomelli, M. Hansroul, M. Fierro, H. Lafoux, T. J. Smith, K. Stephens, Peter Sherwood, M. Jimack, Z. Li, Norbert Wermes, Sherry Towers, Hans-Christian Schultz-Coulon, T. Kawamoto, A. Buijs, J. R. McNutt, M. J. Pearce, D. M. Strom, H. Ihssen, R. W. Springer, Alexander Wagner, J. Hagemann, C. H. Shepherd-Themistocleous, H. G. Evans, J. Ludwig, J. E. Pilcher, C. Dallapiccolla, S. W. Gensler, M. J. Goodrick, K. Runge, P. Bock, I. Cohen, John Allison, C. Darling, S. Orito, M. F. Turner-Watson, M. Morii, M. Rosvick, S. J. Hillier, R. J. Homer, T. Kobayashi, Randall Sobie, Peter R Hobson, S. Braibant, Gunter Wolf, M. Hauschild, P. Gagnon, C. Stegmann, N. I. Geddes, Michael Schulz, G. D. Lafferty, P. Routenburg, V. Gibson, R. Ströhmer, C. Markus, P. Mättig, Shoji Asai, G. T. Zorn, A. Astbury, U. Müller, S. Wotton, B. Poli, H. M. Bosch, R. Kowalewski, A. J. Martin, Wolfram Dietrich Zeuner, H. Fukui, A. Yeaman, P. D. Grannis, Gideon Alexander, J. M. Roney, R. G. Kellogg, Paolo Capiluppi, D. R. Ward, G. A. Snow, C. K. Hargrove, C. P. Ward, D. L. Rees, D. S. Koetke, J. C. Clayton, Stefano Marcellini, T. W. Pritchard, James Letts, Madjid Boutemeur, P. S. Wells, Guenter Duckeck, Terry Richard Wyatt, P. G. Estabrooks, R. K. Keeler, M. Coupland, P. M. Watkins, R. Howard, Claude Leroy, J. P. Pansart, V. H. Winterer, P. Szymanski, C. Jui, Stan Bentvelsen, C. Sbarra, Michael Dittmar, G. Yekutieli, A. A. Carter, Ron Folman, Roger Jones, M. G. Rison, T. J. McMahon, J. Schwiening, R. K. Carnegie, J. A. Wilson, J. von Krogh, J. Hart, Dave Robinson, J. D. Gillies, R. J. Barlow, D. J. Miller, D. Rigby, R. J. Hemingway, B. W. Kennedy, P. Jovanovic, Austin Ball, Peter Krieger, N. K. Watson, Manuella Vincter, Alessandro Montanari, R. Mir, J. Lauber, H. Takeda, F. G. Oakham, W. Mohr, A. Posthaus, P. A. Elcombe, J. Becker, F. Scharf, A. D. Schaile, A. Skillman, E. K. U. Gross, A. Gaidot, T. Wlodek, M. Sproston, and N. Tesch
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, High Energy Physics::Experiment, Particle Physics - Experiment, Charged particle, Lepton
Abstract: We present an update of our measurement of the τ lepton lifetime, using data taken during 1992 and 1993 with the OPAL detector at LEP. The lifetime is determined from analyses of the impact parameters of tracks from τ decays to a single charged particle, and the reconstructed decay lenghts from the τ decays to three charged particles. With the added statistics (which increase the τ pair event sample size by more than a factor of four over our 1990 and 1991 data sample), the updated lifetime measurement is: ττ = 288.8 ± 2.2 (stat) ± 1.4 (sys) fs. When combined with world-average measurements of the tau leptonic branching fractions (assuming e-μ universality), the ratio of charged-current couplings is: ( g τ g μ ) = 1.005 ± 0.007 , in agreement with the hypothesis of τ-μ charged-current universality.
Published: 1994

2. Measurement of the time dependence of mixing using a jet charge technique

Author: W. R. Gibson, A. Beck, E. Heflin, P. S. Wells, R. M. Brown, Lorne Levinson, C. Y. Chang, M. F. Turner, James Pinfold, Terry Richard Wyatt, G. Beaudoin, D. G. Fong, R. Bartoldus, B. W. Kennedy, E. Torrente-Lujan, J. Gascon, H. von der Schmitt, N. K. Watson, Michael Kobel, Gregor Herten, M. Coupland, John Allison, Shlomo Dado, R. G. Kellogg, D. S. Koetke, Stefano Marcellini, James Letts, H. O. Ogren, C. Wahl, C. Sbarra, B. Wilkens, Christoph Geich-Gimbel, H. Lafoux, Paul Kyberd, Paolo Giacomelli, F. K. Loebinger, Otmar Biebel, M. Hansroul, N. J. Tresilian, A. Rollnik, R. Giacomelli, Michael Dittmar, R. J. Hemingway, J. W. Gary, G. E. Richards, Georges Azuelos, D. G. Charlton, D. L. Wagner, T. J. Smith, K. Stephens, G. Yekutieli, J. Kroll, R. D. Heuer, Marcello Mannelli, J. E. Duboscq, Fabrizio Fabbri, D. Van den plas, J. E. Pilcher, F. C. Grant, K. W. Bell, W. Mohr, J. Mildenberger, Giora Mikenberg, Harold Nguyen, F. X. Gentit, J. E. Conboy, A. Fürtjes, R. Van Kooten, D. Pitman, P. Jovanovic, M. W. Redmond, J. R. McNutt, A. A. Carter, Ron Folman, Roger Jones, H. Deng, R. Humbert, Kiyotomo Kawagoe, M. H. Lehto, T. G. Shears, P. Poffenberger, Gideon Bella, H. J. Burckhart, Jacqueline Batley, J. C. Hill, Misao Sasaki, H. Przysiezniak, Austin Ball, M. Fierro, G. G. Hanson, A. Buijs, D. M. Strom, C. Stegmann, S. L. Chu, I. J. Bloodworth, P. Scharff-Hansen, D. M. Gingrich, P. A. Elcombe, B. C. Shen, D. A. Hinshaw, C. H. Shepherd-Themistocleous, Manuella Vincter, Alessandro Montanari, P. Schütz, M. G. Rison, E. Lefebvre, R. J. Homer, D. E. Plane, H. Fukui, T. Hilse, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, G. D. Lafferty, Siegfried Bethke, G. Giacomelli, J. Hart, F. S. Merritt, P. Berlich, M. Hauschild, A. K. Honma, A. M. Smith, F. Odorici, C. Dallapiccola, W. G. Scott, O. Runolfsson, P. Bentkowski, Sherry Towers, T. Kawamoto, T. J. McMahon, T. W. Pritchard, J. D. Gillies, G. M. Dallavalle, G. A. Snow, C. P. Ward, J. Becker, A. D. Schaile, G. Vasseur, B. Lorazo, C. Markus, D. R. Rust, P. Paschievici, V. Gibson, D. L. Rees, Xinchou Lou, Z. Li, J. Schwiening, G. Quast, C. Beeston, R. K. Carnegie, F. Scharf, P. Schenk, P. Weber, Claudio Grandi, M. Settles, C. Moisan, J. A. McKenna, G. J. VanDalen, G. A. Beck, P. F. Harrison, Andris Skuja, Achim Stahl, T. Behnke, M. Yurko, Guenter Duckeck, P. W. Jeffreys, M. J. Losty, J. A. Wilson, R. J. Barlow, S. Orito, M. Rosvick, D. J.P. Dumas, D. J. Miller, A. M. Lee, P. Teixeira-Dias, Stephen Lloyd, G. D. Long, M. S. Dixit, R. Mir, Tetsuro Mashimo, Frans Meijers, P. Bright-Thomas, A. Skillman, R.J. Akers, J. J. Ward, M. Tecchio, M. A. Thomson, A. Gaidot, D. R. Ward, P. Le Du, B. Fabbro, H. Mes, I. P. Duerdoth, T. Wlodek, M. Sproston, B. Schmitt, M. Morii, M. Foucher, D. Axen, C. Jui, P. E.L. Clarke, A. Jawahery, O. Schaile, R. Howard, M. K. Jones, J. Lauber, S. W. O'Neale, Margret Fincke-Keeler, A. M. Rossi, Peter R Hobson, Claude Leroy, S. Barnett, N. Wermes, W. Gorn, J. P. Pansart, J. P. Martin, N. Tesch, K. J. Anderson, D. Hochman, H. Takeda, V. H. Winterer, M. J. Oreglia, Peter Sherwood, R. W. Springer, Alexander Wagner, F. G. Oakham, T. Tsukamoto, P. Pfister, J. Hagemann, J. Ludwig, K. Runge, P. Bock, J. C. Clayton, J. R. Carter, G. N. Patrick, S. De Jong, P. Routenburg, J. Goldberg, J. von Krogh, B. Nellen, P. M. Hattersley, P. Leblanc, J. Steuerer, R. Ströhmer, N. I. Geddes, H. G. Evans, Dave Robinson, M. J. Goodrick, I. Cohen, G. T. Zorn, R. Lahmann, Gunter Wolf, L. A. del Pozo, B. Boden, B. Poli, D. C. Imrie, G. W. Wilson, H. M. Bosch, Wolfram Dietrich Zeuner, S. Wotton, R. Yaari, Madjid Boutemeur, Marco Cuffiani, H. M. Fischer, J. G. Layter, G. P. Siroli, J. King, Christoph Schwick, P. G. Estabrooks, Erez Etzion, R. K. Keeler, A. Yeaman, A. Michelini, Stefan Kluth, Shlomit Tarem, D. Karlen, C. Charlesworth, S. Rossberg, C. J. Oram, C. Burgard, R. P. Middleton, S. A. Robins, P. M. Watkins, Sachio Komamiya, Theodoros Geralis, E. Ros, A. T. Watson, Silvia Arcelli, T. P. Kokott, A. Luig, J. M. Roney, C. Darling, P. A. Hart, P. Igo-Kemenes, H. Jeremie, R. E. Hughes-Jones, U. Maur, P. Mättig, Shoji Asai, E. do Couto e Silva, M. J. Pearce, C. M. Hawkes, M. Cooper, Daniel Lellouch, Takehiko Mori, Ehud Duchovni, M. Jimack, H. Ihssen, S. W. Gensler, S. J. Hillier, T. Kobayashi, Matthias Schröder, R. Kowalewski, Gideon Alexander, Paolo Capiluppi, A. Astbury, U. Müller, A. J. Martin, and C. K. Hargrove
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Jet (fluid), Particle decay, Particle physics, Meson, Oscillation, Electron–positron annihilation, High Energy Physics::Experiment, Charge (physics), Electric charge, Lepton
Abstract: The observation and measurement of the time-dependence of B0d↔B0d mixing are described. The B0d meson is reconstructed in final states that contain a D∗− and an l+, where the b flavour of the B0d at decay time is tagged by the electric charge of the lepton. A new and efficient method, using a jet charge technique, is developed for identifying the b flavour of the produced B0d. From a sample of 556 D∗±l∓ candidates reconstructed in the OPAL data collected during 1990–1993, the B0d↔B0d oscillation frequency is measured to be Δmd = 0.508 ± 0.075 (stat) ±0.025(syst) ps−1 giving an oscillation parameter of χd = 0.73 ± 0.11 (stat) ±0.08 (syst), where 0.076 of the systematic error on χd arises from the uncertainty on the B0d lifetime.
Published: 1994

3. Measurement of the τ− → h− π0ντ and τ− → h− ⩾ 2π0ντ branching ratios

Author: John Allison, M. Hauschild, R. G. Kellogg, K. Stephens, C. Markus, D. S. Koetke, Otmar Biebel, G. E. Richards, D. G. Charlton, D. L. Wagner, P. Pfister, Stefano Marcellini, James Letts, S. Wotton, I. J. Bloodworth, Paul Kyberd, F. K. Loebinger, H. Deng, R. Humbert, P R Poffenberger, A. Rollnik, N. J. Tresilian, R. Giacomelli, Madjid Boutemeur, J. Mildenberger, Harold Nguyen, Gordon H. Hanson, S. Bethke, M. W. Redmond, D. C. Imrie, M. Settles, P. G. Estabrooks, R. D. Heuer, R. Ströhmer, P. Igo-Kemenes, Matthias Schröder, H. Przysiezniak, Fabrizio Fabbri, J. M. Roney, M. Foucher, D. Van den plas, M. Fierro, H. M. Fischer, P. M. Watkins, G. T. Zorn, V. Gibson, A. Michelini, Norbert Wermes, Sherry Towers, T. Kawamoto, D. G. Fong, S. L. Chu, P. Schütz, C. Darling, C. Moisan, G. A. Beck, G. W. Wilson, T. Wlodek, H. Jeremie, R. E. Hughes-Jones, Achim Stahl, H. M. Bosch, E. Duchovni, D. Karlen, S. Orito, Gregor Herten, Wolfram Dietrich Zeuner, Erez Etzion, R. Van Kooten, D. Pitman, P. Teixeira-Dias, M. H. Lehto, G. Giacomelli, J. Gascon, U. Maur, G. Yekutieli, Silvia Arcelli, T. Hilse, W. R. Gibson, P. Le Du, B. Fabbro, C. Wahl, B. Wilkens, Stefan Kluth, Shlomit Tarem, O. Runolfsson, D. Hochman, C. Y. Chang, Georges Azuelos, H. O. Ogren, P. M. Hattersley, P. Schenk, J. Steuerr, M. F. Turner, J. Pinfold, A. Beck, S. Wolf, B. Schmitt, J. E. Pilcher, K. W. Bell, T. J. Smith, T. G. Shears, S. A. Robins, S. Rossberg, C. J. Oram, Michael Kobel, D. A. Hinshaw, E. Heflin, C. Beeston, M. S. Dixit, Gideon Bella, Claudio Grandi, Frans Meijers, P. Bright-Thomas, R. M. Brown, E. do Couto e Silva, J. C. Hill, P. Mättig, Kiyotomo Kawagoe, H. Mes, I. P. Duerdoth, R. P. Middleton, M. J. Oreglia, H. J. Burckhart, R.J. Akers, M. Yurko, Jacqueline Batley, Misao Sasaki, H. Lafoux, P. A. Hart, D. R. Ward, G. A. Snow, C. P. Ward, J. W. Gary, C. M. Hawkes, M. Cooper, J. Goldberg, B. W. Kennedy, P. W. Jeffreys, B. Nellen, E. Torrente-Lujan, A. P. Wagner, Takehiko Mori, P. E.L. Clarke, P. Paschievici, A. M. Lee, B. C. Shen, Marcello Mannelli, J. E. Duboscq, O. Schaile, R. Yaari, D. L. Rees, M. K. Jones, A. K. Honma, M. J. Pearce, P. Leblanc, Paolo Giacomelli, R. Howard, M. Hansroul, P. Berlich, W. G. Scott, P. Weber, J. P. Martin, G. Beaudoin, J. R. Carter, G. N. Patrick, C. Burgard, C. H. Shepherd-Themistocleous, D. Axen, S. De Jong, S. W. O'Neale, K. J. Anderson, H. G. Evans, M. J. Goodrick, I. Cohen, J. J. Ward, M. A. Thomson, A. Jawahery, R. J. Homer, J. C. Clayton, Xinchou Lou, R. Mir, Shlomo Dado, D. R. Rust, R. Kowalewski, A. Astbury, D. M. Gingrich, R. Lahmann, Peter Sherwood, U. Müller, R. W. Springer, M. J. Losty, P. Scharff-Hansen, Hans-Christian Schultz-Coulon, A. J. Martin, J. Hagemann, J. Ludwig, Michael Schulz, G. D. Lafferty, K. Runge, P. Bock, T. Behnke, G. Quast, G. P. Siroli, J. King, Christoph Schwick, Marco Cuffiani, E. Lefebvre, T. W. Pritchard, L. Levinson, F. Odorici, Z. Li, C. K. Hargrove, Guenter Duckeck, P. S. Wells, A. M. Smith, G. Vasseur, D. Lellouch, Gideon Alexander, Paolo Capiluppi, G. Mikenberg, J. G. Layter, B. Lorazo, A. M. Rossi, D. E. Plane, Terry Richard Wyatt, Andris Skuja, M. Rosvick, T. Tsukamoto, V. H. Winterer, P. Bentkowski, C. Charlesworth, G. D. Long, G. M. Dallavalle, M. Coupland, Tetsuro Mashimo, S. Barnett, W. Gorn, N. I. Geddes, D. J.P. Dumas, Richard Keeler, P. F. Harrison, B. Boden, B. Poli, Stephen Lloyd, M. Tecchio, C. Jui, A. D. Schaile, J. R. McNutt, Claude Leroy, J. P. Pansart, F. C. Grant, M. Jimack, H. Ihssen, A. Buijs, S. W. Gensler, D. M. Strom, C. Stegmann, S. J. Hillier, T. Kobayashi, A. Syoosi, F. S. Merritt, J. Lauber, H. Takeda, F. G. Oakham, J. A. McKenna, J. Hart, C. Dallapiccola, R. Bartoldus, J. D. Gillies, Christoph Geich-Gimbel, R. J. Barlow, J. Kroll, D. J. Miller, F. X. Gentit, J. E. Conboy, A. Fürtjes, R. J. Hemingway, P. Jovanovic, Sachio Komamiya, Austin Ball, Theodoros Geralis, E. Ros, A. T. Watson, T. P. Kokott, A. Luig, Manuella Vincter, Alessandro Montanari, C. Sbarra, Michael Dittmar, A. Yeaman, A. A. Carter, Ron Folman, Roger Jones, M. Morii, Peter R Hobson, M. G. Rison, J. von Krogh, Dave Robinson, L. A. del Pozo, T. J. McMahon, J. Schwiening, H. von der Scmitt, R. K. Carnegie, J. A. Wilson, M. Fincke-Keeler, N. K. Watson, W. Mohr, A. Skillman, A. Gaidot, M. Sproston, P. Routenburg, N. Tesch, P. A. Elcombe, J. Becker, F. Scharf, G. J. VanDalen, and R. Sobie
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle decay, Branching fraction, Electron–positron annihilation, Analytical chemistry, Branching (polymer chemistry), Selection criterion
Abstract: The branching ratios of the τ− → h− π0vτ and τ− → h− ⩾ 2π0vτ decays (where h− is either a π− or K−) are measured using the OPAL detector at LEP. The two branching ratios are simultaneously measured using separate selection criteria and are found to be Bh− π0 = (26.25 ± 0.35 ± 0.52)%, Bh− ⩾ 2π0 = (9.89 ± 0.34 ± 0.55)%Bh− π0 + Bh− ⩾ 2π0 = (36.14 ± 0.33 ± 0.58)%, where the first error is statistical and the second is systematic.
Published: 1994

4. Measurement of the B0 and B+ lifetimes

Author: W. R. Gibson, A. Beck, E. Heflin, R. M. Brown, G. Transtromer, B. W. Kennedy, E. Torrente-Lujan, M. Fincke-Keeler, D. E. Plane, P. Bentkowski, Alan Watson, D. J.P. Dumas, Silvia Arcelli, Tara Shears, P. Igo-Kemenes, G. Maringer, R. Sobie, H. Jeremie, R. E. Hughes-Jones, U. Maur, P. Bright-Thomas, Horst Breuker, H. M. Fischer, E. do Couto e Silva, J. Pinfold, C. Burgard, F. C. Grant, P. E.L. Clarke, M. A. Whalley, A. Michelini, A. C. Janissen, O. Ganel, G. A. Snow, C. P. Ward, R. Yaari, H. O. Ogren, Christoph Geich-Gimbel, A. Simon, D. L. Rees, A. Buijs, M. Jobes, Otmar Biebel, G. E. Richards, U. Binder, D. G. Charlton, D. L. Wagner, P. G. Estabrooks, N. Paz-Jaoshvili, P. Scharff-Hansen, J. Kroll, G. Yekutieli, F. X. Gentit, H. Deng, R. Humbert, J. E. Conboy, P. M. Watkins, G. Beaudoin, D. R. Rust, A. Pouladdej, Paul Kyberd, F. K. Loebinger, B. C. Shen, C. Schwick, A. M. Smith, F. S. Merritt, J. Steuerer, D. Strom, G. Vasseur, B. Lorazo, Kiyotomo Kawagoe, A. Astbury, M. W. Redmond, W. G. Scott, Richard Keeler, Norbert Wermes, T. Kawamoto, G. M. Dallavale, N. I. Geddes, A. J. Martin, J. A. McKenna, Shlomo Dado, A. Rollnik, R. Giacomelli, F. G. Oakham, D. Hochman, C. Y. Chang, M. F. Turner, M. Morii, S. Bethke, P. Taras, Peter R Hobson, R. Kowalewski, B. Boden, Marco Cuffiani, Mitsuaki Nozaki, R. F. McGowan, Claude Leroy, D. G. Fong, J. P. Pansart, B. Poli, J. Gascon, J. Hart, S. Orito, P. Weber, S. Tarem, T. Behnke, Sachio Komamiya, E. Ros, X. C. Lou, H. von der Schmitt, M. J. Losty, M. Jimack, H. Ihssen, John Allison, G. Quast, C. K. Hargrove, S. L. Chu, J. R. McNutt, J. D. Gillies, Gideon Bella, P. Pfister, R. Mir, S. W. Gensler, T. P. Kokott, Carla Sbarra, T. Hilse, J. Banks, J. W. Gary, H. J. Burckhart, Jacqueline Batley, T. Mouthuy, S. J. Hillier, P. Paschievici, T. Kobayashi, C. J. Virtue, N. J. Tresilian, P. S. Wells, Terry Richard Wyatt, Marcello Mannelli, J. E. Duboscq, R. D. Heuer, R. G. Kellogg, J. von Krogh, O. Runolfsson, Andris Skuja, Fabrizio Fabbri, M. Coupland, R. J. Barlow, D. Van den plas, G. T. Zorn, O. Schaile, S. Barnett, D. J. Miller, D. S. Koetke, A. D. Schaile, John Hobbs, Tetsuro Mashimo, Dave Robinson, Stefano Marcellini, T. Wlodek, Tohru Takeshita, M. H. Lehto, L. A. del Pozo, James Letts, N. J. Thackray, V. H. Winterer, A. M. Rossi, T. Tsukamoto, S. Levegrün, K. Stephens, Michael Dittmar, F. Lamarche, Claudio Grandi, Georges Azuelos, P. F. Harrison, W. Gorn, M. J. Oreglia, A. Yeaman, J. Mildenberger, Harold Nguyen, R. J. Hemingway, M. A. Thomson, J. F. Kral, K. W. Bell, G. A. Bahan, D. Pitman, A. A. Carter, P. Singh, N. K. Watson, Stephen Lloyd, P. M. Hattersley, Max Weber, M. Tecchio, C. Moisan, J. P. Walker, R. Van Kooten, V. Gibson, P. Berlich, P. Jovanovic, A. Gaidot, M. Sproston, L. Köpke, W. J. Collins, M. Hauschild, J. C. Hill, Misao Sasaki, G. A. Beck, J. R. Carter, Austin Ball, R. W. L. Jones, G. N. Patrick, John Baines, G. D. Lafferty, P. Poffenberger, R. Lahmann, D. Menszner, P. Teixeira-Dias, Phillip Allport, S. W. O'Neale, B. Panzer-Steindel, S. Schreiber, P. Routenburg, C. Markus, C. J. Oram, N. Tesch, A. Dieckmann, Alessandro Montanari, T. W. Pritchard, T. J. McMahon, K. J. Anderson, G. P. Siroli, J. Schwiening, D. R. Ward, J. P. Martin, R. K. Carnegie, P. A. Elcombe, J. Hagemann, D. C. Imrie, H. Przysiezniak, B. Schmitt, J. C. Clayton, J. A. Wilson, S. De Jong, M. Fierro, M. Yurko, M. Rosvick, J. Becker, W. Schappert, A. Wagner, P. W. Jeffreys, A. M. Lee, C. Wahl, G. J. VanDalen, L. Levinson, R. Shypit, M. Hansroul, C. Jui, J. E. Pilcher, D. Lellouch, C. H. Shepherd-Themistocleous, R. J. Homer, J. M. Lorah, W. Mohr, Gideon Alexander, Paolo Capiluppi, D. A. Hinshaw, D. Axen, A. Jawahery, G. Tysarczyk-Niemeyer, Peter Sherwood, R. W. Springer, J. Ludwig, K. Runge, P. Bock, G. Duckeck, R. Ströhmer, F. Odorici, H. M. Bosch, Wolfram Dietrich Zeuner, G. Mikenberg, H. Mes, I. P. Duerdoth, M. Kwano, J. M. Roney, I. J. Bloodworth, M. Settles, M. Foucher, G. W. Wilson, D. Karlen, A. K. Honma, T. J. Smith, P. Mättig, C. M. Hawkes, M. Cooper, Takehiko Mori, P. D. Acton, E. Duchovni, Erez Etzion, Stefan Kluth, S. Rossberg, J. G. Layter, R. P. Middleton, S. Wotton, G. G. Hanson, J. Goldberg, B. Nellen, P. Leblanc, G. Giacomelli, H. G. Evans, M. J. Goodrick, I. Cohen, P. Schenk, M. S. Dixit, and Frans Meijers
Subjects: Nuclear physics, Physics, Hadronic decay, Nuclear and High Energy Physics, Meson, Silicon, chemistry, Electron–positron annihilation, Hadron, chemistry.chemical_element, Particle Physics - Experiment
Abstract: From a data sample of approximately 240 000 hadronic Z 0 decays recorded during 1991 a sample of about 130 semileptonic B hadron decays containing a D 0 , D + or D ∗+ has been isolated. Using silicon microvertex detector information the decay vertices in these events have been reconstructed. The average B hadron lifetime of the mix of B hadrons in this event sample is measured to be 1.51 −0.14 +0.16 ±0.11 ps. From the distribution of decay times in the different samples the lifetimes of the B 0 and B + mesons are determined to be 1.51 −0.23−0.14 +0.24+0.12 ps and 1.51 −0.28−0.14 +0.30+0.12 ps, respectively. The measured ratio of the B + to B 0 lifetimes of 1.00 −0.25 +0.33 ±0.08 supports expectations that the lifetimes are similar.
Published: 1993

5. Evidence for chain-like production of strange baryon pairs in jets

Author: T. P. Kokott, G. Tysarczyk-Niemeyer, F. X. Gentit, A. Beck, C. Markus, S. Komamiya, W. R. Gibson, G. G. Hanson, S. Dado, John Hobbs, A. M. Lee, F. Odorici, G. A. Snow, C. P. Ward, T. Hilse, J. Schwiening, F. S. Merritt, T. Mashimo, G. W. Wilson, H. O. Ogren, D. L. Rees, K. Stephens, D. Pitman, A. Dieckmann, J. E. Conboy, J. Kroll, S. Bethke, Tara Shears, R. M. Brown, R. J. Hemingway, S. Rossberg, H. Jeremie, Andris Skuja, S. Barnett, J. A. McKenna, H. M. Fischer, M. W. Redmond, W. Mohr, Frans Meijers, Peter R Hobson, G. Duckeck, P. Routenburg, E. Heflin, P. E.L. Clarke, A. Simon, C. Wahl, F. G. Oakham, J. Letts, G. Quast, E. Duchovni, A. Wagner, M. Morii, T. Mori, Horst Breuker, P. A. Elcombe, B. Lorazo, Otmar Biebel, G. N. Patrick, E. do Couto e Silva, M. Cooper, T. Mouthuy, J. Ludwig, A. Yeaman, J. Pinfold, P. M. Watkins, D. C. Imrie, S. Tarem, A. Gaidot, D. Menszner, M. Hansroul, H. G. Evans, T. J. McMahon, P. Weber, D. G. Charlton, D. L. Wagner, M. J. Goodrick, S. De Jong, S. Levegrün, J. Hart, Tohru Takeshita, P. Sherwood, H. M. Bosch, F. Lamarche, M. Yurko, P. Mättig, D. Hochman, W. J. Collins, P. Pfister, H. Przysiezniak, H. Deng, Harold Nguyen, N. K. Watson, P. Bentkowski, J. P. Martin, J. D. Gillies, C. Moisan, G. T. Zorn, M. Jimack, B. Panzer-Steindel, C. Jui, Richard Keeler, G. Beaudoin, T. J. Smith, M. Sasaki, P. Berlich, X. C. Lou, R. Humbert, J. Mildenberger, D. E. Plane, C. Y. Chang, S. Marcellini, J. F. Kral, G. P. Siroli, D. R. Rust, J. C. Clayton, N. Paz-Jaoshvili, P. G. Estabrooks, K. J. Anderson, P. Poffenberger, I. Cohen, C. M. Hawkes, A. Pouladdej, R. E. Hughes-Jones, M. Coupland, C. Burgard, V. Gibson, John Baines, P. Bock, O. Runolfsson, E. Ros, G. Giacomelli, Gideon Bella, J. Hagemann, R. K. Carnegie, C. Leroy, A. C. Janissen, N. I. Geddes, G. Yekutieli, G. Transtromer, M. Kuwano, U. Binder, B. C. Shen, R. Lahmann, W. Schappert, J. C. Hill, H. J. Burckhart, A. Michelini, B. Poli, Carla Sbarra, A. Jawahery, J. P. Pansart, J. R. McNutt, E. Etzion, J. Becker, U. Maur, M. Fierro, T. W. Pritchard, John Allison, R. G. Kellogg, D. S. Koetke, R. W.L. Jones, R. W. Springer, D. R. Ward, B. Boden, P. W. Jeffreys, M. F. Turner, R. Yaari, Mitsuaki Nozaki, B. W. Kennedy, S. Arcelli, V. H. Winterer, G. M. Dallavalle, S. L. Chu, P. Igo-Kemenes, J. von Krogh, P. F. Harrison, H. Mes, Dave Robinson, G. Azuelos, L. A. del Pozo, G. A. Bahan, M. Hauschild, Alan Watson, P. Kyberd, P. D. Acton, R. F. McGowan, C. K. Hargrove, J. A. Wilson, W. G. Scott, A. Rollnik, M. J. Losty, J. M. Lorah, M. Sproston, A. M. Rossi, M. Jobes, G. D. Lafferty, A. J. Martin, P. Leblanc, D. Lellouch, I. P. Duerdoth, C. H. Shepherd-Themistocleous, H. Ihssen, F. K. Loebinger, M. A. Thomson, J. G. Layter, R. Kowalewski, S. Wotton, R. Ströhmer, L. Levinson, M. Rosvick, G. Alexander, P.P. Singh, F. C. Grant, W. Gorn, P. Bright-Thomas, A. Buijs, Kiyotomo Kawagoe, D. M. Strom, C. Grandi, Tatsuo Kawamoto, O. Schaile, S. Schreiber, R. Giacomelli, K. Runge, N. J. Tresilian, B. Nellen, R. Van Kooten, D. J. Miller, M. Dittmar, J. Steuerer, T. Kobayashi, M. Fincke-Keeler, D. Karlen, J. Goldberg, D. Axen, P. Paschievici, A. K. Honma, C. J. Oram, O. Ganel, G. Vasseur, M. Weber, R. Mir, M. Settles, M. Foucher, M. J. Oreglia, T. Wlodek, P. Schenk, J. E. Pilcher, Wolfram Dietrich Zeuner, G. Maringer, N. J. Thackray, M. H. Lehto, G. J. VanDalen, E. Torrente-Lujan, Roger Barlow, M. Cuffiani, G. A. Beck, Ian J Bloodworth, A. A. Carter, G. E. Richards, A. Astbury, P. M. Hattersley, S. Orito, T. Tsukamoto, Austin Ball, A. Montanari, P. Jovanovic, J. Banks, J. R. Carter, N. Tesch, C. J. Virtue, M. A. Whalley, G. Mikenberg, T. R. Wyatt, S. W. O'Neale, L. Köpke, Stefan Kluth, J. R. Batley, R. Sobie, R. P. Middleton, C. Geich-Gimbel, P. S. Wells, R. J. Homer, R. Shypit, R. D. Heuer, Fabrizio Fabbri, D. Van den plas, T. Behnke, J. P. Walker, D. G. Fong, J. Gascon, H. von der Schmitt, J. M. Roney, Marcello Mannelli, J. E. Duboscq, N. Wermes, P. Scharff-Hansen, P. Teixeira-Dias, B. Schmitt, J. W. Gary, A. M. Smith, D. J.P. Dumas, D. A. Hinshaw, A. D. Schaile, K. W. Bell, Stephen Lloyd, M. Tecchio, S. W. Gensler, S. J. Hillier, P. Taras, Phillip Allport, Paolo Capiluppi, C. Schwick, and M. S. Dixit
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, High Energy Physics::Phenomenology, Nuclear Theory, Monte Carlo method, Hadron, Strangeness, Nuclear physics, Baryon, High Energy Physics::Experiment, Rapidity, Baryon number, Nuclear Experiment, Particle Physics - Experiment
Abstract: The production dynamics of baryon-antibaryon pairs are investigated using hadronic Z0 decays, recorded with the OPAL detector, which contain at least two identified Λ baryons. The rapidly difference for Λ Λ pairs shows the correlations expected from models with a chain-like production of baryon-antibaryon pairs. If the baryon number of a Λ is compensated by a Λ , the Λ is found with a probability of 53% in an interval of ±0.6 around the Λ rapidity. This correlation strength is weaker than predicted by the Herwig Monte Carlo and the Jetset Monte Carlo with a production chain of baryon-antibaryon, and stronger than predicted by the UCLA model. The observed rapidity correlations can be described by the Jetset Monte Carlo with a dominant production chain of baryon-meson-antibaryon, the popcorn mechanism. In addition to the short range correlations, one finds an indication of a correlation of Λ Λ pairs in opposite hemispheres if both the Λ and the Λ have large rapidities. Such long range correlations are expected if the primary quark flavours are compensated in opposite hemispheres and if these quarks are found in energetic baryons. Rates for simultaneous baryon and strangeness number compensation for Λ Λ , Ξ − Ξ + and Ξ − Λ ( Λ + Λ ) are measured and compared with different Monte Carlo models.
Published: 1993

6. A measurement of (892)± production in hadronic Z0 decays

Author: J. Steuerer, T. Kobayashi, M. Fincke-Keeler, P. D. Acton, S. Bethke, A. Astbury, P. M. Hattersley, J. Letts, G. Quast, E. Duchovni, L. Köpke, W. Mohr, D. R. Rust, P. A. Elcombe, J. Schwiening, S. J. Hillier, F. Odorici, P. Routenburg, C. Geich-Gimbel, J. Hart, R. Shypit, F. G. Oakham, S. Weisz, R. D. Heuer, Fabrizio Fabbri, Tara Shears, A. Simon, J. A. Wilson, D. Van den plas, P. Igo-Kemenes, K. Runge, E. Ros, R. M. Brown, S. Tarem, S. Levegrün, T. Mori, P. Bentkowski, T. J. McMahon, Otmar Biebel, D. G. Charlton, D. L. Wagner, N. J. Tresilian, G. Mikenberg, B. Nellen, P. S. Wells, G. Duckeck, C. M. Hawkes, A. Pouladdej, H. Przysiezniak, H. Deng, E. Torrente-Lujan, X. C. Lou, B. Poli, Tohru Takeshita, R. Humbert, S. W. O'Neale, W. Schappert, Carla Sbarra, Roger Barlow, R. J. Homer, G. G. Hanson, S. Dado, Horst Breuker, H. G. Evans, M. J. Goodrick, G. Beaudoin, S. Wotton, R. Ströhmer, D. Karlen, F. Lamarche, R. Yaari, M. H. Lehto, J. Goldberg, F. C. Grant, C. Markus, G. Giacomelli, T. Hilse, B. C. Shen, L. Levinson, W. Gorn, R. Sobie, G. N. Patrick, H. O. Ogren, S. Bougerolle, E.J. Prebys, P. Paschievici, C. J. Virtue, O. Ganel, S. Komamiya, J. F. Kral, A. M. Lee, D. Axen, D. Pitman, A. K. Honma, G. P. Siroli, N. I. Geddes, T. Wlodek, N. Tesch, Frans Meijers, P. Bright-Thomas, A. Buijs, D. M. Strom, T. P. Kokott, C. Grandi, T. R. Wyatt, S. Arcelli, S. Rossberg, H. Jeremie, M. Jimack, B. Panzer-Steindel, C. Jui, A. Dieckmann, J. E. Conboy, J. C. Hill, Tatsuo Kawamoto, M. Cooper, G. J. VanDalen, Stefan Kluth, S. Schreiber, W. J. Collins, Peter R Hobson, R. J. Hemingway, J. Banks, G. Tysarczyk-Niemeyer, F. X. Gentit, R. Mir, D. J. Miller, P. Weber, J. Kroll, C. J. Oram, F. K. Loebinger, Gideon Bella, G. Yekutieli, D. E. Plane, J. Ludwig, A. Yeaman, M. A. Thomson, E. do Couto e Silva, G. A. Snow, C. P. Ward, E. Heflin, D. L. Rees, K. Stephens, H. J. Burckhart, D. Hochman, J. Pinfold, Jacqueline Batley, Richard Keeler, C. K. Hargrove, M. J. Oreglia, P. Pfister, P. Sherwood, S. Marcellini, Ian J Bloodworth, C. Wahl, T. J. Smith, M. Cuffani, N. K. Watson, A. Beck, C. Moisan, P. M. Watkins, Alan Watson, G. Transtromer, G. Azuelos, D. J.P. Dumas, O. Runolfsson, A. Gaidot, S. Orito, F. S. Merritt, A. Rollnik, W. R. Gibson, M. Sasaki, A. Montanari, S. W. Gensler, R. K. Carnegie, C. Leroy, A. D. Schaile, J. R. Carter, John Hobbs, U. Binder, J. R. McNutt, Austin Ball, A. C. Janissen, C. Y. Chang, M. F. Turner, G. Vasseur, P. Berlich, S. De Jong, M. Weber, E. Etzion, J. Becker, U. Maur, T. Mashimo, M. J. Losty, P. Mättig, M. Sproston, M. Settles, G. A. Bahan, T. Tsukamoto, G. W. Wilson, Mitsuaki Nozaki, J. A. McKenna, J. P. Martin, M. Foucher, J. D. Gillies, J. Mildenberger, B. Lorazo, H. M. Fischer, R. E. Hughes-Jones, A. Wagner, M. Coupland, P. Schenk, B. W. Kennedy, D. C. Imrie, C. Burgard, M. A. Whalley, J. E. Pilcher, V. Gibson, V. H. Winterer, John Baines, G. M. Dallavalle, D. R. Ward, B. Boden, M. Hansroul, P. Teixeira-Dias, P. Taras, J. von Krogh, P. Poffenberger, P. F. Harrison, H. Mes, J. P. Pansart, Phillip Allport, Peter Clarke, Dave Robinson, L. A. del Pozo, M. Hauschild, J. C. Clayton, N. Paz-Jaoshvili, P. G. Estabrooks, I. Cohen, K. J. Anderson, P. Kyberd, W. G. Scott, T. W. Pritchard, John Allison, Paolo Capiluppi, C. Schwick, J. M. Lorah, A. M. Rossi, R. F. McGowan, M. S. Dixit, M. Jobes, G. D. Lafferty, Kiyotomo Kawagoe, P. Leblanc, R. G. Kellogg, D. S. Koetke, R. W.L. Jones, G. E. Richards, K. W. Bell, Stephen Lloyd, M. Tecchio, O. Schaile, D. Menszner, Harold Nguyen, R. P. Middleton, J. Hagemann, P. Bock, A. Michelini, M. Kuwano, R. Lahmann, G. Alexander, P.P. Singh, M. W. Redmond, M. Rosvick, H. M. Bosch, A. A. Carter, T. Mouthuy, G. T. Zorn, N. Wermes, P. Scharff-Hansen, B. Schmitt, J. W. Gary, A. M. Smith, M. Yurko, P. W. Jeffreys, D. A. Hinshaw, Wolfram Dietrich Zeuner, P. Jovanovic, J. P. Walker, D. G. Fong, A. Jawahery, J. Gascon, H. von der Schmitt, J. M. Roney, R. W. Springer, Marcello Mannelli, J. E. Duboscq, Andris Skuja, S. Barnett, A. J. Martin, D. Lellouch, T. Behnke, I. P. Duerdoth, C. H. Shepherd-Themistocleous, H. Ihssen, J. G. Layter, R. Kowalewski, G. Maringer, N. J. Thackray, R. Van Kooten, and M. Dittmar
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Cross section (physics), Particle physics, Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, High Energy Physics::Experiment, Event (particle physics), Particle Physics - Experiment
Abstract: This is the post-print version of the Article - Copyright @ 1993 Elsevier. Measurements are presented of the inclusive cross section for K∗(892)± production in hadronic decays of the Z0 using a sample of about half a million events recorded with the OPAL experiment at LEP. Charged K∗ mesons are reconstructed in the decay channel K0Sπ±. A mean rate of 0.72±0.02±0.08 K∗ mesons per hadronic event is found. Comparison of the results with predictions of the JETSET and HERWIG models shows that JETSET overestimates the K∗± production cross section while HERWIG is consistent with the data. This study was supported by the Department of Energy, USA, National Science Foundation, USA, Science and Engineering Research Council, UK, Natural Sciences and Engineering Research Council, Canada, Israeli Ministry of Science, Minerva Gesellschaft, Japanese Ministry of Education, Science and Culture (the Monbusho) and a grant under the Monbusho International Science Research Program, American Israeli Bi-national Science Foundation, Direction des Sciences de la Matibre du Commissariat ~ l'Energie Atomique, France, Bundesministerium f'fir Forschung und Technologie, FRG, National Research Council of Canada, Canada, A.P. Sloan Foundation and Junta Nacional de Investigag~o Ciendfica e Tecnolrgica, Portugal.
Published: 1993

7. A study of the electric charge distributions of quark and gluon jets in hadronic Z0 decays

Author: T. W. Pritchard, D. E. Plane, J. Gascon, J. A. Wilson, Horst Breuker, K. Stephens, G. Yekutieli, R. Giacomelli, H. M. Bosch, S. Levegrün, M. Cuffiani, A. Jawahery, D. J. Miller, Tohru Takeshita, M. A. Thomson, I. Cohen, R. F. McGowan, Alan Watson, J. P. Walker, A. M. Rossi, Richard Keeler, J. Mildenberger, M. Weber, I. J. Bloodworth, R. Mir, G. D. Lafferty, R. W. Springer, John Carter, John Hobbs, D. J.P. Dumas, M. Jimack, M. Kuwano, P. Bright-Thomas, P. Kyberd, J. P. Pansart, J. F. Kral, J. Allison, J. Steuerer, D. Karlen, T. Wlodek, R. J. Hemingway, C. J. Oram, A. Gaidot, Gideon Bella, W. R. Gibson, S. W. O'Neale, H. J. Burckhart, P. M. Hattersley, A. Wagner, H. Przysiezniak, F. C. Grant, J. Hagemann, O. Runolfsson, R. Ströhmer, D. C. Imrie, S. Wotton, D. A. Hinshaw, B. Panzer-Steindel, E. Ros, R. J. Homer, J. Hart, A. Astbury, J. P. Martin, A. Rollnik, U. Maur, H. Mes, K. Runge, S. Kluth, G. Vasseur, W. Gorn, D. Hochman, P. Mättig, Carla Sbarra, P. Igo-Kemenes, R. D. Heuer, P. Berlich, B. C. Shen, R. W.L. Jones, J. C. Hill, J. D. Gillies, J. R. Batley, T. J. McMahon, M. A. Whalley, P. Bentkowski, P. A. Elcombe, J. C. Clayton, T. Kawamoto, T. Hilse, J. Pinfold, P. G. Estabrooks, N. Paz-Jaoshvili, D. Van den plas, T. Tsukamoto, A. Beck, D. Menszner, John Baines, J. Becker, G. G. Hanson, P. S. Wells, C. Geich-Gimbel, R. G. Kellogg, G. P. Siroli, J. M. Lorah, G. Transtromer, G. Alexander, A. Pouladdej, Phillip Allport, D. Lellouch, J. Letts, S. Orito, G. J. VanDalen, T. Behnke, Andris Skuja, J. Kroll, M. Dittmar, C. K. Hargrove, D. S. Koetke, G. Maringer, D. R. Ward, V. H. Winterer, R. M. Brown, P. M. Watkins, U. Binder, M. Yurko, T. R. Wyatt, R. J. Barlow, A. M. Lee, M. J. Oreglia, G. T. Zorn, M. Hansroul, B. Nellen, P. Taras, C. Moisan, J. Goldberg, O. Biebel, R. Sobie, S. Bethke, C. Burgard, P. Bock, A. Buijs, C. Schwick, G. Mikenberg, M. Sasaki, N. I. Geddes, T. P. Kokott, L. Levinson, P. Singh, D. M. Strom, S. Tarem, A. Dieckmann, C. J. Virtue, N. J. Tresilian, F. G. Oakham, D. R. Rust, A. A. Carter, T. Mashimo, A. J. Martin, R. P. Middleton, F. S. Merritt, J. E. Pilcher, T. J. Smith, F. X. Gentit, Austin Ball, K. J. Anderson, W. J. Collins, W. Schappert, S. Barnett, Maurice Goodrick, Paolo Capiluppi, E. Heflin, N. K. Watson, C. P. Ward, F. Lamarche, M. Nozaki, B. Schmitt, R. E. Hughes-Jones, G. W. Wilson, P. Poffenberger, O. Ganel, P. Routenburg, C. Wahl, B. Lorazo, J. W. Gary, Harold Nguyen, H. G. Evans, A. D. Schaile, C. Grandi, T. Mori, P. Weber, E. do Couto e Silva, L. Köpke, D. G. Charlton, D. L. Wagner, P. Teixeira-Dias, T. Kobayashi, G. Quast, G. Duckeck, G. Azuelos, W. G. Scott, J. A. McKenna, M. Hauschild, M. S. Dixit, A. Montanari, E. Torrente-Lujan, J. Ludwig, S. De Jong, Wolfram Dietrich Zeuner, H. Deng, S. Marcellini, C. M. Hawkes, J. Schwiening, C. Y. Chang, M. F. Turner, X. C. Lou, P. D. Acton, Stephen Lloyd, M. J. Losty, P. Scharff-Hansen, D. Axen, R. Yaari, P. Pfister, F. Odorici, E. Etzion, M. Rosvick, S. Arcelli, M. Tecchio, M. Coupland, P. Sherwood, G. A. Beck, C. Markus, G. Giacomelli, J. R. McNutt, A. Simon, P. Jovanovic, M. Cooper, H. M. Fischer, S. Rossberg, P. W. Jeffreys, M. Fincke-Keeler, A. M. Smith, H. O. Ogren, M. Settles, M. W. Redmond, R. Shypit, R. Kowalewski, O. Schaile, M. Sproston, G. N. Patrick, K. W. Bell, G. A. Bahan, S. W. Gensler, F. K. Loebinger, B. Poli, S. J. Hillier, M. H. Lehto, J. E. Conboy, P. E.L. Clarke, M. Fierro, D. G. Fong, H. von der Schmitt, H. Jeremie, J. G. Layter, N. Wermes, I. P. Duerdoth, A. Michelini, M. Foucher, P. Leblanc, M. Jobes, Marcello Mannelli, J. E. Duboscq, N. J. Thackray, B. W. Kennedy, T. Mouthuy, P. Paschievici, A. C. Janissen, J. M. Roney, R. Lahmann, H. Ihssen, A. Yeaman, S. Dado, A. K. Honma, S. Komamiya, P. R. Hobson, W. Mohr, Frans Meijers, R. Humbert, J. Banks, P. Schenk, E. Duchovni, G. A. Snow, D. L. Rees, C. Leroy, S. L. Chu, S. Schreiber, V. Gibson, C. Jui, G. Tysarczyk-Niemeyer, K. Kawagoe, P. F. Harrison, R. K. Carnegie, B. Boden, G. M. Dallavalle, J. von Krogh, C. H. Shepherd-Themistocleous, Dave Robinson, N. Tesch, L. A. del Pozo, G. Beaudoin, D. Pitman, G. E. Richards, R. Van Kooten, Franco Luigi Fabbri, and Tara Shears
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Charge conservation, High Energy Physics::Lattice, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, High Energy Physics::Phenomenology, Charge (physics), Jet (particle physics), Bottom quark, Electric charge, Gluon, Nuclear physics, High Energy Physics::Experiment, Particle Physics - Experiment, Lepton
Abstract: A sample of three-jet events containing a lepton with high momentum and transverse momentum is selected from hadronic decays of the Z0. The presence of the lepton indicates the semi-leptonic decay of a bottom quark and allows us, in combination with energy ordering of the jets, to distinguish between quark and gluon jets. The sign of the lepton charge is used to identify jets originating from positively and negatively charged quarks, for the jets with the lepton and for the high energy jets. Defining the jet charge by summing the charge of the particles assigned to a jet, it is observed that the mean jet charge of the quark jets is incompatible with zero and that the sign of the jet charge corresponds to that expected from the charge of the primary quark. In contrast, the mean charge of the gluon jets is consistent with zero.
Published: 1993

8. A measurement of strange baryon production in hadronic Z0 decays

Author: P. Paschievici, D. Karlen, A. Dieckmann, R. Mir, G. P. Siroli, A. Astbury, R. Van Kooten, C. H. Shepherd-Themistocleous, M. Hansroul, T. W. Pritchard, A. Wagner, John Hill, Silvia Arcelli, B. Boden, D. Menszner, T. Mouthuy, Gideon Bella, G. Vasseur, S. De Jong, J. C. Clayton, H. J. Burckhart, Jacqueline Batley, C. Geich-Gimbel, S. Rossberg, D. J. Miller, R. K. Carnegie, P. S. Wells, P. E.L. Clarke, Terry Richard Wyatt, F. G. Oakham, G. T. Zorn, T. Hilse, L. Levinson, R. J. Homer, Kiyotomo Kawagoe, A. Beck, H. G. Evans, John Hobbs, Tohru Takeshita, M. Fincke-Keeler, M. J. Oreglia, F. C. Grant, T. Wlodek, M. A. Whalley, A. M. Rossi, T. Tsukamoto, P. Schenk, M. J. Goodrick, N. Tesch, A. K. Honma, F. S. Merritt, R. Humbert, C. J. Virtue, Sachio Komamiya, W. Mohr, A. Buijs, D. M. Strom, G. N. Patrick, J. Mildenberger, C. Schwick, Richard Keeler, D. Hochman, J. P. Martin, P. Routenburg, O. Ganel, E. Ros, J. P. Walker, K. Runge, M. J. Losty, A. C. Janissen, C. J. Oram, U. Binder, J. M. Roney, J. R. Carter, A. Simon, M. Cooper, A. Rollnik, P. Singh, J. F. Kral, G. Beaudoin, J. A. McKenna, N. Wermes, P. Pfister, B. Poli, R. M. Brown, P. W. Jeffreys, J. Hart, J. Becker, K. J. Anderson, P. Weber, A. J. Martin, Carla Sbarra, X. C. Lou, A. A. Carter, T. P. Kokott, K. Stephens, R. F. McGowan, A. Yeaman, G. E. Richards, C. K. Hargrove, T. Behnke, Misao Sasaki, E. Heflin, J. P. Pansart, A. Michelini, D. A. Hinshaw, C. Markus, Marco Cuffiani, H. O. Ogren, D. G. Charlton, D. L. Wagner, D. Lellouch, C. Y. Chang, I. J. Bloodworth, C. Moisan, P. Berlich, B. C. Shen, G. Tysarczyk-Niemeyer, P. M. Watkins, P. Igo-Kemenes, H. Deng, Harold Nguyen, H. Ihssen, P. Bock, V. Gibson, Mitsuaki Nozaki, R. E. Hughes-Jones, J. G. Layter, A. Gaidot, James D Gillies, S. Wotton, Stefan Kluth, D. J.P. Dumas, R. Kowalewski, J. Kroll, P. Le Du, John Baines, S. Schreiber, S. Bethke, J. Schwiening, B. W. Kennedy, Tara Shears, F. X. Gentit, N. I. Geddes, V. H. Winterer, J. E. Conboy, Richard J Hemingway, B. Panzer-Steindel, M. Settles, G. Duckeck, M. Coupland, P. D. Acton, M. Morii, T. Kawamoto, S. W. O'Neale, Peter R Hobson, H. Mes, O. Runolfsson, P. Lennert, U. Maur, M. Foucher, R. J. Barlow, C. Jui, D. Pitman, Horst Breuker, P. M. Hattersley, P. Poffenberger, S. Orito, C. Wahl, E. do Couto e Silva, P. Mättig, D. R. Ward, P. Teixeira-Dias, M. F. Turner, G. A. Snow, C. P. Ward, G. W. Wilson, M. Hauschild, I. P. Duerdoth, F. Lamarche, H. M. Bosch, D. C. Imrie, C. Leroy, J. Steuerer, G. G. Hanson, G. Alexander, S. Bougerolle, J. Hagemann, H. Przysiezniak, E. Etzion, B. Lorazo, G. Quast, P. Leblanc, G. Giacomelli, J. Goldberg, Wolfram Dietrich Zeuner, E.J. Prebys, R. Ströhmer, Claudio Grandi, T. J. Smith, W. J. Collins, S. Dado, N. K. Watson, F. K. Loebinger, G. D. Lafferty, D. Axen, Frans Meijers, J. M. Lorah, A. Jawahery, B. Nellen, D. E. Plane, C. M. Hawkes, Peter Sherwood, W. R. Gibson, Stephen Hillier, G. M. Dallavalle, R. W. Springer, A. M. Lee, Takehiko Mori, J. R. McNutt, K. W. Bell, R. P. Middleton, M. Weber, J. Ludwig, C. P. Howarth, M. W. Redmond, A. Pouladdej, J. Gascon, Alan Watson, P. G. Estabrooks, J. E. Pilcher, G. Mikenberg, G. Maringer, S. Barnett, R. Yaari, S. Tarem, O. Biebel, M. Jimack, N. J. Thackray, John Allison, A. D. Schaile, P. Jovanovic, P. A. Elcombe, R. G. Kellogg, Austin Ball, W. Schappert, F. Odorici, Stefano Marcellini, Alessandro Montanari, James Letts, D. L. Rees, G. J. VanDalen, N. Paz-Jaoshvili, M. Kuwano, G. Transtromer, W. G. Scott, P. F. Harrison, Stephen Lloyd, M. Tecchio, M. Yurko, R. Shypit, S. W. Gensler, T. Kobayashi, D. G. Fong, H. von der Schmitt, Phillip Allport, R. Sobie, H. Jeremie, J. W. Gary, Marcello Mannelli, J. E. Duboscq, M. Jobes, P. Kyberd, Paolo Capiluppi, P. Scharff-Hansen, A. M. Smith, Andris Skuja, Tetsuro Mashimo, W. Gorn, G. Yekutieli, M. Rosvick, G. A. Bahan, R. W.L. Jones, J. von Krogh, Dave Robinson, L. A. del Pozo, Michael Dittmar, H. M. Fischer, T. J. McMahon, O. Schaile, M. H. Lehto, E. Duchovni, J. A. Wilson, S. Levegrün, L. Köpke, I. Cohen, M. S. Dixit, J. Banks, G. Azuelos, N. J. Tresilian, S. Weisz, R. D. Heuer, Fabrizio Fabbri, D. Van den plas, D. R. Rust, M. Sproston, and P. Taras
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Octet, High Energy Physics::Lattice, Electron–positron annihilation, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, OPAL detector, Baryon, Nuclear physics, Momentum, Diquark, QCD predictions, High Energy Physics::Experiment, Strange baryons, Particle Physics - Experiment, Spin-½
Abstract: The production of the octet and decuplet baryons Λ, Ξ − , Σ (1385) ± , Ξ(1530) 0 and Ω − and the corresponding antibaryons has been measured in a sample of 485 000 hadronic Z 0 decays. Results on differential and integrated cross sections are presented. The differential cross section of Λ baryons is found to be softer than the one predicted by the Jetset and Herwig Monte Carlo generators. The measured decuplet yields are found to disagree with the simple diquark picture where only one tuning parameter for spin 1 diquarks is used. Comparisons of the momentum spectra for Λ and Ξ − with the predictions of an analytical QCD formula are also presented.
Published: 1992

9. A study of two-particle momentum correlations in hadronic Z0 decays

Author: M. Jimack, P. Igo-Kemenes, G. Maringer, Shlomo Dado, John Allison, H. Jeremie, D. J. Miller, F. Lamarche, R. J. Hemingway, D. E. Klem, Michael Dittmar, G. Yekutieli, P. S. Wells, A. A. Carter, R. E. Hughes-Jones, U. Maur, Terry Richard Wyatt, I. J. Bloodworth, X. C. Lou, R. G. Kellogg, P. Jovanovic, Horst Breuker, Erez Etzion, H. Mes, M. Coupland, Austin Ball, D. Menszner, F. C. Grant, P. G. Estabrooks, D. R. Rust, R. Mir, I. P. Duerdoth, M. A. Whalley, Stefano Marcellini, Gareth J. Barker, M. Settles, B. C. Shen, K. J. Anderson, Gideon Bella, Giora Mikenberg, Shlomit Tarem, P. E.L. Clarke, H. Oh, E. do Couto e Silva, Alessandro Montanari, James Letts, W. J. Collins, K. Stephens, J. Steuerer, A. K. Honma, P. Lennert, H. J. Burckhart, Randall Sobie, G. D. Lafferty, S. Rossberg, W. G. Scott, A. Buijs, C. Y. Chang, Jacqueline Batley, C. J. Oram, P. M. Watkins, H. O. Ogren, J. R. McNutt, M. Yurko, P. M. Hattersley, W. R. Gibson, P. Taras, Christoph Geich-Gimbel, T. W. Pritchard, G. W. Wilson, R. P. Middleton, N. I. Geddes, R. Kowalewski, J. Mildenberger, Harold Nguyen, D. Karlen, M. Hauschild, Glenn Patrick, P. W. Jeffreys, A. M. Lee, E. Ros, M. J. Oreglia, P. Paschievici, Kiyotomo Kawagoe, M. Hansroul, H. Takeda, M. M. Deninno, J. Goldberg, B. Boden, D. Axen, M. J. Losty, B. Nellen, F. G. Oakham, G. A. Snow, C. P. Ward, Silvia Arcelli, A. Jawahery, J. Kroll, B. Poli, N. Paz-Jaoshvili, P. Leblanc, J. M. Roney, Paul Kyberd, F. K. Loebinger, A. Beck, P. F. Harrison, T. J. Smith, J. Hart, F. X. Gentit, E. Heflin, G. Tysarczyk-Niemeyer, Richard Keeler, R. Yaari, J. E. Conboy, P. Weber, M. F. Turner, S. Bethke, A. D. Schaile, V. Gibson, Peter Sherwood, J. R. Carter, P. Poffenberger, G. Quast, M. Ogg, P. D. Acton, Stephen Lloyd, M. W. Redmond, Marco Cuffiani, H. G. Evans, J. Banks, J. P. Pansart, P. Mättig, R. M. Brown, Lorne Levinson, J. D. Gillies, A. Rollnik, A. Simon, D. G. Fong, Otmar Biebel, G. E. Richards, M. J. Goodrick, I. Cohen, N. J. Tresilian, J. G. Layter, John Baines, N. Wermes, A. Pouladdej, R. W. Springer, Alexander Wagner, Tohru Takeshita, V. H. Winterer, T. Mouthuy, S. Weisz, R. D. Heuer, D. G. Charlton, D. L. Wagner, J. Gascon, C. M. Hawkes, H. von der Schmitt, M. Cooper, P. Singh, Claude Leroy, B. W. Kennedy, Fabrizio Fabbri, M. Couch, Ehud Duchovni, R. Shypit, Daniel Lellouch, J. Hagemann, D. Van den plas, J. Ludwig, R. J. Barlow, D. C. Imrie, K. Runge, P. Bock, Takehiko Mori, S. R. Hou, C. Wahl, A. Astbury, T. P. Kokott, Rene Brun, Carla Sbarra, F. S. Merritt, H. Ihssen, R. J. Homer, R. Van Kooten, Georges Azuelos, D. Pitman, R. W. L. Jones, D. R. Ward, R. Humbert, M. H. Lehto, G. Transtromer, C. P. Howarth, S. W. Gensler, J. F. Kral, G. P. Siroli, K. W. Bell, P. Le Du, D. A. Hinshaw, Christoph Schwick, S. Wotton, T. Kobayashi, C. J. Virtue, Max Weber, C. Fukunaga, B. Panzer-Steindel, O. Ganel, J. E. Pilcher, S. Bougerolle, John Hobbs, Misao Sasaki, J. A. McKenna, A. M. Rossi, F. Odorici, T. Tsukamoto, T. Behnke, Phillip Allport, S. Sanghera, S. Levegrün, H. M. Fischer, R. F. McGowan, A. J. Martin, A. Michelini, A. C. Janissen, J. W. Gary, C. Moisan, J. P. Walker, G. Duckeck, R. Ströhmer, S. A. Robins, O. Runolfsson, D. Strom, P. Teixeira-Dias, D. E. Plane, G. T. Zorn, Marcello Mannelli, J. E. Duboscq, Stephen Hillier, P. Berlich, L. Köpke, H. M. Bosch, Wolfram Dietrich Zeuner, G. M. Dallavalle, K. Riles, Andris Skuja, J. P. Martin, T. Kawamoto, Gideon Alexander, Paolo Capiluppi, P. Schenk, S. Barnett, Alan Watson, D. J.P. Dumas, D. Hochman, N. J. Thackray, John Hill, Tetsuro Mashimo, C. K. Hargrove, S. De Jong, S. Orito, Claudio Grandi, M. Rosvick, W. Gorn, Margret Fincke-Keeler, G. A. Bahan, M. Jobes, U. Binder, P. Scharff-Hansen, H. Przysiezniak, P. Pfister, G. G. Hanson, A. M. Smith, G. Vasseur, B. Lorazo, G. Giacomelli, N. K. Watson, E.J. Prebys, M. S. Dixit, S. Komamiya, Frans Meijers, S. W. O'Neale, Peter R Hobson, J. M. Lorah, W. Mohr, A. Gaidot, M. Kuwano, T. Wlodek, M. Sproston, P. Routenburg, N. Tesch, A. Dieckmann, P. A. Elcombe, D. L. Rees, J. Becker, G. J. VanDalen, S. Schreiber, T. J. McMahon, J. Schwiening, R. K. Carnegie, J. A. Wilson, W. Schappert, J. von Krogh, Dave Robinson, L. A. del Pozo, and G. Beaudoin
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Logarithm, High Energy Physics::Phenomenology, Monte Carlo method, Hadron, String (physics), Hadronization, Nuclear physics, Momentum, High Energy Physics::Experiment, Parton shower, Particle Physics - Experiment
Abstract: We report on a measurement of two-particle momentum correlations in hadronic decays of the Z 0 at LEP. These data are compared with recent analytic QCD calculations based on the summation of leading and next-to-leading logarithms, and with QCD Monte Carlo simulations. We find that the analytic calculations show the same general features as the data, but that the overall level of the correlations is not reproduced, suggesting that higher order or hadronization effects are significant. This contrasts with the success of similar QCD calculations in describing single-particle momentum distributions. QCD Monte Carlo models are found to give a reasonable level of correlation, with parton shower models incorporating string hadronization giving the best description of the data.
Published: 1992

10. Evidence for b-flavoured baryon production in Z0 decays at LEP

Author: J. Allison, G. Duckeck, R. Ströhmer, D. Strom, G. T. Zorn, G. G. Hanson, A. Astbury, C. Y. Chang, M. Yurko, P. W. Jeffreys, F. S. Merritt, B. C. Shen, H. M. Bosch, Wolfram Dietrich Zeuner, H. M. Fischer, J. Hart, P. Taras, O. Ganel, D. C. Imrie, A. M. Lee, Margret Fincke-Keeler, A. K. Honma, W. G. Scott, J. von Krogh, A. J. Martin, J. A. McKenna, P. G. Estabrooks, R. K. Keeler, A. Michelini, A. C. Janissen, G. Giacomelli, R. F. McGowan, R. Kowalewski, H. O. Ogren, Christoph Geich-Gimbel, E.J. Prebys, M. M. Deninno, J. Kroll, F. X. Gentit, J. E. Conboy, M. Ogg, P. Ashton, A. Pouladdej, K. Riles, P. Pfister, G. Beaudoin, G. P. Siroli, Dave Robinson, L. A. del Pozo, Y. Yang, R. Van Kooten, M. S. Dixit, Frans Meijers, R. Mir, S. A. Robins, D. Pitman, C. K. Hargrove, P. M. Watkins, H. Mes, H. Oh, P. F. Harrison, M. J. Losty, I. P. Duerdoth, M. H. Lehto, J. M. Lorah, Shlomo Dado, P. D. Acton, Stephen Lloyd, D. A. Hinshaw, Michael Dittmar, P. Igo-Kemenes, G. Maringer, D. E. Plane, W. Mohr, G. Yekutieli, J. G. Layter, B. B. Brabson, N. Wermes, D. G. Fong, Ehud Duchovni, M. F. Turner, H. Jeremie, M. Hansroul, P. Poffenberger, T. Mouthuy, Stephen Hillier, M. J. Oreglia, X. C. Lou, G. M. Dallavalle, K. Stephens, Paul Kyberd, F. K. Loebinger, J. R. McNutt, Kiyotomo Kawagoe, R. Shypit, T. Behnke, A. A. Carter, R. E. Hughes-Jones, U. Maur, Giora Mikenberg, Erez Etzion, S. Sanghera, J. Gascon, I. Wingerter, R. J. Homer, Tohru Takeshita, H. von der Schmitt, S. J. Pawley, P. Berlich, M. W. Redmond, J. M. Roney, H. Ihssen, D. J.P. Dumas, O. Schaile, John Hobbs, D. Axen, L. Köpke, P. Singh, Silvia Arcelli, A. Gaidot, Georges Azuelos, E. do Couto e Silva, S. W. Gensler, J. R. Carter, G. N. Patrick, A. Simon, Otmar Biebel, C. Moisan, J. P. Walker, M. Kuwano, T. Wlodek, P. Weber, M. Sproston, A. M. Rossi, J. P. Martin, P. Teixeira-Dias, S. Schreiber, A. Jawahery, G. Tysarczyk-Niemeyer, Peter Sherwood, T. J. McMahon, T. Kobayashi, D. E. Klen, Gareth J. Barker, D. G. Charlton, D. L. Wagner, M. Couch, T. Tsukamoto, S. Levegrün, V. Gibson, R. W. L. Jones, G. Quast, R. W. Springer, Alexander Wagner, Claude Leroy, A. Rollnik, J. F. Kral, P. Routenburg, K. W. Bell, J. Hagemann, J. Ludwig, K. Runge, A. Dieckmann, P. Bock, J. W. Gary, P. E.L. Clarke, J. P. Pansart, J. Banks, Max Weber, J. Schwiening, R. K. Carnegie, Shlomit Tarem, R. Humbert, G. A. Snow, C. P. Ward, S. De Jong, J. C. Hill, S. Weisz, J. A. Wilson, N. I. Geddes, R. D. Heuer, S. Bougerolle, F. Odorici, J. R. McMahon, Misao Sasaki, Fabrizio Fabbri, D. J. Miller, D. Van den plas, W. Schappert, B. Boden, T. Kawamoto, P. Debu, B. Poli, Horst Breuker, Phillip Allport, P. Le Du, H. Kreutzmann, B. Panzer-Steindel, John Baines, Marcello Mannelli, D. R. Rust, S. Orito, M. Rosvick, P. S. Wells, O. Runolfsson, J. Mildenberger, Harold Nguyen, M. Jobes, U. Binder, C. J. Virtue, S. Rossberg, G. D. Lafferty, C. J. Oram, P. Lennert, Gideon Alexander, Paolo Capiluppi, P. Schenk, W. R. Gibson, C. Ho, M. Coupland, Gideon Bella, H. J. Burckhart, P. Scharff-Hansen, Claudio Grandi, C. Wahl, D. R. Ward, R. Yaari, H. Takeda, A. Beck, G. Transtromer, E. Heflin, S. Bethke, W. J. Larson, R. M. Brown, Marco Cuffiani, Lorne Levinson, R. P. Middleton, M. W. Moss, Jacqueline Batley, F. C. Grant, M. Jimack, B. W. Kennedy, M. A. Whalley, K. J. Anderson, T. R. Wyatt, F. G. Oakham, P. M. Hattersley, R. J. Barlow, H. Przysiezniak, C. P. Howarth, R. G. Kellogg, B. P. O'Neill, S. Wotton, A. M. Smith, Stefano Marcellini, James Letts, G. Vasseur, J. Goldberg, A. Buijs, J. E. Pilcher, B. Lorazo, B. Nellen, P. Leblanc, Andris Skuja, I. J. Bloodworth, H. G. Evans, M. J. Goodrick, I. Cohen, Tetsuro Mashimo, M. Settles, D. Hochman, N. J. Thackray, M. Hauschild, A. D. Schaile, P. Paschievici, N. K. Watson, G. W. Wilson, D. Karlen, J. D. Gillies, G. A. Bahan, V. H. Winterer, T. J. Smith, P. Mättig, S. R. Hou, C. M. Hawkes, M. Cooper, Daniel Lellouch, N. C. Wood, Takehiko Mori, W. Corn, S. W. O'Neale, Peter R Hobson, Sachio Komamiya, E. Ros, A. T. Watson, C. Fukunaga, T. P. Kokott, Rene Brun, F. Lamarche, R. J. Hemingway, P. Jovanovic, Austin Ball, D. Menszner, Alessandro Montanari, W. J. Collins, Randall Sobie, T. W. Pritchard, P. A. Elcombe, D. L. Rees, J. Becker, and G. J. VanDalen
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, Branching fraction, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Electron, Nuclear physics, Baryon, High Energy Physics::Experiment, Particle Physics - Experiment, Boson
Abstract: We observe evidence for the production of b-flavoured baryons in decays of the Z 0 boson with the OPAL detector at LEP. We find 68 Λl − , Λ l + candidates in 458 583 hadronic Z 0 decays. We interpret this as a signal of 55 ± 9 +0.3 −3.1 events from the semi-leptonic decays of b baryons. Assuming weakly decaying b baryons produced in Z 0 decays are mostly Λ b particles, we measure the product branching ratio (Γ b b /Γ had ) f ( b →Λ b ) B (Λ b →Λl − v X ) , averaged over the electron and muon channels, to be (6.2±1.0±1.5)×10 −4 .
Published: 1992

11. Test of CP-invariance in e+e−→Z0→τ+τ− and a limit on the weak dipole moment of the τ lepton

Author: D. J. Miller, B. B. Brabson, C. M. Hawkes, M. Cooper, Silvia Arcelli, Daniel Lellouch, Takehiko Mori, D. G. Fong, J. Gascon, Gideon Bella, H. von der Schmitt, H. J. Burckhart, Jacqueline Batley, P. S. Wells, C. J. Virtue, R. Mir, H. Oh, D. Axen, A. Jawahery, Terry Richard Wyatt, G. Beaudoin, T. Mouthuy, P. Singh, R. W. L. Jones, P. Le Du, H. Kreutzmann, B. Panzer-Steindel, M. Coupland, N. K. Watson, B. P. O'Neill, R. Van Kooten, P. E.L. Clarke, P. G. Estabrooks, R. K. Keeler, M. Hansroul, G. Tysarczyk-Niemeyer, J. W. Gary, F. C. Grant, M. A. Whalley, D. Pitman, M. H. Lehto, S. Wotton, P. M. Watkins, Marcello Mannelli, Shlomo Dado, Sachio Komamiya, M. Yurko, E. Ros, A. T. Watson, P. W. Jeffreys, Peter Sherwood, M. J. Oreglia, Phillip Allport, M. Jimack, John Allison, A. Buijs, B. C. Shen, R. W. Springer, Alexander Wagner, P. Igo-Kemenes, G. Maringer, R. J. Homer, I. Wingerter, M. W. Moss, T. P. Kokott, Rene Brun, T. J. Smith, H. O. Ogren, Christoph Geich-Gimbel, U. Biebel, A. M. Rossi, H. Jeremie, Andris Skuja, X. C. Lou, A. M. Lee, P. Mättig, J. Hagemann, S. J. Pawley, R. E. Hughes-Jones, U. Maur, J. Ludwig, A. K. Honma, A. Astbury, M. M. Deninno, K. Runge, P. Bock, O. Ganel, P. Berlich, L. Köpke, Tetsuro Mashimo, T. Tsukamoto, S. Levegrün, Giora Mikenberg, J. Kroll, J. M. Lorah, F. Odorici, R. G. Kellogg, A. J. Martin, W. G. Scott, E. do Couto e Silva, K. Riles, P. M. Hattersley, W. Mohr, I. J. Bloodworth, F. X. Gentit, H. M. Fischer, C. Moisan, J. R. Carter, D. C. Imrie, G. N. Patrick, J. P. Walker, S. Bougerolle, J. E. Conboy, M. Ogg, A. Michelini, M. Settles, C. Fukunaga, A. C. Janissen, R. Kowalewski, Stefano Marcellini, A. Pouladdej, J. Banks, R. Yaari, James Letts, S. Weisz, S. W. O'Neale, Peter R Hobson, P. Teixeira-Dias, F. Lamarche, A. Simon, S. Bethke, F. S. Merritt, R. D. Heuer, Fabrizio Fabbri, D. Van den plas, Marco Cuffiani, W. Gorn, Horst Breuker, G. P. Siroli, Erez Etzion, G. W. Wilson, Gareth J. Barker, G. A. Bahan, D. Karlen, D. R. Rust, M. Jobes, D. G. Charlton, D. L. Wagner, U. Binder, S. A. Robins, M. J. Losty, G. A. Snow, C. P. Ward, R. J. Hemingway, Claude Leroy, J. Mildenberger, C. Wahl, Harold Nguyen, Gideon Alexander, P. Lennert, J. P. Pansart, D. A. Hinshaw, Shlomit Tarem, A. Gaidot, J. A. McKenna, M. Kuwano, T. Wlodek, M. Couch, P. Scharff-Hansen, M. Sproston, W. J. Larson, R. F. McGowan, R. Humbert, Paolo Capiluppi, P. Schenk, H. Mes, I. P. Duerdoth, Kiyotomo Kawagoe, A. M. Smith, A. Dieckmann, John Hobbs, T. Behnke, Margret Fincke-Keeler, C. P. Howarth, G. Vasseur, B. Lorazo, S. Rossberg, W. R. Gibson, P. Routenberg, C. J. Oram, N. I. Geddes, P. Jovanovic, Tohru Takeshita, Paul Kyberd, F. K. Loebinger, J. M. Roney, Austin Ball, N. Wermes, P. A. Elcombe, R. P. Middleton, W. J. Collins, T. Kawamoto, C. K. Hangrove, Georges Azuelos, J. E. Pilcher, G. Duckeck, R. Ströhmer, B. Boden, C. Ho, M. W. Redmond, B. Poli, J. Goldberg, D. Strom, P. Weber, G. T. Zorn, Randall Sobie, G. D. Lafferty, A. Rollnik, D. Menszner, D. L. Rees, J. Becker, J. F. Kral, B. Nellen, Claudio Grandi, K. W. Bell, S. Orito, H. M. Bosch, Wolfram Dietrich Zeuner, Max Weber, M. Rosvick, P. Leblanc, G. J. VanDalen, J. C. Hill, Misao Sasaki, A. Beck, H. G. Evans, M. J. Goodrick, T. W. Pritchard, I. Cohen, E. Heflin, Ehud Duchovni, R. Shypit, R. M. Brown, Alessandro Montanari, Lorne Levinson, A. D. Schaile, B. W. Kennedy, V. H. Winterer, H. Ihssen, O. Runolfsson, J. D. Gillies, O. Schaile, S. R. Hou, D. E. Plane, R. J. Barlow, Stephen Hillier, G. M. Dallavalle, S. W. Gensler, M. Hauschild, D. J.P. Dumas, T. Kobayashi, P. Paschievici, H. Takeda, F. G. Oakham, J. Hart, J. von Krogh, P. Ashton, Dave Robinson, L. A. del Pozo, S. Schreiber, T. J. McMahon, Y. Yang, J. Schwiening, R. K. Carnegie, P. F. Harrison, J. A. Wilson, P. D. Acton, Stephen Lloyd, W. Schappert, Michael Dittmar, H. Przysiezniak, G. Yekutieli, A. A. Carter, P. Pfister, K. J. Anderson, C. Y. Chang, P. Taras, D. E. Klem, M. F. Turner, P. Poffenberger, D. Hochman, N. J. Thackray, K. Stephens, J. R. McNutt, V. Gibson, G. Quast, John Baines, D. R. Ward, G. Transtromer, G. G. Hanson, G. Giacomelli, E.J. Prebys, M. S. Dixit, Frans Meijers, J. P. Martin, S. De Jong, N. C. Wood, P. Debu, J. G. Layter, and S. Sanghera
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Dipole, Neutral current, Electron–positron annihilation, High Energy Physics::Phenomenology, Moment (physics), High Energy Physics::Experiment, Observable, Expectation value, Signature (topology), Lepton
Abstract: Using a sample of 5558 Z 0 → τ + τ − decays produced at LEP a direct test of CP -invariance in the neutral current reaction e + e − → τ + τ − is performed. Samples of events where eachy τ decays into a single particle have been isolated for the construction of CP -odd observables. Three different event classes are considered: lepton-lepton, lepton-hadron, and hadron-hadron. No evidence for a non-zero expectation value of the considered CP -observables and hence for CP -violation is observed. Quantitatively, we deduce from this null result an estimate on the weak dipole moment d τ (m 2 Z = (−4.5 ± 5.3 ± 1.4) × 10 −17 e cm for the lepton-lepton signature and d τ (m 2 Z = (1.4 ± 3.7 ± 1.3) × 10 −17 e cm for the hadron-hadron signature. Combining these results we place a limit with 95% confidence of | d τ |⩽7.0 × 10 −17 e cm.
Published: 1992

12. Measurement of B00 mixing in hadronic Z0 decays

Author: Kiyotomo Kawagoe, O. Ganel, J. Gascon, D. Axen, J. M. Roney, P. Weber, A. Wagner, Andris Skuja, R. P. Middleton, P. Le Du, M. Hauschild, B. Panzer-Steindel, D. E. Plane, Tetsuro Mashimo, J. L. Pinfold, C. Y. Chang, Mitsuaki Nozaki, G. Beaudoin, Stephen Hillier, G. M. Dallavalle, H. Mes, R. Van Kooten, M. H. Lehto, Sachio Komamiya, W. Gorn, Phillip Allport, Tohru Takeshita, P. Poffenberger, A. Astbury, F. K. Loebinger, M. W. Redmond, T. Behnke, R. Mir, H. Oh, R. M. Brown, F. C. Grant, M. A. Whalley, G. J. Barker, G. Yekutieli, D. J.P. Dumas, G. Mikenberg, I. P. Duerdoth, F. S. Merritt, Paolo Capiluppi, G. A. Bahan, G. P. Siroli, J. F. Kral, A. K. Honma, P. R. Hobson, E. Ros, A. T. Watson, G. Vasseur, A. Buijs, M. W. Moss, O. Biebel, P. M. Hattersley, A. Gaidot, N. Wermes, X. C. Lou, E. Etzion, S. J. Pawley, O. Runolfsson, John Hobbs, J. P. Pansart, P. Berlich, Claus Kleinwort, L. Köpke, R. Shypit, D. E. Klem, M. Jobes, U. Binder, G. Alexander, G. Bella, P. E.L. Clarke, R. J. Hemingway, P. Scharff-Hansen, W. J. Larson, C. Ho, C. Geich-Gimbel, Max Weber, M. J. Oreglia, J. Schwiening, P. D. Acton, Claudio Grandi, S. A. Robins, H. Ihssen, N. J. Thackray, K. Stephens, D. A. Hinshaw, H. J. Burckhart, M. Cooper, J. A. McKenna, E. Heflin, J. C. Hill, Misao Sasaki, M. F. Turner, M. Jimack, Jacqueline Batley, J. von Krogh, A. M. Smith, S. W. Gensler, G. Maringer, A. M. Lee, Rene Brun, M. Hansroul, B. W. Kennedy, B. C. Shen, J. M. Lorah, J. Banks, C. Wahl, H. M. Fischer, J. D. Gillies, D. C. Imrie, N. C. Wood, S. Tarem, S. Weisz, B. Lorazo, P. Ashton, Dave Robinson, J. Goldberg, M. Coupland, R. D. Heuer, T. P. Kokott, W. Mohr, C. P. Howarth, J. R. Carter, John Allison, P. Jovanovic, Austin Ball, D. Menszner, R. G. Kellogg, T. J. Smith, L. A. del Pozo, J. E. Pilcher, T. J. McMahon, C. Leroy, Fabrizio Fabbri, R. W.L. Jones, D. Van den plas, V. Gibson, R. J. Homer, M. Rosvick, G. A. Snow, C. P. Ward, P. A. Elcombe, R. K. Carnegie, G. Azuelos, B. B. Brabson, P. Mättig, D. G. Fong, S. Schreiber, Alessandro Montanari, H. von der Schmitt, G. N. Patrick, T. Kobayashi, J. G. Layter, A. A. Carter, B. Poli, Stefano Marcellini, J. A. Wilson, D. Pitman, R. Kowalewski, P. Debu, John Baines, E. Duchovni, D. R. Rust, B. Nellen, M. Sproston, W. Schappert, D. L. Rees, J. Becker, S. Bethke, G. Quast, Marco Cuffiani, C. M. Hawkes, D. G. Charlton, James Letts, M. Couch, P. Schenk, P. Lennert, J. Hart, O. Schaile, P. Taras, J. W. Gary, C. J. Oram, C. Fukunaga, M. J. Losty, A. J. Martin, C. Moisan, Marcello Mannelli, G. J. VanDalen, D. R. Ward, R. Humbert, P. F. Harrison, K. J. Anderson, Takehiko Mori, Michael Dittmar, S. Sanghera, J. Hagemann, P. S. Wells, C. J. Virtue, N. I. Geddes, P. Pfister, A. Michelini, A. C. Janissen, Terry Richard Wyatt, P. W. Jeffreys, A. Jawahery, R. Yaari, M. Fincke-Keeler, R. J. Barlow, G. Tysarczyk-Niemeyer, D. J. Miller, J. Mildenberger, Harold Nguyen, W. R. Gibson, A. Simon, T. W. Pritchard, Y. Yang, T. Kawamoto, Peter Sherwood, F. Odorici, D. Lellouch, M. Kuwano, R. W. Springer, J. Ludwig, P. Routenburg, S. Orito, A. Dieckmann, K. Runge, P. Bock, F. Lamarche, N. K. Watson, I. Cohen, D. Hochman, B. Boden, M. Yurko, G. Eckerlin, S. De Jong, I. J. Bloodworth, J. P. Walker, P. Teixeira-Dias, T. Mouthuy, G. Duckeck, R. Ströhmer, A. Rollnik, L. Levinson, W. J. Collins, G. D. Lafferty, D. Strom, H. Takeda, G. T. Zorn, F. G. Oakham, R. F. McGowan, P. Paschievici, H. M. Bosch, G. W. Wilson, M. Settles, H. O. Ogren, A. M. Rossi, P. Leblanc, Wolfram Dietrich Zeuner, M. M. Deninno, J. Kroll, J. P. Martin, T. Tsukamoto, S. Dado, G. G. Hanson, J. E. Conboy, M. Ogg, H. Kreutzmann, A. Pouladdej, A. D. Schaile, G. Giacomelli, V. H. Winterer, S. W. O'Neale, E.J. Prebys, S. R. Hou, D. Karlen, M. S. Dixit, Frans Meijers, Silvia Arcelli, U. Maur, S. Wotton, M. Weymann, H. E. Stier, P. G. Estabrooks, P. M. Watkins, P. Kyberd, I. Wingerter, S. Rossberg, K. W. Bell, P. Igo-Kemenes, A. Beck, R. E. Hughes-Jones, W. G. Scott, K. Riles, H. Jeremie, P. Singh, C. K. Hargrove, B. Holl, S. Levegrün, I. Zacharov, R. Sobie, Horst Breuker, S. Bougerolle, R. K. Keeler, M. J. Goodrick, G. Transtromer, H. Przysieniak, J. R. McNutt, S. L. Lloyd, B. P. O'Neill, and F. X. Gentit
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Electron, Jet (particle physics), Bottom quark, Nuclear physics, High Energy Physics::Experiment, Mixing (physics), Lepton
Abstract: From a sample of approximately 135 000 hadronic Z0 decays recorded with the OPAL detector, 1 536 events were selected with two lepton candidates, either electrons or muons. A signal for B0 B 0 mixing was observed using the sign of the lepton charge to tag the charge of the b quark in decaying b-flavoured hadrons. A flavour discriminating variable was constructed from the lepton momentum and its component perpendicular to the jet axis. By fitting the fraction of events in which the two lepton charges are of the same sign, as a function of this variable, the average mixing parameter was measured to be χ = 0.145+0.041-0.035 ± 0.018, where the first error is statistical and the second is systematic.
Published: 1992

13. An improved measuremebts of αS (MZ0) using energy correlations with the OPAL detector at LEP

Author: H. M. Fischer, P. A. Elcombe, T. Mouthuy, T. J. McMahon, P. Routenburg, M. Cooper, B. Poli, P. Igo-Kemenes, Sachio Komamiya, A. M. Rossi, P. Debu, T. Tsukamoto, A. Michelini, S. Sanghera, J. Schweining, B. C. Shen, E. Ros, A. T. Watson, I. P. Duerdoth, F. Lamarche, R. Yaari, M. F. Turner, Richard Keeler, P. Jovanovic, D. J.P. Dumas, M. Hansroul, H. Ihssen, Austin Ball, D. L. Rees, W. Schappert, H. O. Ogren, O. Biebel, M. Jimack, John Allison, B. P. O'Neill, A. J. Martin, Rene Brun, Alessandro Montanari, M. Coupland, Gideon Bella, G. Vasseur, R. Mir, A. Astbury, P. Berlich, P. Lennert, R. J. Homer, S. Bougerolle, D. R. Rust, M. W. Moss, M. Sproston, G. J. VanDalen, A. D. Schaile, A. M. Lee, P. Poffenberger, J. Kroll, P. M. Hattersley, K. Stephens, U. Binder, H. Oh, R. G. Kellogg, P. Taras, R. M. Brown, S. W. Gensler, G. Maringer, F. X. Gentit, B. Boden, P. Mättig, E. Etzion, B. B. Brabson, N. C. Wood, W. J. Collins, S. De Jong, J. E. Conboy, T. Kobayashi, H. J. Burckhart, Jacqueline Batley, C. Geich-Gimbel, R. E. Hughes-Jones, G. W. Wilson, D. G. Fong, H. von der Schmitt, D. Menszner, D. Axen, Stefano Marcellini, J. P. Walker, A. C. Janissen, D. Karlen, A. Dieckmann, G. J. Barker, R. K. Carnegie, James Letts, M. Fincke-Keeler, G. D. Lafferty, R. Sobie, G. P. Siroli, Phillip Allport, P. Paschievici, M. Kuwano, P. Teixeira-Dias, A. A. Carter, M. Ogg, Tohru Takeshita, N. K. Watson, P. Singh, R. Shypit, G. Transtromer, G. A. Snow, H. E. Stier, R. Van Kooten, O. Schaile, M. H. Lehto, H. M. Bosch, D. C. Imrie, F. Odorici, V. Gibson, J. L. Pinfold, F. S. Merritt, John Baines, A. Rollnik, F. K. Loebinger, K. W. Bell, C. P. Ward, Kiyotomo Kawagoe, A. Beck, D. E. Plane, W. R. Gibson, Stephen Hillier, M. J. Goodrick, H. Takeda, H. Jeremie, J. W. Gary, H. Kreutzmann, Marcello Mannelli, W. G. Scott, J. Becker, K. J. Anderson, P. S. Wells, P. E.L. Clarke, G. M. Dallavalle, K. Runge, J. P. Martin, T. W. Pritchard, H. Przysiezniak, A. Wagner, J. F. Kral, C. J. Virtue, H. Mes, Terry Richard Wyatt, G. Duckeck, Richard J Hemingway, C. J. Oram, J. M. Roney, O. Runolfsson, M. Jobes, F. G. Oakham, E. Duchovni, P. G. Estabrooks, P. Kyberd, C. K. Hargrove, J. A. McKenna, Paolo Capiluppi, M. W. Redmond, P. Pfister, J. C. Hill, D. R. Ward, F. C. Grant, M. A. Whalley, P. Schenk, P. Scharff-Hansen, S. W. O'Neale, Peter R Hobson, T. P. Kokott, J. Hart, G. Tysarczyk-Niemeyer, Claudio Grandi, C. Ho, W. J. Larson, D. Pitman, Misao Sasaki, R. F. McGowan, A. Pouladdej, Marco Cuffiani, J. M. Lorah, M. M. Dennino, G. Mikenberg, D. Lellouch, C. Y. Chang, S. Rossberg, P. Bock, A. Buijs, S. J. Pawley, E. Heflin, G. G. Hanson, J. P. Pansart, M. J. Oreglia, Y. Yang, N. I. Geddes, R. J. Barlow, G. Alexander, B. Holl, P. Weber, S. Levegrün, P. F. Harrison, Claus Kleinwort, L. Köpke, S. Tarem, A. Gaidot, S. R. Hou, D. J. Miller, R. Humbert, G. N. Patrick, W. Mohr, S. Bethke, P. D. Acton, B. W. Kennedy, M. Hauschild, John Hobbs, S. A. Robins, D. Hochman, C. Fukunaga, I. Zacharov, M. J. Losty, G. Giacomelli, Stephen Lloyd, M. Yurko, J. Mildenberger, E.J. Prebys, Horst Breuker, Mitsuaki Nozaki, P. W. Jeffreys, X. C. Lou, A. M. Smith, C. Wahl, T. Behnke, C. Leroy, M. S. Dixit, B. Lorazo, G. Quast, P. Leblanc, S. Dado, J. Banks, G. Azuelos, Frans Meijers, P. Le Du, S. Weisz, R. D. Heuer, J. R. Carter, B. Panzer-Steindel, Fabrizio Fabbri, D. A. Hinshaw, D. Van den plas, M. Weber, L. Levinson, B. Nellen, J. G. Layter, D. E. Klem, A. K. Honma, D. G. Charlton, O. Ganel, K. Riles, M. Couch, G. Eckerlin, G. Beaudoin, N. J. Thackray, Andris Skuja, Harold Nguyen, J. Ludwig, C. P. Howarth, R. Kowalewski, J. Gascon, J. E. Pilcher, S. Schreiber, T. Kawamoto, S. Orito, V. H. Winterer, Tetsuro Mashimo, P. M. Watkins, W. Gorn, G. Yekutieli, M. Rosvick, G. A. Bahan, I. Wingerter, Silvia Arcelli, S. Wotton, A. Simon, M. Weymann, N. Wermes, A. Jawahery, Peter Sherwood, R. W. Springer, J. R. McNutt, U. Maur, D. Strom, G. T. Zorn, Wolfram Dietrich Zeuner, R. Ströhmer, J. A. Wilson, I. Cohen, Michael Dittmar, R. W.L. Jones, J. von Krogh, P. Ashton, Dave Robinson, L. A. del Pozo, J. Goldberg, T. J. Smith, I. J. Bloodworth, C. Moisan, James D Gillies, M. Settles, J. Hagemann, C. M. Hawkes, Takehiko Mori, and R. P. Middleton
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, media_common.quotation_subject, Electron–positron annihilation, Monte Carlo method, Hadron, Asymmetry, Hadronization, Nuclear physics, Renormalization, Correlation function, High Energy Physics::Experiment, Perturbation theory (quantum mechanics), Particle Physics - Experiment, media_common
Abstract: We report on an improved measurement of the value of the strong coupling constant σs at the Z0 peak, using the asymmetry of the energy-energy correlation function. The analysis, based on second-order perturbation theory and a data sample of about 145000 multihadronic Z0 decays, yields αs(Mz0 = 0.118±0.001(stat.)±0.003(exp.syst.)−0.004+0.0009 (theor. syst.), where the theoretical systematic error accounts for uncertainties due to hadronization, the choice of the renormalization scale and unknown higher-order terms. We adjust the parameters of a second-order matrix element Monte Carlo followed by string hadronization to best describe the energy correlation and other hadronic Z0 decay data. The αs result obtained from this second-order Monte Carlo is found to be unreliable if values of the renormalization scale smaller than about 0.15 Ecm are used in the generator.
Published: 1992

14. A search for scalar leptoquarks in Z0 decays

Author: H. E. Stier, P. G. Estabrooks, Erez Etzion, Gareth J. Barker, N. I. Geddes, P. Schenk, A. D. Schaile, Shlomit Tarem, P. M. Watkins, H. Mes, Kiyotomo Kawagoe, S. Rossberg, I. P. Duerdoth, V. H. Winterer, Tohru Takeshita, I. Wingerter, O. Schaile, A. P. Wagner, R. P. Middleton, B. Poli, S. R. Hou, J. M. Roney, Georges Azuelos, G. Beaudoin, L. Janissen, D. J. Miller, K. W. Bell, Max Weber, Misao Sasaki, H. O. Ogren, J. Goldberg, B. C. Shen, Shlomo Dado, H. Takeda, M. Hansroul, Christoph Geich-Gimbel, B. Nellen, N. Wermes, C. Milstene, P. Leblanc, F. Odorici, W. G. Scott, P. S. Wells, F. G. Oakham, C. J. Virtue, O. Runolfsson, X. C. Lou, P. G. Murphy, M. M. Deninno, Terry Richard Wyatt, B. Holl, J. Kroll, R. J. Homer, R. Kowalewski, L. Lessard, Andris Skuja, S. W. O'Neale, Ehud Duchovni, M. Coupland, T. J. Smith, F. X. Gentit, J. E. Conboy, J. D. Gillies, M. Ogg, M. J. Losty, Peter R Hobson, Giora Mikenberg, Silvia Arcelli, Claudio Grandi, P. Igo-Kemenes, D. C. Imrie, Richard Keeler, P. Mättig, I. Zacharov, C. Y. Chang, M. J. Goodrick, A. Pouladdej, I. Cohen, Tetsuro Mashimo, P. Singh, T. Mouthuy, C. Moisan, J. P. Walker, Horst Breuker, R. J. Barlow, G. Maringer, H. Ihssen, H. Jeremie, K. Stephens, C. Fukunaga, C. M. Hawkes, M. Cooper, Daniel Lellouch, R. Shypit, Takehiko Mori, G. K. VanDalen, P. W. Jeffreys, R. Van Kooten, F. S. Merritt, J. R. McNutt, G. P. Siroli, J. D. Hobbs, Claude Leroy, C. Wahl, P. Taras, S. W. Gensler, J. P. Pansart, R. W. L. Jones, N. C. Wood, W. Gorn, R. E. Hughes-Jones, U. Maur, Mitsuaki Nozaki, A. M. Lee, G. G. Hanson, F. Lamarche, D. E. Plane, R. J. Hemingway, Stephen Hillier, P. Le Du, H. Kreutzmann, B. Panzer-Steindel, V. Gibson, M. H. Lehto, M. A. Whalley, G. A. Bahan, J. Mildenberger, Harold Nguyen, Gunter Quast, S. Wotton, T. Kobayashi, G. M. Dallavalle, John Baines, Margret Fincke-Keeler, I. J. Bloodworth, C. P. Howarth, P. Jovanovic, E. K. U. Gross, A. Gaidot, M. Kuwano, Gideon Bella, H. J. Burckhart, N. K. Watson, M. Sproston, G. A. Snow, C. P. Ward, B. B. Brabson, M. Weymann, A. Buijs, J. E. Pilcher, Austin Ball, G. Giacomelli, J. Hart, E.J. Prebys, A. M. Rossi, D. E. Klem, D. R. Ward, M. Settles, D. Menszner, R. F. McGowan, D. G. Fong, Sachio Komamiya, Jacqueline Batley, B. P. O'Neill, Alan Watson, D. J.P. Dumas, P. Pfister, J. L. Pinfold, A. Astbury, J. Gascon, T. Tsukamoto, H. von der Schmitt, Alessandro Montanari, M. W. Moss, O. Ganel, S. Levegrün, H. M. Fischer, A. J. Martin, M. F. Turner, Y. Yang, P. Routenburg, P. M. Hattersley, T. P. Kokott, Rene Brun, J. Hagemann, J. C. Armitage, G. W. Wilson, D. Karlen, K. Riles, G. Eckerlin, M. S. Dixit, Frans Meijers, C. J. Oram, W. R. Gibson, P. F. Harrison, S. Bougerolle, W. J. Collins, S. J. Pawley, C. Ho, Marcello Mannelli, A. Michelini, Paul Kyberd, F. K. Loebinger, C. K. Hargrove, Stephen Lloyd, M. Jobes, U. Binder, D. Hochman, N. J. Thackray, P. Scharff-Hansen, G. D. Lafferty, A. Dieckmann, Claus Kleinwort, P. A. Elcombe, L. Köpke, W. J. Larson, P. Teixeira-Diaz, H. Przysiezniak, D. R. Rust, M. W. Redmond, J. W. Gary, T. W. Pritchard, J. G. Layter, A. Beck, A. Rollnik, A. M. Smith, P. E.L. Clarke, T. Behnke, E. Heflin, G. Vasseur, B. Lorazo, P. Lennert, Phillip Allport, R. M. Brown, S. Sanghera, M. Hauschild, S. A. Robins, R. Sobie, M. Jimack, John Allison, J. P. Martin, Gideon Alexander, Lorne Levinson, Paolo Capiluppi, K. J. Anderson, John Hill, P. Paschievici, B. W. Kennedy, S. De Jong, R. G. Kellogg, J. Banks, D. L. Rees, J. Becker, R. Yaari, S. Weisz, R. D. Heuer, Fabrizio Fabbri, D. Van den plas, S. Bethke, Marco Cuffiani, Stefano Marcellini, P. Debu, P R Poffenberger, J. M. Lorah, W. Mohr, D. Axen, A. Jawahery, G. Tysarczyk-Niemeyer, Peter Sherwood, R. W. Springer, Michael Dittmar, G. Yekutieli, J. Ludwig, K. Runge, P. Bock, A. Simon, Otmar Biebel, D. G. Charlton, M. Couch, R. Humbert, G. Duckeck, A. A. Carter, J. T.M. Chrin, D. Strom, G. T. Zorn, H. M. Bosch, T. Kawamoto, Wolfram Dietrich Zeuner, S. Orito, John H. Schwarz, D. A. Hinshaw, R. Mir, H. Oh, M. J. Oreglia, J. R. Carter, G. N. Patrick, J. von Krogh, P. Ashton, Dave Robinson, S. Schreiber, T. J. McMahon, R. K. Carnegie, J. A. Wilson, and W. Schappert
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, Electron–positron annihilation, High Energy Physics::Phenomenology, Scalar (physics), Nuclear physics, High Energy Physics::Experiment, Leptoquark, Neutrino, Particle Physics - Experiment, Storage ring, Lepton
Abstract: A search for scalar leptoquarks has been performed with data from the OPAL detector at the e+e− storage ring LEP. In a data sample corresponding to an integrated luminosity of 6.3 pb−1 no evidence for leptoquark production was observed where the leptoquark decays into a quark and either a charged lepton (e, μ, τ) or a neutrino. An upper limit of 1.7 pb on the production cross section for leptoquarks is obtainedassuming a branching ratio of 50% for the decay of the leptoquark into the channels with a charged lepton. Lower limits on the leptoquark mass between 41.4 and 46.4 GeV/c2 at 95% CL are obtained, depending on the effecte SU(2) × U(1) invariant couplings assigned to the leptoquark.
Published: 1991

15. A study of - in Z0 decays

Author: Gideon Bella, H. J. Burckhart, Jacqueline Batley, M. Jobes, F. Odorici, R. Mir, U. Binder, H. Oh, H. O. Ogren, Michael Dittmar, C. M. Hawkes, M. Cooper, Daniel Lellouch, F. S. Merritt, G. Yekutieli, R. F. McGowan, Christoph Geich-Gimbel, Silvia Arcelli, M. M. Deninno, Tohru Takeshita, P. Scharff-Hansen, J. Kroll, F. X. Gentit, J. E. Conboy, Paul Kyberd, M. Ogg, R. Shypit, Takehiko Mori, T. Mouthuy, F. K. Loebinger, M. W. Moss, P. Igo-Kemenes, A. Pouladdej, G. Maringer, M. J. Oreglia, H. Jeremie, C. Moisan, J. P. Walker, F. Lamarche, R. E. Hughes-Jones, N. C. Wood, U. Maur, W. J. Larson, J. D. Hobbs, Georges Azuelos, P. M. Hattersley, H. Mes, M. W. Redmond, R. J. Hemingway, I. P. Duerdoth, R. Van Kooten, G. G. Hanson, P. Singh, J. W. Gary, A. Rollnik, K. W. Bell, P. Teixeira-Dias, G. A. Snow, C. P. Ward, A. A. Carter, G. Giacomelli, Max Weber, P. E.L. Clarke, M. Sprotson, J. R. Carter, A. M. Rossi, K. J. Anderson, Misao Sasaki, T. Behnke, R. W. L. Jones, M. H. Lehto, L. Janissen, B. C. Shen, P. Jovanovic, A. M. Smith, G. N. Patrick, E.J. Prebys, Austin Ball, Kiyotomo Kawagoe, T. Tsukamoto, D. E. Klem, S. Levegrün, D. Menszner, R. Sobie, G. Vasseur, B. Lorazo, S. Wotton, P. Le Du, W. G. Scott, M. S. Dixit, Frans Meijers, G. Beaudoin, M. Jimack, John Allison, H. Kreutzmann, B. Panzer-Steindel, D. Hochman, N. J. Thackray, I. J. Bloodworth, A. Simon, Otmar Biebel, E. K. U. Gross, A. P. Wagner, Alessandro Montanari, Gunter Quast, M. Weymann, K. Stephens, J. M. Roney, N. I. Geddes, R. Yaari, D. G. Charlton, J. R. McNutt, A. Gaidot, M. Couch, M. F. Turner, M. Kuwano, R. Kowalewski, M. Geerts, J. P. Martin, S. Bethke, B. B. Brabson, Shlomo Dado, C. Fukunaga, R. Humbert, Marco Cuffiani, M. Settles, H. E. Stier, John Hill, B. Poli, D. G. Fong, J. Gascon, X. C. Lou, S. De Jong, H. von der Schmitt, S. Schreiber, J. T.M. Chrin, M. J. Losty, G. Duckeck, T. J. McMahon, J. D. Gillies, P. G. Estabrooks, R. G. Kellogg, P. Routenburg, P. G. Murphy, D. Strom, V. Gibson, B. P. O'Neill, J. Hart, H. M. Fischer, T. Kawamoto, A. Michelini, Giora Mikenberg, G. T. Zorn, John Baines, R. J. Barlow, A. Astbury, P. M. Watkins, P. Debu, G. W. Wilson, Marcello Mannelli, R. K. Carnegie, Stefano Marcellini, A. Dieckmann, S. Orito, John H. Schwarz, J. Hagemann, D. Karlen, J. A. Wilson, D. C. Imrie, Y. Yang, C. Y. Chang, M. Fincke-Keeler, H. M. Bosch, Wolfram Dietrich Zeuner, Andris Skuja, S. A. Robins, I. Wingerter, J. L. Pinfold, O. Ganel, Tetsuro Mashimo, J. G. Layter, P. Taras, A. J. Martin, D. R. Ward, C. J. Oram, P. F. Harrison, Mitsuaki Nozaki, K. Riles, G. P. Siroli, W. Schappert, W. Gorn, J. Mildenberger, S. Bougerolle, G. A. Bahan, W. J. Collins, Harold Nguyen, S. Sanghera, Stephen Lloyd, J. M. Lorah, Erez Etzion, D. E. Plane, G. D. Lafferty, Gareth J. Barker, C. K. Hargrove, B. Holl, D. A. Hinshaw, Shlomit Tarem, W. Mohr, P. Pfister, Stephen Hillier, G. M. Dallavalle, G. Eckerlin, T. J. Smith, Phillip Allport, P. A. Elcombe, S. Rossberg, T. W. Pritchard, H. Takeda, I. Zacharov, J. C. Armitage, R. P. Middleton, F. G. Oakham, Alan Watson, D. L. Rees, D. J.P. Dumas, J. Becker, P. Mättig, S. J. Pawley, Horst Breuker, G. J. VanDalen, B. Nellen, P. Leblanc, M. Hansroul, W. R. Gibson, C. Ho, Claus Kleinwort, L. Köpke, R. J. Homer, D. Axen, P. Schenk, A. D. Schaile, A. Beck, A. Jawahery, Gideon Alexander, Paolo Capiluppi, G. Tysarczyk-Niemeyer, E. Heflin, M. J. Goodrick, I. Cohen, R. M. Brown, Lorne Levinson, N. Wermes, B. W. Kennedy, Ehud Duchovni, D. R. Rust, H. Ihssen, S. W. Gensler, T. Kobayashi, P. Lennert, J. Banks, S. Weisz, R. D. Heuer, Fabrizio Fabbri, D. Van den plas, J. von Krogh, Peter Sherwood, R. W. Springer, J. Ludwig, K. Runge, P. Bock, P. Ashton, Dave Robinson, Sachio Komamiya, V. H. Winterer, S. R. Hou, T. P. Kokott, Rene Brun, N. K. Watson, S. W. O'Neale, Peter R Hobson, M. Hauschild, P. Paschievici, P R Poffenberger, D. J. Miller, H. Przysiezniak, O. Runolfsson, C. Wahl, L. Lessard, Claudio Grandi, P. W. Jeffreys, P. S. Wells, A. M. Lee, C. J. Virtue, C. P. Howarth, Terry Richard Wyatt, J. E. Pilcher, M. Coupland, O. Schaile, M. A. Whalley, A. Buijs, Richard Keeler, Claude Leroy, J. P. Pansart, and C. Milstene
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Meson, Branching fraction, High Energy Physics::Lattice, Electron–positron annihilation, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, Elementary particle, Nuclear physics, Pair production, Pion, High Energy Physics::Experiment, Nuclear Experiment
Abstract: In this paper an investigation of the production of D ∗ ± mesons produced in e + e − collisions at energies around the Z 0 pole is presented. Based on 115 D ∗ ± mesons with x D∗  2E D ∗ /E cm > 0.2 the properties of D ∗ mesons produced in the reaction Z 0 → c c are studied. Fixing the yield and the fragmentation function of bottom quarks to the values obtained at LEP using lepton tags, and average energy fraction of the D ∗ ± mesons from primary charmed quarks of 〈x c → D ∗ 〉 = 0.52 ± 0.03 +- 0.01 is found and Γ z 0 →c c = (323 ± 61 ± 35) MeV is determined. The first error is the combined statistical and systematic error from this experiment, and the second the total error from other sources.
Published: 1991

16. A search for multiplicity fluctuations in high energy nucleus-nucleus collisions

Author: F. Lamarche, M. Kazuno, Kimio Niwa, N. DiGiacomo, W.E. Sondheim, Vincent Hedberg, Serge Smirnov, S. Di Liberto, Sverker Johansson, Ulf Mjörnmark, R. Heifetz, G. Beaudoin, S. Muraviev, N. Armenise, A.C. Breslin, Motoaki Miyanishi, S. Nilsson, M. Sekimoto, Paolo Giubellino, F. Piuz, Piergiorgio Cerello, P. Yepes, Matthias Neubert, Makoto Kobayashi, H. Beker, Kazuhito Tsukagoshi, D. Bettoni, B. Sellden, H. Shibuya, Gilbert Poulard, M. Clemen, M. Murray, H. Sletten, Y. Sirois, D.H. Davis, H. En'yo, G. London, Torsten Paul Ake Åkesson, B. Erlandsson, M. Nomura, B. A. Dolgoshein, Ulrich Goerlach, M. Nakamura, M. T. Muciaccia, Y. Umezawa, D. Lissauer, Göran Jarlskog, Franco Meddi, M. A. Mazzoni, R. C. E. Devenish, Francois Corriveau, P. L. McGaughey, J. R. Dodd, H. Tajima, B. V. Jacak, D.N. Tovee, B. Lörstad, M. J. Price, Richard Wigmans, C. Leroy, C.W. Fabjan, H. Kitamura, G. Romano, G. Rosa, A. L. S. Angelis, Y. M. Park, V. Sidorov, Peter Glassel, P. Aubry, N. Ushida, Venetios Polychronakos, I. Stumer, Hans Henrik Thodberg, J. Sunier, G. Baroni, I. Tserruya, H. Atherton, H. Kraner, A. Holscher, R. Haglund, S. Sartori, B. Collick, I. Blevis, M. J. Esten, M. L. McCubbin, K. Dederichs, L. A. Hamel, Yona Oren, L. Ramello, G. Grella, P. Depommier, Odette Benary, S. Nakanishi, E. Mazzucato, J. M. Beaulieu, W. E. Cleland, S. Dell'Uomo, A. Lounis, A. Gaidot, H. W. Van Hecke, A. Marzari-Chiesa, J. A. Thompson, G. Vasseur, H. W. Bartels, Peter Fischer, L. Šándor, K. Hoshino, Shigeki Aoki, J. P. Pansart, Alevtina Shmeleva, Massimo Masera, Jurgen Schukraft, Kazuma Nakazawa, D.C. Rahm, H. J. Specht, S. Dagan, Koichi Kodama, N. A. McCubbin, S. Almehed, S. Simone, Vladimir Tikhomirov, T. Ishigami, L. Olsen, V. Bisi, M. Seman, Y. Kobayashi, A. Drees, V. Kroh, A. Pfeiffer, H. Bøggild, K. Niu, J. Soltani, Rob Veenhof, Z. Fraenkel, and S. Watanabe
Subjects: Physics, Nuclear and High Energy Physics, High energy, HELIOS, Ioni ultrarelativistici, Heavy Ion Physics, Particle Physics, Nuclear physics, Transverse plane, medicine.anatomical_structure, heavy ions, multiplicity flictuations, medicine, Multiplicity (chemistry), Atomic physics, Nuclear Experiment, Nucleon, Nucleus, Particle Physics - Experiment
Abstract: A search for non-statistical fluctuations was performed in 200 GeV per nucleon oxygen and sulphur ion-emulsion interactions selected by a high transverse energy trigger. No clear signal of dynamical correlations or of unusual fluctuations was found.
Published: 1990

17. Evaluation dosimetrique d’un nouveau systeme radiographique a basse irradiation

Author: G. Charron, M.C. Miron, H. Labelle, G. Beaudoin, S. Parent, J. Dubois, and Sylvain Deschênes
Subjects: Radiological and Ultrasound Technology, Radiology, Nuclear Medicine and imaging
Abstract: Objectifs Comparer la dosimetrie des systemes radiographiques EOS (Biospace, Paris, France) et Fuji FCR 7501S. Materiels et methodes Des facteurs techniques equivalents pour les systemes ont ete definis par une etude des rapports signal a bruit sur fantome. Lors d’une etude clinique, cinquante patients scoliotiques ont ete radiographies a quinze minutes d’intervalle avec les deux systemes. Pour chaque examen, treize dosimetres ont evalue la dose a la peau pres de zones radiosensibles. Quatre experts (radiologues et orthopedistes) ont ensuite evalue a l’aveugle la qualite des images via un questionnaire sur la visibilite de structures anatomiques d’interet. Resultats L’irradiation moyenne incidente a la peau du patient est reduite avec EOS dans des proportions pouvant atteindre jusqu’a 800 %. Ces doses varient de 202 et 303 microGrays pour EOS et de 586 et 2 467 microGrays pour Fuji. L’analyse comparative des scores de visibilite montre une equivalence pour les deux modalites dans 61,3 % des cas et une visibilite superieure avec EOS dans 33,1 %. Conclusion L’etude montre une reduction de dose majeure en faveur du nouveau systeme pour une visibilite des structures egale ou superieure dans 94,4 % des cas. L’analyse des efficacites quantiques de detection des systemes est en cours.
Published: 2008

18. In vivo biostability of four types of arterial grafts with impervious walls; their haemodynamic and pathological characteristics

Author: R. Paynter, A.E. Marble, G Beaudoin, Paul-Emile Roy, Robert Guidoin, R. Schmitter, Jamal Charara, and C. Fortin
Subjects: Male, medicine.medical_specialty, Surface Properties, medicine.medical_treatment, Biophysics, Hemodynamics, Pannus, Aorta, Thoracic, Anastomosis, Prosthesis, Dogs, medicine.artery, Animals, Medicine, Thoracic aorta, Bioprosthesis, Wound Healing, Heterografts, business.industry, Anastomosis, Surgical, Histology, Arteries, medicine.disease, Blood Vessel Prosthesis, Surgery, Endothelial stem cell, Female, Stress, Mechanical, business, Compliance
Abstract: We describe the haemodynamic and pathological characteristics of four types of impervious arterial prostheses, two alloplastic (Milrathane ® and Gore-Tex ® ), and two chemically processed bovine heterografts (Solcograft ® and Solco P ® ). They were implanted in the thoracic aortae of dogs for durations of 24 hours, 48 hours, one weeks, two weeks, one month, three months and six months. Haemodynamic analyses showed no relation between the shear rate index, I· Y , and compliance, C D . The observed shear rates are 6.5 times lower than those likely to damage the endothelial cell layer. Macroscopic and microscopic observations of explanted grafts showed the presence of obstructive thrombi at the anastomoses of Mitrathane ® grafts as early as one week. Gore-Tex ® grafts develop in the area of anastomoses parietal-thrombi which reorganize and become covered with pseudo-endothelial cells. The bovine heterografts show a similar behaviour. However, whereas Solcograft ® has an irregular thin wall, Solco P ® had improved characteristics except in the graft implanted for three months which demonstrated some manufacturing weaknesses. Both types showed the development of anastomotic pannus covered with endothelial-like cells. All grafts, whether alloplastic or chemically processed, suffered from an absence of healing of the middle part of the prosthesis. The cause of this problem will be found in the analysis of the biochemical and enzymatic reactations between the material used and its physiological surrounding.
Published: 1989

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18 results on '"G. Beaudoin"'

1. Updated measurement of the τ lifetime

2. Measurement of the time dependence of mixing using a jet charge technique

3. Measurement of the τ− → h− π0ντ and τ− → h− ⩾ 2π0ντ branching ratios

4. Measurement of the B0 and B+ lifetimes

5. Evidence for chain-like production of strange baryon pairs in jets

6. A measurement of (892)± production in hadronic Z0 decays

7. A study of the electric charge distributions of quark and gluon jets in hadronic Z0 decays

8. A measurement of strange baryon production in hadronic Z0 decays

9. A study of two-particle momentum correlations in hadronic Z0 decays

10. Evidence for b-flavoured baryon production in Z0 decays at LEP

11. Test of CP-invariance in e+e−→Z0→τ+τ− and a limit on the weak dipole moment of the τ lepton

12. Measurement of B00 mixing in hadronic Z0 decays

13. An improved measuremebts of αS (MZ0) using energy correlations with the OPAL detector at LEP

14. A search for scalar leptoquarks in Z0 decays

15. A study of - in Z0 decays

16. A search for multiplicity fluctuations in high energy nucleus-nucleus collisions

17. Evaluation dosimetrique d’un nouveau systeme radiographique a basse irradiation

18. In vivo biostability of four types of arterial grafts with impervious walls; their haemodynamic and pathological characteristics

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