Author: "M. Foucher" - Searchworks@Jio Institute Digital Library Search Results

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1. COVID-19 vaccines: the importance of transparency and fact-based education

Author: Juan Garcia Burgos, Zvi Teitelbaum, Joop M. A. van Gerven, Andrew J. Webb, Adam F. Cohen, H. Flore, Anthonius de Boer, Ron A. M. Foucher, Serge Cremers, Willem van Eden, Health Care Governance (HCG), and Virology
Subjects: Pharmacology, 2019-20 coronavirus outbreak, Clinical Trials as Topic, COVID-19 Vaccines, Coronavirus disease 2019 (COVID-19), business.industry, Immunization Programs, Information Dissemination, SARS-CoV-2, Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), COVID-19, Public relations, Transparency (behavior), Mass Vaccination, Immunogenicity, Vaccine, Editorial, Drug Development, SDG 3 - Good Health and Well-being, Taverne, Animals, Humans, Mass vaccination, Pharmacology (medical), Business, Patient Safety
Published: 2020

2. Cancers de l’hypopharynx T1-T2 « N0 » traités par chirurgie exclusive. Étude GETTEC

Author: Alain Cosmidis, Pierre-Olivier Vedrine, D. de Raucourt, Jean-Pierre Rame, Bruno Toussaint, M. Foucher, Gilles Poissonnet, and Olivier Dassonville
Subjects: Gynecology, Early-stage cancer, medicine.medical_specialty, Otorhinolaryngology, business.industry, Medicine, Surgery, business, Surgical treatment, Hypopharynx cancer
Abstract: Resume Objectif Estimer si la chirurgie exclusive dans le traitement des cancers precoces de l’hypopharynx peut donner des resultats identiques, voire meilleurs en termes de survie et de controle local que la radiotherapie. Methodes Quarante-cinq patients ont ete operes de 1991 a 2004. Quatre patients ont ete operes par voie endoscopique et 41 par pharyngolaryngectomie partielle. Quarante-trois patients ont eu un evidement ganglionnaire. Resultats La survie globale a un, trois et cinq ans etait de 100, 95 et 75 %. Le taux de controle locoregional a un, trois et cinq ans etait de 93, 88 et 82 % et etait influence par la presence de dysplasie sur les marges de resection ( p = 0,027). Les evenements carcinologiques observes ont ete cinq recidives locales, deux recidives ganglionnaires, dix secondes localisations et deux evolutions metastatiques. Cinq recidives locoregionales sur sept ont pu etre controlees par un traitement de rattrapage. Conclusion La chirurgie exclusive donne des resultats pleinement satisfaisants en termes de survie et de controle locoregional. Face a une recidive, elle permet d’operer des patients en territoire non irradie avec une diminution de la morbidite et de la mortalite et avec de meilleurs resultats. Ces resultats doivent etre confirmes par une etude randomisee.
Published: 2009

3. Search for scalar top and scalar bottom quarks at $\sqrt{s}$ = 183 GeV at LEP

Author: S. Petzold, W. J. McDonald, B. C. Shen, Tetsuro Mashimo, Matthias Schröder, K. Nagai, K. Stephens, R. Bartoldus, Siegfried Bethke, A. K. Honma, W. G. Scott, M. Thiergen, I. Nakamura, H. O. Ogren, W. Gorn, Christoph Geich-Gimbel, D. R. Rust, D. Glenzinski, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, V. Gibson, A. M. Lee, E. von Törne, S. Yamashita, P. Igo-Kemenes, K. Ishii, H. Jeremie, Vakhtang Kartvelishvili, T. R. Junk, J. E. Conboy, A. Fürtjes, I. Trigger, D. R. Ward, T. Kress, R. W. Springer, R. Van Kooten, M. Boutemeur, F. S. Merritt, S. Braibant, Georges Azuelos, E. Tsur, A. D. Schaile, Gabriella Pasztor, J. Bechtluft, J. A. McKenna, O. Schaile, M. Verzocchi, K. W. Bell, S. B. Anderson, P. Szymanski, J. Pálinkás, M. Schumacher, F. Wäckerle, E. Lefebvre, G. Yekutieli, E. do Couto e Silva, S. Robertson, Gregor Herten, J. C. Hill, U. Jost, R. Mir, R. Hawkings, B. Wilkens, D. M. Gingrich, Sven Menke, J. Lauber, S. D. Talbot, D. Eatough, A. A. Carter, Ron Folman, F. Odorici, G. A. Snow, C. P. Ward, C. Hartmann, D. E. Plane, J. E. Pilcher, R. Lahmann, Stephen Hillier, Stan Bentvelsen, G. M. Dallavalle, S. Söldner-Rembold, L. Brigliadori, U. Müller, A. J. Martin, D. C. Imrie, P. Utzat, U. Ruppel, N. J. Oldershaw, John Allison, G. P. Siroli, P. G. Estabrooks, R. K. Keeler, M. R. Ingram, Christoph Schwick, H. M. Fischer, N. K. Watson, P. M. Watkins, W. R. Gibson, J. M. Roney, C. K. Hargrove, M. Fanti, B. T. Bouwens, Daniele Bonacorsi, R. G. Kellogg, James Pinfold, R. Perez-Ochoa, D. G. Fong, J. Gascon, J. Letts, Gideon Alexander, Paolo Capiluppi, Kiyotomo Kawagoe, Claire Shepherd-Themistocleous, R. M. Brown, Lorne Levinson, Csaba Hajdu, Robert McPherson, G. W. Wilson, P. S. Wells, V. Zacek, Richard Teuscher, Stefano Marcellini, A. Skillman, A. S. Turcot, M. Hauschild, K. Sachs, Mathieu Doucet, Tara Shears, R. D. Heuer, Fabrizio Fabbri, F. Fiedler, J. von Krogh, C. Markus, A. A. Faust, H. Mes, I. P. Duerdoth, Terry Richard Wyatt, Shlomo Dado, J. W. Gary, P. A. Hart, J. Schieck, D. S. Koetke, Stefan Kluth, Marcello Mannelli, Otmar Biebel, Silvia Arcelli, J. E. Bloomer, G. T. Jones, E. H. Vokurka, K. R. Hossain, T. Behnke, Satoshi Mihara, L. A. del Pozo, P. Scharff-Hansen, W. Mohr, Shlomit Tarem, S. Baumann, P. Hüntemeyer, Reda Tafirout, Klaus Kurt Desch, T. J. McMahon, M. J. Pearce, F. G. Oakham, Giora Mikenberg, B. Schmitt, M. Kolrep, B. Stockhausen, Paul Kyberd, E. A. Mckigney, A. Macchiolo, E. L. Barberio, R. K. Carnegie, A. Posthaus, D. Chrisman, G. D. Long, F. K. Loebinger, Hans-Christian Schultz-Coulon, M. Herndon, Volker Blobel, Randall Sobie, M. Gruwé, M. Bobinski, P. I. Kayal, G. D. Lafferty, C. M. Hawkes, W. P. Lai, J. A. Wilson, A. M. Smith, C. Dallapiccola, J. Steuerer, Ivor Fleck, Richard Nisius, S. W. O'Neale, Guenter Duckeck, D. M. Strom, K. J. Anderson, Marco Cuffiani, Joleen Pater, Norbert Wermes, Sherry Towers, T. Kawamoto, D. Lazic, M. A. Thomson, A. Klier, E. K. U. Gross, N. Altekamp, H. Voss, Stephen Lloyd, R. Rylko, R. Giacomelli, S. Orito, O. C. Cooke, P. Pfeifenschneider, M. Sproston, D. I. Futyan, R. J. Barlow, D. J. Miller, J. Goldberg, M. Hapke, B. Nellen, A. Oh, A. Macpherson, N. I. Geddes, Michael Hildreth, J. Patt, P. Poffenberger, D. E. Hutchcroft, André Schöning, Ehud Duchovni, N. L. Rodning, M. J. Oreglia, H. G. Evans, B. Poli, M. J. Goodrick, R. Howard, J. S. White, I. Cohen, S. A. Robins, D. L. Rees, J. R. Carter, G. N. Patrick, M. Jimack, Paolo Giacomelli, M. Hansroul, Gunter Wolf, K. Ackerstaff, D. Rigby, R. J. Hemingway, A. Joly, F. Scharf, German Martinez, Beatrix Dienes, S. M. Gascon-Shotkin, C. Burgard, C. Sbarra, R. J. Homer, A. Michelini, Matthew Evans, A. M. Rossi, C. Y. Chang, P. Taras, Michael Kobel, Allen Mincer, Satoshi Tanaka, T. Kobayashi, B. W. Kennedy, Julie Kirk, Ekg Sarkisyan, P. Jovanovic, P. W. Jeffreys, Austin Ball, Peter Krieger, P. Vikas, Alessandro Montanari, D. Lanske, M. Fierro, J. E.G. Edwards, S. R. Lautenschlager, H. A. Neal, O. Runolfsson, C. Beeston, Claudio Grandi, G. G. Hanson, G. Giacomelli, M. S. Dixit, Frans Meijers, A. Biguzzi, A. Rooke, J. G. Layter, P. E.L. Clarke, M. K. Jones, J. P. Martin, S. De Jong, A. N. Bell, P. Gagnon, A. Sittler, Peter Schleper, Zoltan Laszlo Trocsanyi, S. D. Bird, P. Schenk, D. Axen, A. Jawahery, Peter Sherwood, Alexander Wagner, J. Ludwig, K. Runge, P. Bock, Gideon Bella, H. J. Burckhart, Jacqueline Batley, Sachio Komamiya, Theodoros Geralis, E. Ros, A. T. Watson, I. J. Bloodworth, C. R. Jones, T. P. Kokott, Dave Charlton, R. Bürgin, T. Saeki, Yoram Rozen, R. Davis, M. Foucher, J. Grunhaus, D. Karlen, M. F. Turner-Watson, M. Morii, Peter R Hobson, Stefan Schmitt, D. Zer-Zion, P. Routenburg, P. Mättig, Shoji Asai, Daniel Lellouch, Takehiko Mori, K. Stoll, and Andris Skuja
Subjects: Physics, Stop squark, Top quark, Particle physics, Physics and Astronomy (miscellaneous), High Energy Physics::Lattice, High Energy Physics::Phenomenology, Top quark condensate, Bottom quark, Nuclear physics, Quark star, Neutralino, Up quark, High Energy Physics::Experiment, B meson, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment
Abstract: Searches for a scalar top quark and a scalar bottom quark have been performed using a total data sample of 56.8 pb-1 at a centre-of-mass energy of 183 GeV collected with the OPAL detector at LEP. No candidate events were observed. Combining this result with those obtained at lower centre-of-mass energies, the 95% C.L. lower limit on the scalar top quark mass is 85.0 GeV if the mixing angle between the supersymmetric partners of the left- and right-handed states of the top quark is zero. The lower limit is 81.3 GeV, even if the scalar top quark decouples from the Z boson. These limits were obtained assuming that the scalar top quark decays into a charm quark and the lightest neutralino, and that the mass difference between the scalar top quark and the lightest neutralino is larger than 10 GeV. Assuming a relatively light scalar neutrino, The complementary decay mode of the scalar top quark in which it decays into a bottom quark, a charged lepton and a scalar neutrino was also studied. From a similar analysis, a mass limit on the light scalar bottom quark was set at 82.7 GeV for a mass difference between the scalar bottom quark and the lightest neutralino larger than 7 GeV, and at 84.0 GeV for the mass difference larger 10 GeV and the lightest neutralino heavier than 30 GeV. These limits were obtained assuming that the scalar bottom quark decays into a bottom quark and the lightest neutralino, and that a mixing angle between the supersymmetric partners of the left- and right-handed states of the bottom quark is zero. Searches for a scalar top quark and a scalar bottom quark have been performed using a total data sample of 56.8 pb-1 at a centre-of-mass energy of 183 GeV collected with the OPAL detector at LEP. No candidate events were observed. Combining this result with those obtained at lower centre-of-mass energies, the 95% C.L. lower limit on the scalar top quark mass is 85.0 GeV if the mixing angle between the supersymmetric partners of the left- and right-handed states of the top quark is zero. The lower limit is 81.3 GeV, even if the scalar top quark decouples from the Z boson. These limits were obtained assuming that the scalar top quark decays into a charm quark and the lightest neutralino, and that the mass difference between the scalar top quark and the lightest neutralino is larger than 10 GeV. Assuming a relatively light scalar neutrino, The complementary decay mode of the scalar top quark in which it decays into a bottom quark, a charged lepton and a scalar neutrino was also studied. From a similar analysis, a mass limit on the light scalar bottom quark was set at 82.7 GeV for a mass difference between the scalar bottom quark and the lightest neutralino larger than 7 GeV, and at 84.0 GeV for the mass difference larger 10 GeV and the lightest neutralino heavier than 30 GeV. These limits were obtained assuming that the scalar bottom quark decays into a bottom quark and the lightest neutralino, and that a mixing angle between the supersymmetric partners of the left- and right-handed states of the bottom quark is zero.
Published: 1999

4. Investigation of CP violation in $\mathrm{B^0} \rightarrow \mathrm{J}/\psi \mathrm{K^0_S}$ decays at LEP

Author: G. W. Wilson, Richard Teuscher, A. S. Turcot, M. Hauschild, C. Markopoulos, F. Fiedler, A. Biguzzi, A. Rooke, R. Bartoldus, A. Macpherson, C. Markus, I. J. Bloodworth, J. G. Layter, H. O. Ogren, R. Kowalewski, Christoph Geich-Gimbel, Yoram Rozen, M. Foucher, R. Davis, E. H. Vokurka, M. Kolrep, K. Stephens, H. M. Fischer, R. Howard, J. S. White, Gideon Alexander, Junichi Kanzaki, D. Karlen, M. Schumacher, E. Lefebvre, Paolo Capiluppi, P. G. Estabrooks, R. K. Keeler, A. Michelini, Vakhtang Kartvelishvili, P. Gagnon, F. Odorici, M. Fierro, V. Gibson, Randall Sobie, N. K. Watson, P. M. Watkins, Daniel Lellouch, J. E. Conboy, A. Fürtjes, J. Letts, S. R. Lautenschlager, G. D. Lafferty, Stefan Schmitt, L. Brigliadori, Shoji Asai, Takehiko Mori, R. W. Springer, P. Mättig, V. Zacek, A. Sittler, T. R. Junk, H. A. Neal, Lutz Feld, G. G. Hanson, Peter Schleper, I. Trigger, O. Runolfsson, K. Sachs, Zoltan Laszlo Trocsanyi, R. L. Coxe, D. R. Ward, T. Kress, John Allison, Shlomo Dado, N. J. Oldershaw, C. Dallapiccola, J. Goldberg, Silvia Arcelli, G. Giacomelli, I. Lawson, U. Ruppel, A. Hocker, D. Chrisman, G. D. Long, Volker Blobel, M. Boutemeur, F. S. Merritt, Matthias Schröder, B. Nellen, S. Yamashita, P. Igo-Kemenes, Guenter Duckeck, A. De Roeck, K. Ishii, H. Jeremie, P. Scharff-Hansen, Claudio Grandi, P. S. Wells, M. F. Turner-Watson, Peter R Hobson, S. W. O'Neale, M. S. Dixit, Frans Meijers, Georges Azuelos, E. Tsur, Stephen Lloyd, M. Thiergen, Giora Mikenberg, Terry Richard Wyatt, S. F. Ashby, K. J. Anderson, M. Verzocchi, K. W. Bell, Ekg Sarkisyan, S. D. Bird, J. Pálinkás, S. B. Anderson, S. M. Gascon-Shotkin, P. Szymanski, R. G. Kellogg, D. Zer-Zion, S. Baumann, E. A. Mckigney, Raimund Ströhmer, P. Routenburg, P. W. Jeffreys, J. Bechtluft, J. A. McKenna, Ehud Duchovni, J. C. Hill, O. Schaile, M. Jimack, P. E.L. Clarke, M. K. Jones, J. P. Martin, W. P. Lai, H. G. Evans, A. M. Smith, Csaba Hajdu, M. J. Goodrick, I. Cohen, S. Robertson, P. Poffenberger, J. M. Roney, S. De Jong, D. I. Futyan, W. J. McDonald, Stefano Marcellini, Gregor Herten, B. C. Shen, A. D. Schaile, Gabriella Pasztor, P. Vannerem, D. Lui, Anna Macchiolo, Stan Bentvelsen, Christoph Rembser, Satoshi Mihara, J. Grunhaus, D. Axen, Ikuo Ueda, D. M. Strom, Sven Menke, A. Jawahery, N. Altekamp, H. Voss, P. Vikas, T. Kobayashi, Siegfried Bethke, A. K. Honma, K. Stoll, Matthew Evans, A. M. Rossi, G. A. Snow, C. P. Ward, D. Lanske, W. M. Sang, W. G. Scott, J. E. Pilcher, I. Nakamura, S. Söldner-Rembold, A. J. Martin, Andris Skuja, Beatrix Dienes, R. J. Barlow, S. Petzold, Sachio Komamiya, R VanKooten, Theodoros Geralis, Peter Sherwood, Erez Etzion, C. Y. Chang, C. K. Hargrove, D. Glenzinski, A. T. Watson, Tara Shears, Tetsuro Mashimo, P. Taras, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, P. A. Hart, Michael Kobel, D. J. Miller, T. P. Kokott, A. Joly, Stefan Kluth, Shlomit Tarem, Allen Mincer, Marcello Fanti, T. Saeki, Alexander Wagner, J. Ludwig, Julie Kirk, K. Runge, P. Bock, Alessandra Fanfani, N. I. Geddes, Michael Hildreth, C. Sbarra, J. Lauber, N. L. Rodning, B. Poli, W. Gorn, B. Stockhausen, Paul Kyberd, F. K. Loebinger, U. Jost, S. A. Robins, R. Mir, J. Steuerer, Ivor Fleck, R. Hawkings, Joleen Pater, A. Klier, S. D. Talbot, R. Giacomelli, A. Oh, K. Ackerstaff, D. Eatough, James Pinfold, R. Perez-Ochoa, D. G. Fong, F. G. Oakham, B. Schmitt, J. Gascon, E. L. Barberio, Paolo Giacomelli, M. Hansroul, R. J. Hemingway, B. W. Kennedy, C. Burgard, P. Jovanovic, Austin Ball, Peter Krieger, Alessandro Montanari, R. J. Homer, J. W. Gary, D. S. Koetke, O. C. Cooke, P. Pfeifenschneider, Marcello Mannelli, J. Patt, André Schöning, O. Sahr, M. A. Thomson, H. Mes, I. P. Duerdoth, S. Braibant, P. Hüntemeyer, E. K. U. Gross, M. Sproston, C. Hartmann, D. E. Plane, Stephen Hillier, G. M. Dallavalle, Reda Tafirout, Klaus Kurt Desch, E. Torrence, W. R. Gibson, T. J. McMahon, C. Couyoumtzelis, R. M. Brown, Lorne Levinson, A. Skillman, R. K. Carnegie, M. Herndon, M. Bobinski, J. A. Wilson, F. Scharf, T. Behnke, C. M. Hawkes, German Martinez, Richard Nisius, B. List, D. Lazic, Marco Cuffiani, Dave Charlton, Daniele Bonacorsi, Claire Shepherd-Themistocleous, F. Wäckerle, D. M. Gingrich, J. von Krogh, R. Bürgin, A. A. Faust, M. Gruwé, L. A. del Pozo, G. Yekutieli, Robert McPherson, Mathieu Doucet, R. D. Heuer, A. A. Carter, Ron Folman, Fabrizio Fabbri, K. Nagai, P. Utzat, D. R. Rust, Gideon Bella, J. Schieck, A. M. Lee, E. von Törne, H. J. Burckhart, Jacqueline Batley, W. Mohr, A. Posthaus, C. R. Jones, R. Lahmann, D. C. Imrie, G. P. Siroli, Otmar Biebel, Christoph Schwick, P. I. Kayal, Kiyotomo Kawagoe, Norbert Wermes, Sherry Towers, T. Kawamoto, S. Orito, K. R. Hossain, S. Betts, M. Hapke, D. E. Hutchcroft, M. J. Oreglia, J. R. Carter, and G. N. Patrick
Subjects: Physics, Nuclear physics, Particle physics, Physics and Astronomy (miscellaneous), media_common.quotation_subject, Electron–positron annihilation, Hadron, Detector, CP violation, Engineering (miscellaneous), Asymmetry, media_common, Standard Model
Abstract: An investigation of CP violation was performed using a total of 24 candidates for B0→J/ψK0SB0→J/ψKS0 decay, with a purity of about 60%. These events were selected from 4.4 million hadronic Z0Z0 decays recorded by the OPAL detector at LEP. An analysis procedure, involving techniques to reconstruct the proper decay times and tag the produced b-flavours, B0B0 or B¯0B¯0 , has been developed to allow a first direct study of the time dependent CP asymmetry that, in the Standard Model, is sin2βsin⁡2β . The result is where the first error is statistical and the second systematic. This result is used to determine probabilities for different values of sin2βsin⁡2β in the physical region from −1−1 to +1.
Published: 1998

5. Determination of the production rate of D*0 mesons and of the ratio V/(V+P) in $$Z^0 \to c\bar c$$ decays

Author: K. Ackerstaff, G. Alexander, J. Allison, N. Altekamp, K. J. Anderson, S. Anderson, S. Arcelli, S. Asai, S. F. Ashby, D. Axen, G. Azuelos, A. H. Ball, E. Barberio, R. J. Barlow, R. Bartoldus, J. R. Batley, S. Baumann, J. Bechtluft, T. Behnke, K. W. Bell, G. Bella, S. Bentvelsen, S. Bethke, S. Betts, O. Biebel, A. Biguzzi, S. D. Bird, V. Blobel, I. J. Bloodworth, M. Bobinski, P. Bock, D. Bonacorsi, M. Boutemeur, S. Braibant, L. Brigliadori, R. M. Brown, H. J. Burckhart, C. Burgard, R. Bürgin, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R.Carter, C. Y. Chang, D. G. Charlton, D. Chrisman, P. E. L. Clarke, I. Cohen, J. E. Conboy, O. C. Cooke, C. Couyoumtzelis, R. L. Coxe, M. Cuffiani, S. Dado, C. Dallapiccola, G. M. Dallavalle, R. Davis, S. De Jong, L. A. del Pozo, A. de Roeck, K. Desch, B. Dienes, M. S. Dixit, M. Doucet, E. Duchovni, G. Duckeck, I. P. Duerdoth, D. Eatough, P. G. Estabrooks, E. Etzion, H. G. Evans, M. Evans, F. Fabbri, A. Fanfani, M. Fanti, A. A. Faust, L. Feld, F. Fiedler, M. Fierro, H. M. Fischer, I. Fleck, R. Folman, D. G. Fong, M. Foucher, A. Fürtjes, D. I. Futyan, P. Gagnon, J. W. Gary, J. Gascon, S. M. Gascon-Shotkin, N. I. Geddes, C. Geich-Gimbel, T. Geralis, G. Giacomelli, P. Giacomelli, R. Giacomelli, V. Gibson, W. R. Gibson, D. M. Gingrich, D. Glenzinski, J. Goldberg, M. J. Goodrick, W. Gorn, C. Grandi, E. Gross, J. Grunhaus, M. Gruwé, C. Hajdu, G. G. Hanson, M. Hansroul, M. Hapke, C. K. Hargrove, P. A. Hart, C. Hartmann, M. Hauschild, C. M. Hawkes, R. Hawkings, R. J. Hemingway, M. Herndon, G. Herten, R. D. Heuer, M. D. Hildreth, J. C. Hill, S. J. Hillier, P. R. Hobson, A. Hocker, R. J. Homer, A. K. Honma, D. Horvath, K. R. Hossain, R. Howard, P. Hüntemeyer, D. E. Hutchcroft, P. Igo-Kemenes, D. C. Imrie, K. Ishii, A. Jawahery, P. W. Jeffreys, H. Jeremie, M. Jimack, A. Joly, C. R. Jones, M. Jones, U. Jost, P. Jovanovic, T. R. Junk, J. Kanzaki, D. Karlen, V. Kartvelishvili, K. Kawagoe, T. Kawamoto, P. I. Kayal, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, J. Kirk, A. Klier, S. Kluth, T. Kobayashi, M. Kobel, D. S. Koetke, T. P. Kokott, M. Kolrep, S. Komamiya, R. V. Kowalewski, T. Kress, P. Krieger, J. von Krogh, P. Kyberd, G. D. Lafferty, R. Lahmann, W. P. Lai, D. Lanske, J. Lauber, S. R. Lautenschlager, I. Lawson, J. G. Layter, D. Lazic, A. M. Lee, E. Lefebvre, D. Lellouch, J. Letts, L. Levinson, B. List, S. L. Lloyd, F. K. Loebinger, G. D. Long, M. J. Losty, J. Ludwig, D. Lui, A. Macchiolo, A. Macpherson, M. Mannelli, S. Marcellini, C. Markopoulos, C. Markus, A. J. Martin, J. P. Martin, G. Martinez, T. Mashimo, P. Mättig, W. J. McDonald, J. McKenna, E. A. Mckigney, T. J. McMahon, R. A. McPherson, F. Meijers, S. Menke, F. S. Merritt, H. Mes, J. Meyer, A. Michelini, S. Mihara, G. Mikenberg, D. J. Miller, A. Mincer, R. Mir, W. Mohr, A. Montanari, T. Mori, K. Nagai, I. Nakamura, H. A. Neal, B. Nellen, R. Nisius, S. W. O’Neale, F. G. Oakham, F. Odorici, H. O. Ogren, A. Oh, N. J. Oldershaw, M. J. Oreglia, S. Orito, J. Pálinkás, G. Pásztor, J. R. Pater, G. N. Patrick, J. Patt, R. Perez-Ochoa, S. Petzold, P. Pfeifenschneider, J. E. Pilcher, J. Pinfold, D. E. Plane, P. Poffenberger, B. Poli, A. Posthaus, C. Rembser, S. Robertson, S. A. Robins, N. Rodning, J. M. Roney, A. Rooke, A. M. Rossi, P. Routenburg, Y. Rozen, K. Runge, O. Runolfsson, U. Ruppel, D. R. Rust, K. Sachs, T. Saeki, O. Sahr, W. M. Sang, E. K. G. Sarkisyan, C. Sbarra, A. D. Schaile, O. Schaile, F. Scharf, P. Scharff-Hansen, J. Schieck, P. Schleper, B. Schmitt, S. Schmitt, A. Schöming, M. Schröder, M. Schumacher, C. Schwick, W. G. Scott, T. G. Shears, B. C. Shen, C. H. Shepherd-Themistocleous, P. Sherwood, G. P. Siroli, A. Sittler, A. Skillman, A. Skuja, A. M. Smith, G. A. Snow, R. Sobie, S. Söldner-Rembold, R. W. Springer, M. Sproston, K. Stephens, J. Steuerer, B. Stockhausen, K. Stoll, D. Strom, R. Ströhmer, P. Szymanski, R. Tafirout, S. D. Talbot, P. Taras, S. Tarem, R. Teuscher, M. Thiergen, M. A. Thomson, E. von Törne, E. Torrence, S. Towers, I. Trigger, Z. Trócsányi, E. Tsur, A. S. Turcot, M. F. Turner-Watson, I. Ueda, P. Utzat, R. Van Kooten, P. Vannerem, M. Verzocchi, P. Vikas, E. H. Vokurka, H. Voss, F. Wäckerle, A. Wagner, C. P. Ward, D. R. Ward, P. M. Watkins, A. T. Watson, N. K. Watson, P. S. Wells, N. Wermes, J. S. White, G. W. Wilson, J. A. Wilson, T. R. Wyatt, S. Yamashita, G. Yekutieli, V. Zacek, and D. Zer-Zion
Subjects: Systematic error, Physics, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Nuclear physics, Pseudoscalar, Excited state, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Production rate
Abstract: In e+e2212 collisions at centre-of-mass energies around 91 GeV, D*0 mesons have been reconstructed using data collected with the OPAL detector at LEP. The hadronisation fraction has been measured to be f(c→D*0)=0.218±0.054±0.045±0.007, where the errors correspond to the statistical and systematic errors specific to this analysis, and to systematic uncertainties from externally measured branching fractions, respectively. Together with previous OPAL measurements of the hadronisation fractions of other charmed mesons, this value is used to investigate the relative production of observed vector and pseudoscalar charmed mesons in $Z^0 \to c\bar c$ decays. The production ratio is determined to be PeffV = V/(V+P)=0.57±0.05. The relative primary production of vector and pseudoscalar mesons, Pvrim, is studied in the context of the production and decay of orbitally excited charmed resonances. The first measurement of the inclusive Ds*+ production rate in hadronic Z0 decays is presented.
Published: 1998

6. An upper limit on the anomalous magnetic moment of the τ lepton

Author: K. Ackerstaff, G. Alexander, J. Allison, N. Altekamp, K.J. Anderson, S. Anderson, S. Arcelli, S. Asai, S.F. Ashby, D. Axen, G. Azuelos, A.H. Ball, E. Barberio, R.J. Barlow, R. Bartoldus, J.R. Batley, S. Baumann, J. Bechtluft, T. Behnke, K.W. Bell, G. Bella, S. Bentvelsen, S. Bethke, S. Betts, O. Biebel, A. Biguzzi, S.D. Bird, V. Blobel, I.J. Bloodworth, M. Bobinski, P. Bock, D. Bonacorsi, M. Boutemeur, S. Braibant, L. Brigliadori, R.M. Brown, H.J. Burckhart, C. Burgard, R. Bürgin, P. Capiluppi, R.K. Carnegie, A.A. Carter, J.R. Carter, C.Y. Chang, D.G. Charlton, D. Chrisman, P.E.L. Clarke, I. Cohen, J.E. Conboy, O.C. Cooke, C. Couyoumtzelis, R.L. Coxe, M. Cuffiani, S. Dado, C. Dallapiccola, G.M. Dallavalle, R. Davis, S. De Jong, L.A. del Pozo, A. de Roeck, K. Desch, B. Dienes, M.S. Dixit, M. Doucet, E. Duchovni, G. Duckeck, I.P. Duerdoth, D. Eatough, P.G. Estabrooks, E. Etzion, H.G. Evans, M. Evans, F. Fabbri, A. Fanfani, M. Fanti, A.A. Faust, L. Feld, F. Fiedler, M. Fierro, H.M. Fischer, I. Fleck, R. Folman, D.G. Fong, M. Foucher, A. Fürtjes, D.I. Futyan, P. Gagnon, J.W. Gary, J. Gascon, S.M. Gascon-Shotkin, N.I. Geddes, C. Geich-Gimbel, T. Geralis, G. Giacomelli, P. Giacomelli, R. Giacomelli, V. Gibson, W.R. Gibson, D.M. Gingrich, D. Glenzinski, J. Goldberg, M.J. Goodrick, W. Gorn, C. Grandi, E. Gross, J. Grunhaus, M. Gruwé, C. Hajdu, G.G. Hanson, M. Hansroul, M. Hapke, C.K. Hargrove, P.A. Hart, C. Hartmann, M. Hauschild, C.M. Hawkes, R. Hawkings, R.J. Hemingway, M. Herndon, G. Herten, R.D. Heuer, M.D. Hildreth, J.C. Hill, S.J. Hillier, P.R. Hobson, A. Hocker, R.J. Homer, A.K. Honma, D. Horváth, K.R. Hossain, R. Howard, P. Hüntemeyer, D.E. Hutchcroft, P. Igo-Kemenes, D.C. Imrie, K. Ishii, A. Jawahery, P.W. Jeffreys, H. Jeremie, M. Jimack, A. Joly, C.R. Jones, M. Jones, U. Jost, P. Jovanovic, T.R. Junk, J. Kanzaki, D. Karlen, V. Kartvelishvili, K. Kawagoe, T. Kawamoto, P.I. Kayal, R.K. Keeler, R.G. Kellogg, B.W. Kennedy, J. Kirk, A. Klier, S. Kluth, T. Kobayashi, M. Kobel, D.S. Koetke, T.P. Kokott, M. Kolrep, S. Komamiya, R.V. Kowalewski, T. Kress, P. Krieger, J. von Krogh, P. Kyberd, G.D. Lafferty, R. Lahmann, W.P. Lai, D. Lanske, J. Lauber, S.R. Lautenschlager, I. Lawson, J.G. Layter, D. Lazic, A.M. Lee, E. Lefebvre, D. Lellouch, J. Letts, L. Levinson, B. List, S.L. Lloyd, F.K. Loebinger, G.D. Long, M.J. Losty, J. Ludwig, D. Lui, A. Macchiolo, A. Macpherson, M. Mannelli, S. Marcellini, C. Markopoulos, C. Markus, A.J. Martin, J.P. Martin, G. Martinez, T. Mashimo, P. Mättig, W.J. McDonald, J. McKenna, E.A. Mckigney, T.J. McMahon, R.A. McPherson, F. Meijers, S. Menke, F.S. Merritt, H. Mes, J. Meyer, A. Michelini, S. Mihara, G. Mikenberg, D.J. Miller, A. Mincer, R. Mir, W. Mohr, A. Montanari, T. Mori, K. Nagai, I. Nakamura, H.A. Neal, B. Nellen, R. Nisius, S.W. O'Neale, F.G. Oakham, F. Odorici, H.O. Ogren, A. Oh, N.J. Oldershaw, M.J. Oreglia, S. Orito, J. Pálinkás, G. Pásztor, J.R. Pater, G.N. Patrick, J. Patt, R. Perez-Ochoa, S. Petzold, P. Pfeifenschneider, J.E. Pilcher, J. Pinfold, D.E. Plane, P. Poffenberger, B. Poli, A. Posthaus, C. Rembser, S. Robertson, S.A. Robins, N. Rodning, J.M. Roney, A. Rooke, A.M. Rossi, P. Routenburg, Y. Rozen, K. Runge, O. Runolfsson, U. Ruppel, D.R. Rust, K. Sachs, T. Saeki, O. Sahr, W.M. Sang, E.K.G. Sarkisyan, C. Sbarra, A.D. Schaile, O. Schaile, F. Scharf, P. Scharff-Hansen, J. Schieck, P. Schleper, B. Schmitt, S. Schmitt, A. Schöning, M. Schröder, M. Schumacher, C. Schwick, W.G. Scott, T.G. Shears, B.C. Shen, C.H. Shepherd-Themistocleous, P. Sherwood, R.P.B. Sieberg, G.P. Siroli, A. Sittler, A. Skillman, A. Skuja, A.M. Smith, G.A. Snow, R. Sobie, S. Söldner-Rembold, R.W. Springer, M. Sproston, K. Stephens, J. Steuerer, B. Stockhausen, K. Stoll, D. Strom, R. Ströhmer, P. Szymanski, R. Tafirout, S.D. Talbot, P. Taras, S. Tarem, R. Teuscher, M. Thiergen, M.A. Thomson, E. von Törne, E. Torrence, S. Towers, I. Trigger, Z. Trócsányi, E. Tsur, A.S. Turcot, M.F. Turner-Watson, I. Ueda, P. Utzat, R. Van Kooten, P. Vannerem, M. Verzocchi, P. Vikas, E.H. Vokurka, H. Voss, F. Wäckerle, A. Wagner, C.P. Ward, D.R. Ward, P.M. Watkins, A.T. Watson, N.K. Watson, P.S. Wells, N. Wermes, J.S. White, G.W. Wilson, J.A. Wilson, T.R. Wyatt, S. Yamashita, G. Yekutieli, V. Zacek, and D. Zer-Zion
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Anomalous magnetic dipole moment, 010308 nuclear & particles physics, Form factor (quantum field theory), 01 natural sciences, High Energy Physics - Experiment, Dipole, 0103 physical sciences, Magnetic form factor, Radiative transfer, Vertex (curve), High Energy Physics::Experiment, Production (computer science), 010306 general physics, Particle Physics - Experiment, Lepton
Abstract: Using radiative Z^0 -> \tau^+ \tau^- \gamma events collected with the OPAL detector at LEP at \sqrt{s}= M_Z during 1990-95, a direct study of the electromagnetic current at the \tau\gamma vertex has been performed in terms of the anomalous magnetic form factor F_2 of the \tau lepton. The analysis is based on a data sample of 1429 e^+ e^- -> \tau^+ \tau^- \gamma events which are examined for a deviation from the expectation with F_2 = 0. From the non-observation of anomalous \tau^+ \tau^- \gamma production a limit of -0.068 < F_2 < 0.065 is obtained. This can also be interpreted as a limit on the electric dipole form factor F_3 as -3.8 x 10^-16 e-cm < eF_3 < 3.6 x 10^-16 e-cm. The above ranges are valid at the 95% confidence level., Comment: 20 pages, LaTeX, uses a4p.sty, 4 eps figures included, submitted to Phys. Lett. B
Published: 1998

7. Search for an excess in the production of four-jet events from e+e− collisions at =130–184 GeV

Author: K. Ackerstaff, G. Alexander, J. Allison, N. Altekamp, K.J. Anderson, S. Anderson, S. Arcelli, S. Asai, S.F. Ashby, D. Axen, G. Azuelos, A.H. Ball, E. Barberio, R.J. Barlow, R. Bartoldus, J.R. Batley, S. Baumann, J. Bechtluft, T. Behnke, K.W. Bell, G. Bella, S. Bentvelsen, S. Bethke, S. Betts, O. Biebel, A. Biguzzi, S.D. Bird, V. Blobel, I.J. Bloodworth, M. Bobinski, P. Bock, D. Bonacorsi, M. Boutemeur, S. Braibant, L. Brigliadori, R.M. Brown, H.J. Burckhart, C. Burgard, R. Bürgin, P. Capiluppi, R.K. Carnegie, A.A. Carter, J.R. Carter, C.Y. Chang, D.G. Charlton, D. Chrisman, P.E.L. Clarke, I. Cohen, J.E. Conboy, O.C. Cooke, C. Couyoumtzelis, R.L. Coxe, M. Cuffiani, S. Dado, C. Dallapiccola, G.M. Dallavalle, R. Davis, S. De Jong, L.A. del Pozo, A. de Roeck, K. Desch, B. Dienes, M.S. Dixit, M. Doucet, E. Duchovni, G. Duckeck, I.P. Duerdoth, D. Eatough, P.G. Estabrooks, E. Etzion, H.G. Evans, M. Evans, F. Fabbri, A. Fanfani, M. Fanti, A.A. Faust, L. Feld, F. Fiedler, M. Fierro, H.M. Fischer, I. Fleck, R. Folman, D.G. Fong, M. Foucher, A. Fürtjes, D.I. Futyan, P. Gagnon, J.W. Gary, J. Gascon, S.M. Gascon-Shotkin, N.I. Geddes, C. Geich-Gimbel, T. Geralis, G. Giacomelli, P. Giacomelli, R. Giacomelli, V. Gibson, W.R. Gibson, D.M. Gingrich, D. Glenzinski, J. Goldberg, M.J. Goodrick, W. Gorn, C. Grandi, E. Gross, J. Grunhaus, M. Gruwé, C. Hajdu, G.G. Hanson, M. Hansroul, M. Hapke, C.K. Hargrove, P.A. Hart, C. Hartmann, M. Hauschild, C.M. Hawkes, R. Hawkings, R.J. Hemingway, M. Herndon, G. Herten, R.D. Heuer, M.D. Hildreth, J.C. Hill, S.J. Hillier, P.R. Hobson, A. Hocker, R.J. Homer, A.K. Honma, D. Horváth, K.R. Hossain, R. Howard, P. Hüntemeyer, D.E. Hutchcroft, P. Igo-Kemenes, D.C. Imrie, K. Ishii, A. Jawahery, P.W. Jeffreys, H. Jeremie, M. Jimack, A. Joly, C.R. Jones, M. Jones, U. Jost, P. Jovanovic, T.R. Junk, J. Kanzaki, D. Karlen, V. Kartvelishvili, K. Kawagoe, T. Kawamoto, P.I. Kayal, R.K. Keeler, R.G. Kellogg, B.W. Kennedy, J. Kirk, A. Klier, S. Kluth, T. Kobayashi, M. Kobel, D.S. Koetke, T.P. Kokott, M. Kolrep, S. Komamiya, R.V. Kowalewski, T. Kress, P. Krieger, J. von Krogh, P. Kyberd, G.D. Lafferty, R. Lahmann, W.P. Lai, D. Lanske, J. Lauber, S.R. Lautenschlager, I. Lawson, J.G. Layter, D. Lazic, A.M. Lee, E. Lefebvre, D. Lellouch, J. Letts, L. Levinson, B. List, S.L. Lloyd, F.K. Loebinger, G.D. Long, M.J. Losty, J. Ludwig, D. Lui, A. Macchiolo, A. Macpherson, M. Mannelli, S. Marcellini, C. Markopoulos, C. Markus, A.J. Martin, J.P. Martin, G. Martinez, T. Mashimo, P. Mättig, W.J. McDonald, J. McKenna, E.A. Mckigney, T.J. McMahon, R.A. McPherson, F. Meijers, S. Menke, F.S. Merritt, H. Mes, J. Meyer, A. Michelini, S. Mihara, G. Mikenberg, D.J. Miller, A. Mincer, R. Mir, W. Mohr, A. Montanari, T. Mori, K. Nagai, I. Nakamura, H.A. Neal, B. Nellen, R. Nisius, S.W. O'Neale, F.G. Oakham, F. Odorici, H.O. Ogren, A. Oh, N.J. Oldershaw, M.J. Oreglia, S. Orito, J. Pálinkás, G. Pásztor, J.R. Pater, G.N. Patrick, J. Patt, R. Perez-Ochoa, S. Petzold, P. Pfeifenschneider, J.E. Pilcher, J. Pinfold, D.E. Plane, P. Poffenberger, B. Poli, A. Posthaus, C. Rembser, S. Robertson, S.A. Robins, N. Rodning, J.M. Roney, A. Rooke, A.M. Rossi, P. Routenburg, Y. Rozen, K. Runge, O. Runolfsson, U. Ruppel, D.R. Rust, K. Sachs, T. Saeki, O. Sahr, W.M. Sang, E.K.G. Sarkisyan, C. Sbarra, A.D. Schaile, O. Schaile, F. Scharf, P. Scharff-Hansen, J. Schieck, P. Schleper, B. Schmitt, S. Schmitt, A. Schöning, M. Schröder, M. Schumacher, C. Schwick, W.G. Scott, T.G. Shears, B.C. Shen, C.H. Shepherd-Themistocleous, P. Sherwood, G.P. Siroli, A. Sittler, A. Skillman, A. Skuja, A.M. Smith, G.A. Snow, R. Sobie, S. Söldner-Rembold, R.W. Springer, M. Sproston, K. Stephens, J. Steuerer, B. Stockhausen, K. Stoll, D. Strom, R. Ströhmer, P. Szymanski, R. Tafirout, S.D. Talbot, P. Taras, S. Tarem, R. Teuscher, M. Thiergen, M.A. Thomson, E. von Törne, E. Torrence, S. Towers, I. Trigger, Z. Trócsányi, E. Tsur, A.S. Turcot, M.F. Turner-Watson, I. Ueda, P. Utzat, R. Van Kooten, P. Vannerem, M. Verzocchi, P. Vikas, E.H. Vokurka, H. Voss, F. Wäckerle, A. Wagner, C.P. Ward, D.R. Ward, P.M. Watkins, A.T. Watson, N.K. Watson, P.S. Wells, N. Wermes, J.S. White, G.W. Wilson, J.A. Wilson, T.R. Wyatt, S. Yamashita, G. Yekutieli, V. Zacek, and D. Zer-Zion
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Aleph, 010308 nuclear & particles physics, FOS: Physical sciences, Jet (particle physics), 01 natural sciences, High Energy Physics - Experiment, Standard Model, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), 010306 general physics, Particle Physics - Experiment
Abstract: Events with four distinct jets from e^+e^- collisions, collected by the OPAL detector at centre-of-mass energies between 130 and 184 GeV, are analysed for a peak in the sum of dijet masses. This search is motivated by the ALEPH Collaboration's observation of a clear excess of events with dijet mass sums close to 105 GeV in data taken at centre-of-mass energies of 130 and 136 GeV in 1995. We have observed no significant excess of four-jet events compared to the Standard Model expectation for any dijet mass sum at any energy. Our observation is inconsistent with the excess observed by ALEPH in 1995. Upper limits are determined on the production cross-section as a function of the dijet mass sum., Comment: 24 pages, LaTeX, uses a4p.sty, 5 eps figures included, submitted to Physics Letters B
Published: 1998

8. Production of ${\rm f_0}(980)$ , ${\rm f}_2(1270)$ and $\phi(1020)$ in hadronic ${\rm Z}^0$ decay

Author: S. Betts, S. Yamashita, M. Hapke, J. Letts, P. Igo-Kemenes, D. E. Hutchcroft, K. Ishii, H. Jeremie, K. Sachs, A. Biguzzi, A. Rooke, J. G. Layter, Paolo Giacomelli, P. S. Wells, M. J. Oreglia, Shlomo Dado, O. Schaile, M. Hansroul, S. R. Lautenschlager, Terry Richard Wyatt, R. Lahmann, D. C. Imrie, L. Brigliadori, Sven Menke, Gideon Bella, T. Behnke, J. R. Carter, C. Burgard, G. N. Patrick, Stefan Schmitt, C. Hartmann, D. E. Plane, Stephen Hillier, G. M. Dallavalle, H. J. Burckhart, Jacqueline Batley, H. M. Fischer, R. J. Hemingway, Giora Mikenberg, S. F. Ashby, R. W. Springer, A. Macpherson, G. P. Siroli, Otmar Biebel, R. J. Homer, B. W. Kennedy, Christoph Schwick, A. Macchiolo, Tara Shears, P. Jovanovic, C. R. Jones, W. M. Sang, Austin Ball, O. Runolfsson, N. J. Oldershaw, J. Lauber, C. M. Hawkes, Peter Krieger, P. A. Hart, Kiyotomo Kawagoe, S. W. O'Neale, Georges Azuelos, Shoji Asai, G. G. Hanson, G. Yekutieli, E. Tsur, M. Boutemeur, F. S. Merritt, K. J. Anderson, M. Verzocchi, Richard Nisius, Alessandro Montanari, Richard Teuscher, A. D. Schaile, K. W. Bell, P. I. Kayal, J. Pálinkás, Gabriella Pasztor, H. A. Neal, R. Howard, M. F. Turner-Watson, J. S. White, A. S. Turcot, F. Fiedler, G. Giacomelli, J. C. Hill, B. List, I. Lawson, Daniel Lellouch, C. Y. Chang, W. J. McDonald, Dave Charlton, A. De Roeck, P. Vannerem, U. Ruppel, A. A. Carter, Marco Cuffiani, Norbert Wermes, B. C. Shen, Peter R Hobson, H. Mes, Ron Folman, P. Taras, G. W. Wilson, D. Zer-Zion, D. Lui, K. R. Hossain, R. Bürgin, Michael Kobel, Siegfried Bethke, A. K. Honma, M. Hauschild, C. Markopoulos, U. Jost, R. Mir, R. Hawkings, M. S. Dixit, I. P. Duerdoth, W. G. Scott, Sherry Towers, I. Nakamura, C. Markus, Frans Meijers, T. Kawamoto, Claudio Grandi, S. Braibant, P. Utzat, P. Routenburg, Matthias Schröder, E. H. Vokurka, P. E.L. Clarke, J. Grunhaus, Allen Mincer, M. K. Jones, Erez Etzion, Stefan Kluth, Shlomit Tarem, Takehiko Mori, P. Mättig, J. P. Martin, G. A. Snow, C. P. Ward, A. Joly, V. Zacek, D. Glenzinski, Dezso Horvath, M. J. Losty, S. Robertson, Julie Kirk, M. Thiergen, Gregor Herten, Jean-Arcady Meyer, Ikuo Ueda, D. M. Strom, S. Orito, J. Bechtluft, Raimund Ströhmer, Daniele Bonacorsi, R. L. Coxe, S. De Jong, P. G. Estabrooks, R. K. Keeler, N. K. Watson, P. M. Watkins, S. D. Talbot, F. G. Oakham, B. Schmitt, O. C. Cooke, Claire Shepherd-Themistocleous, P. Pfeifenschneider, M. Kolrep, E. L. Barberio, J. A. McKenna, J. E. Pilcher, S. Söldner-Rembold, P. Hüntemeyer, C. Sbarra, D. Eatough, Sachio Komamiya, C. Dallapiccola, P. Poffenberger, Theodoros Geralis, A. T. Watson, Randall Sobie, G. D. Lafferty, J. Patt, André Schöning, J. von Krogh, A. A. Faust, S. A. Robins, O. Sahr, N. Altekamp, H. Voss, T. P. Kokott, M. Gruwé, R. J. Barlow, T. Saeki, D. J. Miller, R. Bartoldus, A. J. Martin, R. Davis, L. A. del Pozo, B. Stockhausen, Paul Kyberd, F. K. Loebinger, Alessandra Fanfani, K. Ackerstaff, P. Scharff-Hansen, T. J. McMahon, Beatrix Dienes, I. J. Bloodworth, A. Hocker, H. O. Ogren, J. Steuerer, C. Couyoumtzelis, Ivor Fleck, Silvia Arcelli, M. Schumacher, E. Lefebvre, S. M. Gascon-Shotkin, R. K. Carnegie, Guenter Duckeck, Satoshi Mihara, Joleen Pater, M. Herndon, Christoph Geich-Gimbel, A. Klier, M. Bobinski, J. A. Wilson, C. K. Hargrove, R. Giacomelli, A. Oh, F. Odorici, M. Fierro, P. Gagnon, S. Baumann, Ekg Sarkisyan, Yoram Rozen, S. B. Anderson, M. Foucher, D. Chrisman, G. D. Long, D. Lazic, Matthew Evans, A. M. Rossi, John Allison, P. Szymanski, E. A. Mckigney, P. W. Jeffreys, W. P. Lai, Vakhtang Kartvelishvili, K. Stephens, Junichi Kanzaki, R. G. Kellogg, J. E. Conboy, A. Fürtjes, Csaba Hajdu, D. Karlen, A. Sittler, Stefano Marcellini, J. Goldberg, J. M. Roney, Stan Bentvelsen, Lutz Feld, N. I. Geddes, Peter Schleper, Michael Hildreth, V. Gibson, N. L. Rodning, Zoltan Laszlo Trocsanyi, B. Poli, D. I. Futyan, B. Nellen, Volker Blobel, T. R. Junk, P. Vikas, D. Lanske, I. Trigger, D. R. Ward, T. Kress, A. M. Smith, S. D. Bird, D. Axen, A. Jawahery, H. G. Evans, Peter Sherwood, M. J. Goodrick, I. Cohen, Christoph Rembser, Alexander Wagner, J. Ludwig, K. Runge, P. Bock, Stephen Lloyd, James Pinfold, R. Perez-Ochoa, D. G. Fong, J. Gascon, Ehud Duchovni, M. Jimack, J. W. Gary, D. S. Koetke, A. Michelini, Marcello Mannelli, K. Stoll, Andris Skuja, T. Kobayashi, S. Petzold, Tetsuro Mashimo, W. Gorn, R. Kowalewski, R. Van Kooten, Gideon Alexander, Paolo Capiluppi, F. Wäckerle, D. M. Gingrich, M. Fanti, W. R. Gibson, Robert McPherson, Mathieu Doucet, R. M. Brown, Lorne Levinson, A. Skillman, R. D. Heuer, Reda Tafirout, Klaus Kurt Desch, Fabrizio Fabbri, E. Torrence, K. Nagai, D. R. Rust, A. M. Lee, E. von Törne, F. Scharf, German Martinez, M. A. Thomson, E. K. U. Gross, M. Sproston, J. Schieck, W. Mohr, and A. Posthaus
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, Hadron, Fragmentation function, High Energy Physics::Experiment, Channel analysis, Scalar meson, Engineering (miscellaneous)
Abstract: Inclusive production of the ${\rm f_0}(980)$, ${\rm f}_2(1270)$ and $\phi(1020)$ resonances has been studied in a sample of 4.3 million hadronic ${\rm Z}^0$ decays from the OPAL experiment at LEP. A coupled channel analysis has been used for the ${\rm f}_0$ in simultaneous fits to the resonances in inclusive $\pi^+\pi^-$ and ${\rm K^+K^-}$ mass spectra. Fragmentation functions are reported for the three states. Total inclusive rates are measured to be $0.141 \pm 0.007 \pm 0.011$${\rm f}_0$, $0.155\pm0.011\pm0.018$${\rm f}_2$ and $0.091\pm0.002\pm0.003$$\phi$ mesons per hadronic ${\rm Z}^0$ decay. The production properties of the ${\rm f}_0$, including those in three-jet events, are compared with those of the ${\rm f}_2$ and $\phi$, and with the Lund string model of hadron production. All measurements are consistent with the hypothesis that the ${\rm f_0}(980)$ is a conventional ${\rm q\bar q}$ scalar meson.
Published: 1998

9. Search for anomalous production of photonic events with missing energy in ${\rm e^+e^-}$ collisions at $\sqrt{s} = 130$ –172 GeV

Author: A. Klier, P. Routenburg, C. Dallapiccola, M. Hauschild, C. Markopoulos, C. Markus, G. T. Jones, E. H. Vokurka, N. Altekamp, H. Voss, S. Orito, W. Gorn, S. R. Lautenschlager, H. A. Neal, R. J. Barlow, D. J. Miller, Stefan Kluth, E. K.G. Sarkisyan, U. Ruppel, M. R. Ingram, J. Lauber, S. Betts, M. Hapke, W. J. McDonald, A. Sittler, P. G. Estabrooks, O. Runolfsson, G. W. Wilson, V. Zacek, D. E. Hutchcroft, N. J. Oldershaw, Gideon Bella, R. Howard, U. Jost, N. K. Watson, S. D. Talbot, G. Yekutieli, P. Scharff-Hansen, A. D. Schaile, H. J. Burckhart, Jacqueline Batley, C. Beeston, M. J. Oreglia, W. M. Sang, Gregor Herten, B. Wilkens, A. Biguzzi, Raimund Ströhmer, N. Rodning, P. M. Watkins, A. Rooke, J. E. Pilcher, Gabriella Pasztor, Claudio Grandi, J. Grunhaus, D. C. Imrie, P. R. Hobson, J. G. Layter, I. Nakamura, A. K. Honma, R. Van Kooten, F. G. Oakham, D. Eatough, B. Schmitt, E. L. Barberio, R. Bartoldus, D. Lui, B. Nellen, A. M. Smith, A. Oh, Paolo Capiluppi, J-P. Meyer, John Allison, Richard Keeler, R. J. Hemingway, H. O. Ogren, L. Levinson, G. D. Long, M. Schumacher, K. Stephens, G. A. Snow, C. P. Ward, E. Lefebvre, R. L. Coxe, Christoph Geich-Gimbel, J. R. Carter, Georges Azuelos, C. R. Jones, G. Mikenberg, T. Kawamoto, Stefan Schmitt, A. Macpherson, B. W. Kennedy, P. Jovanovic, R. Lahmann, Austin Ball, S. Söldner-Rembold, F. Odorici, A. Hocker, G. N. Patrick, Peter Krieger, R. G. Kellogg, P. E.L. Clarke, Alessandro Montanari, R. Davis, Silvia Arcelli, Hans-Christian Schultz-Coulon, Csaba Hajdu, D. Chrisman, R. Perez-Ochoa, G. D. Lafferty, M. Verzocchi, K. W. Bell, Otmar Biebel, H. G. Evans, M. J. Goodrick, P. Igo-Kemenes, N. I. Geddes, Michael Hildreth, P. Gagnon, M. K. Jones, J. P. Martin, J. Letts, Christoph Rembser, E. Tsur, S. Komamiya, V. Gibson, J. S. White, Stefano Marcellini, C. Hartmann, D. G. Fong, J. Gascon, D. E. Plane, S. Dado, J. Pinfold, J. C. Hill, D. Lazic, T. J. McMahon, C. Couyoumtzelis, P. Mättig, S. Asai, Vakhtang Kartvelishvili, G. P. Siroli, S. De Jong, Christoph Schwick, K. Ackerstaff, F. Fiedler, F. Wäckerle, L. Brigliadori, S. Baumann, H. Jeremie, Stephen Lloyd, Stephen Hillier, R. K. Carnegie, E. Gross, Dave Charlton, B. Poli, F. Scharf, German Martinez, I. J. Bloodworth, Peter Schleper, K. Kawagoe, J. E. Conboy, A. Fürtjes, K. Sachs, J. Goldberg, E. A. Mckigney, S. Tarem, B. C. Shen, G. M. Dallavalle, T. R. Junk, J. M. Roney, M. Fierro, J. E.G. Edwards, R. Bürgin, H. M. Fischer, A. N. Bell, D. M. Gingrich, M. Herndon, B. Dienes, I. Trigger, A. Joly, J. W. Gary, W. P. Lai, D. S. Koetke, Marcello Mannelli, Guenter Duckeck, Lutz Feld, R. Mir, M. Bobinski, Norbert Wermes, Sherry Towers, Paolo Giacomelli, J. A. Wilson, M. Hansroul, D. R. Ward, M. Jimack, Siegfried Bethke, T. Kress, W. G. Scott, A. Michelini, H. Mes, O. Schaile, P. W. Jeffreys, M. Foucher, I. P. Duerdoth, S. D. Bird, G. G. Hanson, A. M. Lee, G. Alexander, M. Boutemeur, F. S. Merritt, Richard Teuscher, S. Braibant, S. Yamashita, R. Rylko, B. Stockhausen, Paul Kyberd, F. K. Loebinger, D. I. Futyan, A. S. Turcot, C. Burgard, I. Cohen, Ivor Fleck, G. Giacomelli, S. W. O'Neale, A. Jawahery, Joleen Pater, M. F. Turner-Watson, R. W. Springer, R. J. Homer, D. Karlen, T. Saeki, P. I. Kayal, S. F. Ashby, R. Giacomelli, Sven Menke, Daniele Bonacorsi, Z. Trácsanyi, Peter Sherwood, S. Mihara, S. M. Gascon-Shotkin, M. A. Thomson, S. Robertson, D. Glenzinski, Dezso Horvath, M. J. Losty, R. Sobie, M. S. Dixit, Frans Meijers, P. S. Wells, J. Bechtluft, K. J. Anderson, M. Fanti, D. Zer-Zion, V. Blobel, J. A. McKenna, J. Ludwig, Reda Tafirout, Klaus Kurt Desch, S. A. Robins, R. Hawkings, K. Runge, P. Bock, E. Torrence, S. Petzold, Matthew Evans, A. M. Rossi, M. Kolrep, M. Sproston, Terry Richard Wyatt, C. Y. Chang, P. Vikas, D. Lanske, T. Mori, J. von Krogh, D. Lellouch, W. R. Gibson, J. E. Bloomer, D. Axen, K. R. Hossain, S. B. Anderson, J. Pálinkás, J. Kirk, P. Szymanski, P. Taras, Michael Kobel, R. M. Brown, E. von Tärne, Theodoros Geralis, A. Skillman, O. C. Cooke, P. Pfeifenschneider, A. T. Watson, L. A. del Pozo, Stan Bentvelsen, Allen Mincer, T. P. Kokott, T. Mashimo, Alessandra Fanfani, J. Patt, André Schöning, Robert McPherson, C. Sbarra, P. Huntemeyer, A. A. Carter, Ron Folman, T. Kobayashi, Mathieu Doucet, R. D. Heuer, P. Utzat, A. A. Faust, Fabrizio Fabbri, J. Schieck, D. M. Strom, E. Duchovni, W. Mohr, A. Posthaus, K. Nagai, D. R. Rust, J. Kanzaki, S. Tanaka, Tara Shears, P. A. Hart, P. Poffenberger, K. Ishii, Claire Shepherd-Themistocleous, A. Wagner, Matthias Schröder, T. Behnke, J. Steuerer, M. Thiergen, A. Macchiolo, M. Gruwé, C. M. Hawkes, Richard Nisius, Marco Cuffiani, U. Müller, A. J. Martin, C. K. Hargrove, K. Stoll, Andris Skuja, and Y. Rozen
Subjects: Physics, Particle physics, Missing energy, Physics and Astronomy (miscellaneous), Electron–positron annihilation, Physics beyond the Standard Model, Standard Model, Nuclear physics, Pair production, Neutralino, High Energy Physics::Experiment, Production (computer science), Engineering (miscellaneous), Energy (signal processing)
Abstract: Photonic events with large missing energy have been observed in $\mathrm{e^+e^-}$ collisions at centre-of-mass energies of 130, 136, 161 and 172 GeV using the OPAL detector at LEP. Results are presented based on search topologies designed to select events with a single photon and missing transverse energy or events with a pair of acoplanar photons. In both search topologies, cross-section measurements are performed within the kinematic acceptance of the selection. These results are compared with the expectations from the Standard Model processes ${\rm e^+e^-}\to \nu\overline\nu \gamma (\gamma )$ (single-photon) and ${\rm e^+e^-}\to \nu\overline\nu \gamma \gamma (\gamma )$ (acoplanar-photons). No evidence is observed for new physics contributions to these final states. Upper limits on $\sigma({\rm e^+e^- \to XY)\cdot BR(X\to Y\gamma })$ and $\sigma({\rm e^+e^- \to XX)\cdot BR^2(X\to Y\gamma })$ are derived for the case of stable and invisible Y. These limits apply to single and pair production of excited neutrinos (${\rm X}= \nu^*,{\rm Y}= \nu$), to neutralino production (${\rm X}=\tilde\chi^0_2, {\rm Y}=\tilde\chi^0_1$), and to supersymmetric models in which ${\rm X}= \tilde\chi^0_1$ and ${\rm Y}=\tilde{\rm G}$ is a light gravitino. For the latter scenario, the results of the acoplanar-photons search are used to provide mode l-dependent lower limits on the mass of the lightest neutralino.
Published: 1998

10. Measurements of the Bs0 and Λb0 lifetimes

Author: K Ackerstaff, G Alexander, J Allison, N Altekamp, K.J Anderson, S Anderson, S Arcelli, S Asai, S.F Ashby, D Axen, G Azuelos, A.H Ball, E Barberio, R.J Barlow, R Bartoldus, J.R Batley, S Baumann, J Bechtluft, C Beeston, T Behnke, A.N Bell, K.W Bell, G Bella, S Bentvelsen, S Bethke, S Betts, O Biebel, A Biguzzi, S.D Bird, V Blobel, I.J Bloodworth, J.E Bloomer, M Bobinski, P Bock, D Bonacorsi, M Boutemeur, S Braibant, L Brigliadori, R.M Brown, H.J Burckhart, C Burgard, R Bürgin, P Capiluppi, R.K Carnegie, A.A Carter, J.R Carter, C.Y Chang, D.G Charlton, D Chrisman, P.E.L Clarke, I Cohen, J.E Conboy, O.C Cooke, C Couyoumtzelis, R.L Coxe, M Cuffiani, S Dado, C Dallapiccola, G.M Dallavalle, R Davis, S De Jong, L.A del Pozo, K Desch, B Dienes, M.S Dixit, M Doucet, E Duchovni, G Duckeck, I.P Duerdoth, D Eatough, J.E.G Edwards, P.G Estabrooks, H.G Evans, M Evans, F Fabbri, A Fanfani, M Fanti, A.A Faust, L Feld, F Fiedler, M Fierro, H.M Fischer, I Fleck, R Folman, D.G Fong, M Foucher, A Fürtjes, D.I Futyan, P Gagnon, J.W Gary, J Gascon, S.M Gascon-Shotkin, N.I Geddes, C Geich-Gimbel, T Geralis, G Giacomelli, P Giacomelli, R Giacomelli, V Gibson, W.R Gibson, D.M Gingrich, D Glenzinski, J Goldberg, M.J Goodrick, W Gorn, C Grandi, E Gross, J Grunhaus, M Gruwé, C Hajdu, G.G Hanson, M Hansroul, M Hapke, C.K Hargrove, P.A Hart, C Hartmann, M Hauschild, C.M Hawkes, R Hawkings, R.J Hemingway, M Herndon, G Herten, R.D Heuer, M.D Hildreth, J.C Hill, S.J Hillier, P.R Hobson, A Hocker, R.J Homer, A.K Honma, D Horváth, K.R Hossain, R Howard, P Hüntemeyer, D.E Hutchcroft, P Igo-Kemenes, D.C Imrie, M.R Ingram, K Ishii, A Jawahery, P.W Jeffreys, H Jeremie, M Jimack, A Joly, C.R Jones, G Jones, M Jones, U Jost, P Jovanovic, T.R Junk, J Kanzaki, D Karlen, V Kartvelishvili, K Kawagoe, T Kawamoto, P.I Kayal, R.K Keeler, R.G Kellogg, B.W Kennedy, J Kirk, A Klier, S Kluth, T Kobayashi, M Kobel, D.S Koetke, T.P Kokott, M Kolrep, S Komamiya, T Kress, P Krieger, J von Krogh, P Kyberd, G.D Lafferty, R Lahmann, W.P Lai, D Lanske, J Lauber, S.R Lautenschlager, J.G Layter, D Lazic, A.M Lee, E Lefebvre, D Lellouch, J Letts, L Levinson, S.L Lloyd, F.K Loebinger, G.D Long, M.J Losty, J Ludwig, D Lui, A Macchiolo, A Macpherson, M Mannelli, S Marcellini, C Markopoulos, C Markus, A.J Martin, J.P Martin, G Martinez, T Mashimo, P Mättig, W.J McDonald, J McKenna, E.A Mckigney, T.J McMahon, R.A McPherson, F Meijers, S Menke, F.S Merritt, H Mes, J Meyer, A Michelini, G Mikenberg, D.J Miller, A Mincer, R Mir, W Mohr, A Montanari, T Mori, U Müller, S Mihara, K Nagai, I Nakamura, H.A Neal, B Nellen, R Nisius, S.W O'Neale, F.G Oakham, F Odorici, H.O Ogren, A Oh, N.J Oldershaw, M.J Oreglia, S Orito, J Pálinkás, G Pásztor, J.R Pater, G.N Patrick, J Patt, R Perez-Ochoa, S Petzold, P Pfeifenschneider, J.E Pilcher, J Pinfold, D.E Plane, P Poffenberger, B Poli, A Posthaus, C Rembser, S Robertson, S.A Robins, N Rodning, J.M Roney, A Rooke, A.M Rossi, P Routenburg, Y Rozen, K Runge, O Runolfsson, U Ruppel, D.R Rust, R Rylko, K Sachs, T Saeki, W.M Sang, E.K.G Sarkisyan, C Sbarra, A.D Schaile, O Schaile, F Scharf, P Scharff-Hansen, J Schieck, P Schleper, B Schmitt, S Schmitt, A Schöning, M Schröder, H.C Schultz-Coulon, M Schumacher, C Schwick, W.G Scott, T.G Shears, B.C Shen, C.H Shepherd-Themistocleous, P Sherwood, G.P Siroli, A Sittler, A Skillman, A Skuja, A.M Smith, G.A Snow, R Sobie, S Söldner-Rembold, R.W Springer, M Sproston, K Stephens, J Steuerer, B Stockhausen, K Stoll, D Strom, R Ströhmer, P Szymanski, R Tafirout, S.D Talbot, S Tanaka, P Taras, S Tarem, R Teuscher, M Thiergen, M.A Thomson, E von Törne, E Torrence, S Towers, I Trigger, Z Trócsányi, E Tsur, A.S Turcot, M.F Turner-Watson, P Utzat, R Van Kooten, M Verzocchi, P Vikas, E.H Vokurka, H Voss, F Wäckerle, A Wagner, C.P Ward, D.R Ward, P.M Watkins, A.T Watson, N.K Watson, P.S Wells, N Wermes, J.S White, B Wilkens, G.W Wilson, J.A Wilson, T.R Wyatt, S Yamashita, G Yekutieli, V Zacek, and D Zer-Zion
Subjects: Baryon, Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, 0103 physical sciences, Hadron, High Energy Physics::Experiment, 010306 general physics, Lambda, 01 natural sciences, Bar (unit)
Abstract: This paper presents updated measurements of the lifetimes of the B^0_s meson and the \Lambda_b baryon using 4.4 million hadronic Z^0 decays recorded by the OPAL detector at LEP from 1990 to 1995. A sample of B^0_s decays is obtained using D_s^- \ell^+ combinations, where the D_s^- is fully reconstructed in the \phi \pi^-, K^*0 K^- and K^- K^0_S decay channels and partially reconstructed in the \phi \ell^- \nu(bar) X decay mode. A sample of \Lambda_b decays is obtained using \Lambda_c^+ \ell^- combinations, where the \Lambda_c^+ is fully reconstructed in its decay to a p K^- \pi^+ final state and partially reconstructed in the \Lambda \ell^+ \nu X decay channel. From 172 +/- 28 D_s^- \ell^+ combinations attributed to B^0_s decays, the measured lifetime is \tau(B^0_s) = 1.50 +0.16 -0.15 +/- 0.04 ps, where the errors are statistical and systematic, respectively. From the 129 +\- 25 \Lamda_c^+ \ell^- combinations attributed to \Lambda_b decays, the measured lifetime \tau(\Lambda_b) = 1.29 +0.24 -0.22 +/- 0.06 ps, where the errors are statistical and systematic, respectively.
Published: 1998

11. Four-layer aerogel Cherenkov counter

Author: G. M. Kolachev, R. Santacesaria, Remi Lafaye, K. Arisaka, M. Posocco, Ezio Torassa, H. Jawahery, A. R. Buzykaev, J. Favier, M. A. Mazzoni, F. Dal Corso, Valery I. Telnov, V. Mikerov, Mauro Morandin, A. G. Shamov, S.F. Ganzhur, G. Piredda, M. Foucher, I. De Bonis, S. Morganti, E. A. Kravchenko, J. Oyang, C. Voci, A. P. Onuchin, E. Borsato, M. Serra, Y. Karyotakis, D. Boutigny, F. Iacovella, R. Stroili, V.A. Tayursky, and F. Ferroni
Subjects: Physics, Condensed Matter::Other, Physics::Instrumentation and Detectors, business.industry, Scattering, Monte Carlo method, Detector, Aerogel, Condensed Matter Physics, Particle identification, Electronic, Optical and Magnetic Materials, Condensed Matter::Soft Condensed Matter, Nuclear physics, Optics, Materials Chemistry, Ceramics and Composites, High Energy Physics::Experiment, Reflection coefficient, business, Refractive index, Cherenkov radiation
Abstract: A 4-layer design of aerogel threshold counters using two refractive indices was suggested for the particle identification in the forward region of the BaBar detector. Three prototypes filled with the high quality aerogel produced in Novosibirsk were tested at T10 beam at CERN. Monte Carlo code was developed for the simulation of the light collection in aerogel counters. Monte Carlo results based on measured PTFE reflection coefficient and aerogel absorption and scattering lengths are in agreement with experiment.
Published: 1998

12. Multi-photon final states in e+e− collisions at ∝s =130-172 GeV

Author: S. Petzold, G. D. Long, Tetsuro Mashimo, J. M. Roney, Anna Macchiolo, W. Gorn, Gabriella Pasztor, S. D. Bird, P. E. L. Clarke, W. Mohr, A. Posthaus, Matthias Schröder, G. A. Snow, S. R. Lautenschlager, H. A. Neal, M. Jimack, C. P. Ward, John Allison, B. Schmitt, K. Nagai, Eduardo Ros, N. K. Watson, S. M. Gascon-Shotkin, M. Thiergen, D. L. Rees, S. Söldner-Rembold, Kiyotomo Kawagoe, S. J. De Jong, Satoshi Mihara, Daniel Lellouch, Hildreth, P. Scharff-Hansen, C.J. Beeston, A. P. Wagner, Frank Fiedler, D. Axen, S. Komamiya, A. Jawahery, David G. Charlton, Gideon Bella, BT Bouwens, Rick J. Van Kooten, Eugene P. Gross, F. Wäckerle, Paolo Giacomelli, Takehiko Mori, H. J. Burckhart, Jacqueline Batley, M. Hansroul, Georges Azuelos, E. Tsur, C. M. Hawkes, S. H. Robertson, J. Goldberg, B. Nellen, N. J. Oldershaw, E. Lefebvre, J. Steuerer, A. M. Rossi, Isabel Marian Trigger, K. W. Bell, F. Scharf, German Martinez, Gideon Alexander, Otmar Biebel, Marco Verzocchi, R. Bartoldus, J. W. Gary, J. Palinkas, K. Sachs, F. Odorici, R. G. Kellogg, C. H. Shepherd-Themistocleous, R. J. Homer, D. S. Koetke, Csaba Hajdu, Stefano Marcellini, James Letts, A. D. Schaile, A. S. Turcot, P. Igo-Kemenes, Gy. Wolf, Shigenori Tanaka, Shlomo Dado, K. Ishii, K. R. Hossain, Paolo Capiluppi, P.A. Hart, H. Jeremie, H. O. Ogren, J. C. Hill, R. J. Teuscher, A. M. Smith, A. Michelini, V. Kartvelishvili, S. A. Robins, D. Rigby, R. J. Hemingway, Christoph Geich-Gimbel, D. R. Rust, J. Ludwig, B. C. Shen, K. Runge, P. Bock, J. R. Carter, P. I. Kayal, T. Behnke, Siegfried Bethke, G. Duckeck, W. G. Scott, P. G. Estabrooks, V. Gibson, H. G. Evans, P. Szymanski, M. J. Goodrick, Doug Gingrich, J. A. McKenna, I. Cohen, P. Jovanovic, I. J. Bloodworth, James Pinfold, I. Nakamura, R. Perez-Ochoa, E. do Couto e Silva, Ehud Duchovni, E. von Törne, C. R. Jones, Richard Nisius, U. Müller, T. Kress, Peter Krieger, D. G. Fong, Carla Sbarra, J. Gascon, P. Gagnon, Dezso Horvath, M. J. Losty, Sven Menke, Alessandro Montanari, A. J. Martin, K. Ackerstaff, P. M. Watkins, Takayuki Saeki, Jean-Arcady Meyer, Sherry Towers, T. Kawamoto, Marco Cuffiani, N. L. Rodning, A. Skillman, D. E. Hutchcroft, C. Dallapiccola, M. Kolrep, D. Karlen, Carsten Daniel Burgard, B. Poli, G. Mikenberg, O. Schaile, I. P. Duerdoth, Yoram Rozen, V. Zacek, A. Sittler, S. Orito, A. K. Honma, N. Altekamp, M. Foucher, Claudio Grandi, Peter Schleper, C. K. Hargrove, Zoltan Laszlo Trocsanyi, S. J. Hillier, Tara Shears, Robert McPherson, B. Stockhausen, P. Kyberd, P. Hüntemeyer, S. B. Anderson, F. K. Loebinger, D. J. Miller, A. H. Ball, Silvia Arcelli, M. F. Turner-Watson, Meirin Oan Evans, D. C. Imrie, Mathieu Doucet, M. Hapke, R. Bürgin, Marcello Mannelli, D. M. Strom, Matthew Herndon, Fabrizio Fabbri, M. Morii, Markus Schumacher, E.K.G. Sarkisian, H. Voss, G. W. Wilson, Peter R Hobson, Ivor Fleck, G. P. Siroli, S. Baumann, M. J. Pearce, U. Jost, R. Mir, Stan Bentvelsen, Christoph Schwick, J.A. Lauber, M. J. Oreglia, H. Mes, D Chrisman, E. A. Mckigney, S. Braibant, J. E. Conboy, S. D. Talbot, M. Sproston, Joleen Pater, Peter Sherwood, D. Zer-Zion, W. P. Lai, A. Fürtjes, Stefan Kluth, T. Geralis, R. D. Heuer, Shlomit Tarem, F. G. Oakham, Stefan Schmitt, Norbert Wermes, G. N. Patrick, E. L. Barberio, A. Klier, D. Eatough, R. Giacomelli, G. D. Lafferty, D. I. Futyan, Volker Blobel, P. Routenburg, T. R. Wyatt, Jochen Schieck, T. R. Junk, M. Gruwe, Hans-Christian Schultz-Coulon, Thomson, M. J. Kobel, P. Mättig, Shoji Asai, Stephen Lloyd, A. A. Faust, D. Glenzinski, Satoru Yamashita, Robert M Brown, Gregor Herten, R. Rylko, Robert Wayne Springer, M. Boutemeur, M. Fierro, J. E.G. Edwards, F. S. Merritt, T. P. Kokott, Dixit, P. W. Jeffreys, P. S. Wells, David E. Plane, B. Wilkens, J. E. Bloomer, T. Kobayashi, A. M. Lee, A. Macpherson, Richard Keeler, P. Vikas, R. J. Sobie, Robert Lahmann, R. Howard, J. S. White, Alexander Oh, J. E. Pilcher, D. Lanske, J. Bechtluft, M. Hauschild, C. Markus, G. T. Jones, E. H. Vokurka, P R Poffenberger, J. Grunhaus, C. Hartmann, H. Fischer, O. Runolfsson, Alan Watson, Matthew Jones, Reda Tafirout, Klaus Kurt Desch, W. R. Gibson, A. Joly, Lorne Levinson, B. W. Kennedy, N. I. Geddes, Roger Barlow, K. Stephens, W.John McDonald, D. Lazic, D. R. Ward, U. Ruppel, M. R. Ingram, C. Y. Chang, P. Taras, G. Yekutieli, Allen Mincer, Marcello Fanti, Julie Kirk, P. Pfeifenschneider, A. A. Carter, Ron Folman, J. Patt, André Schöning, G. G. Hanson, G.Marco Dallavalle, P. Utzat, Beatrix Dienes, L. Brigliadori, G. Giacomelli, Daniele Bonacorsi, O. C. Cooke, S. W. O'Neale, R. Davies, P. Schenk, K. J. Anderson, J. von Krogh, Frans Meijers, R. J. Hawkings, L. A. del Pozo, A. Biguzzi, A. Rooke, J. G. Layter, T. J. McMahon, R. K. Carnegie, M. Bobinski, J. A. Wilson, J.P. Martin, A. N. Bell, K. Stoll, and Andris Skuja
Subjects: Nuclear physics, Physics, Particle physics, Angular distribution, Physics and Astronomy (miscellaneous), Electron–positron annihilation, Engineering (miscellaneous)
Published: 1998

13. Search for the Bc meson in hadronic Z0 decays

Author: K Ackerstaff, G Alexander, J Allison, N Altekamp, K.J Anderson, S Anderson, S Arcelli, S Asai, S.F Ashby, D Axen, G Azuelos, A.H Ball, E Barberio, R.J Barlow, R Bartoldus, J.R Batley, S Baumann, J Bechtluft, C Beeston, T Behnke, A.N Bell, K.W Bell, G Bella, S Bentvelsen, S Bethke, S Betts, O Biebel, A Biguzzi, S.D Bird, V Blobel, I.J Bloodworth, J.E Bloomer, M Bobinski, P Bock, D Bonacorsi, M Boutemeur, S Braibant, L Brigliadori, R.M Brown, H.J Burckhart, C Burgard, R Bürgin, P Capiluppi, R.K Carnegie, A.A Carter, J.R Carter, C.Y Chang, D.G Charlton, D Chrisman, P.E.L Clarke, I Cohen, J.E Conboy, O.C Cooke, C Couyoumtzelis, R.L Coxe, M Cuffiani, S Dado, C Dallapiccola, G.M Dallavalle, R Davis, S De Jong, L.A del Pozo, K Desch, B Dienes, M.S Dixit, M Doucet, E Duchovni, G Duckeck, I.P Duerdoth, D Eatough, J.E.G Edwards, P.G Estabrooks, H.G Evans, M Evans, F Fabbri, A Fanfani, M Fanti, A.A Faust, L Feld, F Fiedler, M Fierro, H.M Fischer, I Fleck, R Folman, D.G Fong, M Foucher, A Fürtjes, D.I Futyan, P Gagnon, J.W Gary, J Gascon, S.M Gascon-Shotkin, N.I Geddes, C Geich-Gimbel, T Geralis, G Giacomelli, P Giacomelli, R Giacomelli, V Gibson, W.R Gibson, D.M Gingrich, D Glenzinski, J Goldberg, M.J Goodrick, W Gorn, C Grandi, E Gross, J Grunhaus, M Gruwé, C Hajdu, G.G Hanson, M Hansroul, M Hapke, C.K Hargrove, P.A Hart, C Hartmann, M Hauschild, C.M Hawkes, R Hawkings, R.J Hemingway, M Herndon, G Herten, R.D Heuer, M.D Hildreth, J.C Hill, S.J Hillier, P.R Hobson, A Hocker, R.J Homer, A.K Honma, D Horváth, K.R Hossain, R Howard, P Hüntemeyer, D.E Hutchcroft, P Igo-Kemenes, D.C Imrie, M.R Ingram, K Ishii, A Jawahery, P.W Jeffreys, H Jeremie, M Jimack, A Joly, C.R Jones, G Jones, M Jones, U Jost, P Jovanovic, T.R Junk, J Kanzaki, D Karlen, V Kartvelishvili, K Kawagoe, T Kawamoto, P.I Kayal, R.K Keeler, R.G Kellogg, B.W Kennedy, J Kirk, A Klier, S Kluth, T Kobayashi, M Kobel, D.S Koetke, T.P Kokott, M Kolrep, S Komamiya, T Kress, P Krieger, J von Krogh, P Kyberd, G.D Lafferty, R Lahmann, W.P Lai, D Lanske, J Lauber, S.R Lautenschlager, J.G Layter, D Lazic, A.M Lee, E Lefebvre, D Lellouch, J Letts, L Levinson, S.L Lloyd, F.K Loebinger, G.D Long, M.J Losty, J Ludwig, D Lui, A Macchiolo, A Macpherson, M Mannelli, S Marcellini, C Markopoulos, C Markus, A.J Martin, J.P Martin, G Martinez, T Mashimo, P Mättig, W.J McDonald, J McKenna, E.A Mckigney, T.J McMahon, R.A McPherson, F Meijers, S Menke, F.S Merritt, H Mes, J Meyer, A Michelini, G Mikenberg, D.J Miller, A Mincer, R Mir, W Mohr, A Montanari, T Mori, U Müller, S Mihara, K Nagai, I Nakamura, H.A Neal, B Nellen, R Nisius, S.W O'Neale, F.G Oakham, F Odorici, H.O Ogren, A Oh, N.J Oldershaw, M.J Oreglia, S Orito, J Pálinkás, G Pásztor, J.R Pater, G.N Patrick, J Patt, R Perez-Ochoa, S Petzold, P Pfeifenschneider, J.E Pilcher, J Pinfold, D.E Plane, P Poffenberger, B Poli, A Posthaus, C Rembser, S Robertson, S.A Robins, N Rodning, J.M Roney, A Rooke, A.M Rossi, P Routenburg, Y Rozen, K Runge, O Runolfsson, U Ruppel, D.R Rust, R Rylko, K Sachs, T Saeki, W.M Sang, E.K.G Sarkisyan, C Sbarra, A.D Schaile, O Schaile, F Scharf, P Scharff-Hansen, J Schieck, P Schleper, B Schmitt, S Schmitt, A Schöning, M Schröder, H.C Schultz-Coulon, M Schumacher, C Schwick, W.G Scott, T.G Shears, B.C Shen, C.H Shepherd-Themistocleous, P Sherwood, G.P Siroli, A Sittler, A Skillman, A Skuja, A.M Smith, G.A Snow, R Sobie, S Söldner-Rembold, R.W Springer, M Sproston, K Stephens, J Steuerer, B Stockhausen, K Stoll, D Strom, R Ströhmer, P Szymanski, R Tafirout, S.D Talbot, S Tanaka, P Taras, S Tarem, R Teuscher, M Thiergen, M.A Thomson, E von Törne, E Torrence, S Towers, I Trigger, Z Trócsányi, E Tsur, A.S Turcot, M.F Turner-Watson, P Utzat, R Van Kooten, M Verzocchi, P Vikas, E.H Vokurka, H Voss, F Wäckerle, A Wagner, C.P Ward, D.R Ward, P.M Watkins, A.T Watson, N.K Watson, P.S Wells, N Wermes, J.S White, B Wilkens, G.W Wilson, J.A Wilson, T.R Wyatt, S Yamashita, G Yekutieli, V Zacek, and D Zer-Zion
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, FOS: Physical sciences, Electron, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Particle Physics - Experiment
Abstract: A search for decays of the B_c meson was performed using data collected from 1990-1995 with the OPAL detector on or near the Z peak at LEP. The decay channels B_c^+ -> J/psi pi^+, B_c^+ -> J/psi a_1^+ and B_c^+ -> J/psi ell^+ nu were investigated, where ell denotes an electron or a muon. Two candidates are observed in the mode B_c^+ -> J/psi pi^+, with an estimated background of (0.63 +/- 0.20) events. The weighted mean of the masses of the two candidates is (6.32 +/- 0.06) GeV/c^2, which is consistent with the predicted mass of the B_c meson. One candidate event is observed in the mode B_c^+ -> J/psi ell^+ nu with an estimated background of (0.82 +/- 0.19) events. No candidate events are observed in the B_c^+ -> J/psi a_1^+ decay mode, with an estimated background of (1.10 +/- 0.22) events. Upper bounds at the 90% confidence level are set on the production rates for these processes., 18 pages, LaTeX, uses a4p.sty, 6 eps figures included, submitted to Phys. Lett. B
Published: 1998

14. Production of P-wave charm and charm-strange mesons in hadronic Z $^0$ decays

Author: Matthias Schröder, D. L. Rees, M. A. Thomson, E. K. U. Gross, M. Sproston, F. Scharf, G. G. Hanson, German Martinez, M. Thiergen, Hans-Christian Schultz-Coulon, Randall Sobie, G. Giacomelli, J. Letts, Michael Schulz, G. D. Lafferty, H. M. Fischer, J. Schieck, W. Mohr, Ekg Sarkisyan, M. Fanti, A. Posthaus, J. Lauber, L. Brigliadori, K. Stoll, Gideon Bella, R. W. Springer, H. Mes, I. P. Duerdoth, Otmar Biebel, H. J. Burckhart, J. Grunhaus, P. W. Jeffreys, K. Sachs, Shlomo Dado, Andris Skuja, Jacqueline Batley, J. Goldberg, B. Nellen, S. Petzold, Tetsuro Mashimo, Tara Shears, P. A. Hart, Daniel Lellouch, Robert McPherson, Takehiko Mori, Mathieu Doucet, Guenter Duckeck, P. G. Estabrooks, D. Chrisman, G. D. Long, Volker Blobel, S. D. Talbot, S. W. O'Neale, S. Yamashita, P. Igo-Kemenes, K. Ishii, H. Jeremie, Stephen Lloyd, R. D. Heuer, Robert M Brown, Fabrizio Fabbri, M. J. Pearce, V. Zacek, K. J. Anderson, Georges Azuelos, Reda Tafirout, Klaus Kurt Desch, Kiyotomo Kawagoe, A. Joly, R. Van Kooten, D. Eatough, N. K. Watson, E. Tsur, H. G. Evans, Giora Mikenberg, W. Gorn, C. R. Jones, M. J. Goodrick, P. M. Watkins, Claire Shepherd-Themistocleous, S. B. Anderson, M. Verzocchi, P. Szymanski, Norbert Wermes, K. W. Bell, Sherry Towers, I. Cohen, P. Poffenberger, O. Schaile, M. Schumacher, E. do Couto e Silva, C. Sbarra, E. Lefebvre, P. Vikas, J. Pálinkás, T. Kawamoto, S. Braibant, W. R. Gibson, F. Odorici, A. D. Schaile, F. Wäckerle, N. I. Geddes, D. Lanske, D. M. Gingrich, M. F. Turner-Watson, Michael Hildreth, M. Morii, J. C. Hill, P. Gagnon, Gabriella Pasztor, B. T. Bouwens, Sven Menke, U. Müller, Peter R Hobson, S. Orito, M. Rosvick, John Allison, Dave Charlton, P. Scharff-Hansen, S. R. Lautenschlager, Stan Bentvelsen, W. J. McDonald, N. L. Rodning, H. A. Neal, B. C. Shen, D. Zer-Zion, A. J. Martin, Lorne Levinson, A. Sittler, P. Routenburg, P. Berlich, M. Hapke, B. Poli, K. Nagai, G. A. Snow, C. P. Ward, Sachio Komamiya, Peter Schleper, Gideon Alexander, Theodoros Geralis, A. A. Faust, Stefan Kluth, A. Skillman, R. Bürgin, P. Pfeifenschneider, Paolo Capiluppi, Stefan Schmitt, E. Ros, Siegfried Bethke, T. Hilse, D. R. Rust, D. E. Hutchcroft, R. Lahmann, Shlomit Tarem, A. K. Honma, Silvia Arcelli, D. C. Imrie, C. Y. Chang, S. Söldner-Rembold, A. M. Smith, R. G. Kellogg, C. Hartmann, U. Ruppel, M. R. Ingram, W. G. Scott, Richard Teuscher, A. S. Turcot, O. Runolfsson, D. E. Plane, I. Nakamura, T. P. Kokott, C. K. Hargrove, Stephen Hillier, J. Patt, G. M. Dallavalle, André Schöning, T. Behnke, Csaba Hajdu, F. Fiedler, A. M. Lee, T. Saeki, M. J. Oreglia, P. Taras, E. von Törne, Michael Kobel, S. D. Bird, P. Schenk, Ehud Duchovni, Alan Watson, Stefano Marcellini, G. P. Siroli, C. Beeston, Christoph Schwick, S. Baumann, D. Axen, M. Jimack, S. A. Robins, James Pinfold, A. Jawahery, Claudio Grandi, S. M. Gascon-Shotkin, P. Mättig, D. Glenzinski, J. R. Carter, G. N. Patrick, Allen Mincer, E. A. Mckigney, Gunter Wolf, Julie Kirk, D. G. Fong, A. Michelini, K. Ackerstaff, Dezso Horvath, M. J. Losty, J. Gascon, M. Kolrep, A. Macchiolo, Shoji Asai, B. Stockhausen, Paul Kyberd, F. K. Loebinger, W. P. Lai, Peter Sherwood, Jean-Arcady Meyer, Satoshi Tanaka, J. Steuerer, M. Gruwé, C. M. Hawkes, K. Stephens, Ivor Fleck, I. J. Bloodworth, Alexander Wagner, T. Kobayashi, J. Ludwig, Joleen Pater, J. W. Gary, Paolo Giacomelli, D. S. Koetke, M. Hansroul, K. Runge, P. Bock, A. Klier, Marcello Mannelli, R. Giacomelli, V. Gibson, Richard Nisius, J. M. Roney, C. Burgard, Marco Cuffiani, Yoram Rozen, T. R. Junk, D. I. Futyan, R. J. Homer, I. Trigger, M. Foucher, M. Fierro, J. E.G. Edwards, D. R. Ward, T. Kress, Matthew Evans, D. Karlen, A. M. Rossi, U. Jost, R. Mir, R. Hawkings, F. G. Oakham, B. Schmitt, E. L. Barberio, D. Rigby, R. J. Hemingway, B. W. Kennedy, P. Jovanovic, Austin Ball, Peter Krieger, Alessandro Montanari, C. Dallapiccola, N. Altekamp, H. Voss, R. J. Barlow, D. J. Miller, S. Robertson, Gregor Herten, B. Wilkens, J. E. Pilcher, G. W. Wilson, M. Hauschild, C. Markus, G. T. Jones, E. H. Vokurka, N. J. Oldershaw, M. S. Dixit, Frans Meijers, A. Biguzzi, A. Rooke, J. G. Layter, P. E.L. Clarke, M. K. Jones, J. P. Martin, S. De Jong, H. Przysiezniak, A. N. Bell, G. Yekutieli, A. A. Carter, Ron Folman, P. Utzat, Daniele Bonacorsi, O. C. Cooke, J. von Krogh, L. A. del Pozo, T. J. McMahon, R. K. Carnegie, M. Herndon, M. Bobinski, J. A. Wilson, D. Lazic, A. Macpherson, Richard Keeler, R. Bartoldus, R. Howard, J. S. White, H. O. Ogren, Christoph Geich-Gimbel, J. E. Conboy, Vakhtang Kartvelishvili, A. Fürtjes, M. Boutemeur, F. S. Merritt, D. M. Strom, J. Bechtluft, J. A. McKenna, R. Rylko, P. S. Wells, Terry Richard Wyatt, and J. E. Bloomer
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Hadronization, Nuclear physics, Excited state, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, Particle Physics - Experiment, K channels
Abstract: Results are presented on the production of excited charm and excited charm-strange mesons in hadronic Z(0) decays. The results are obtained from approximately 4.3 million hadronic Z(0) decays, collected on or near the Z(0) resonance using the OPAL detector at LEP. The D-1(0)(2420) and D*(0)(2)(2460) mesons are reconstructed in the D*(+)pi(-) final state and their separate production rates in charm fragmentation and in weak decays of b-hadrons are determined. Assuming that the decay widths of these mesons are saturated by the allowed D*pi and D pi final states, the charm hadronization fractions and the inclusive branching ratios of b-hadrons to these neutral P-wave charm mesons are determined to bef(c --> D-1(0)) = 0.021 +/- 0.007(stat) +/- 0.003(syst), f(c --> D*(0)(2)) = 0.052 +/- 0.022(stat)+/- 0.013(syst), f(b --> D-1(0)) = 0.050 +/- 0.014(stat) +/- 0.006(syst), f(b --> D*(0)(2)) = 0.047 +/- 0.024(stat) +/- 0.013(syst).We also present the first observation at LEP of the D-s1(+)(2536) meson which is reconstructed in both the D*K-+(s)0 and D*K-0(+) final states After correcting for the expected contribution from bb events, assuming that the D*K channels saturate the available final states, these results are used to derive the charm hadronization fraction f(c --> D-s1(+)):f(c --> D-s1(+)) = 0.016 +/- 0.004(stat) +/- 0.003(syst).
Published: 1997

15. Performance of an aerogel threshold particle identification detector readout by hybrid photon detectors

Author: R. Santacesaria, H. Jawahery, E. A. Kravchenko, S. F. Ganzhur, A. R. Buzykaev, Remi Lafaye, A.G. Shamov, J. Favier, C. Voci, Valery I. Telnov, Y. Karyotakis, E. Borsato, G. Piredda, A. P. Onuchin, D. Boutigny, A. Buccheri, F. Ferroni, Mauro Morandin, R. Stroili, Ezio Torassa, M. Posocco, M. A. Mazzoni, F. Iacovella, M. Foucher, I. De Bonis, S. Morganti, J. Oyang, F. DalCarso, Laboratoire d'Annecy de Physique des Particules (LAPP), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Photodetector, 02 engineering and technology, 01 natural sciences, Particle identification, Linear particle accelerator, Particle detector, law.invention, Nuclear physics, law, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, Electrical and Electronic Engineering, 010306 general physics, Physics, Range (particle radiation), Large Hadron Collider, Detector, Particle accelerator, 021001 nanoscience & nanotechnology, Nuclear Energy and Engineering, Physics::Accelerator Physics, High Energy Physics::Experiment, 0210 nano-technology
Abstract: This paper describes an aerogel threshold particle identification detector developed for use in BABAR, the experiment to be run at the asymmetric e/sup +/e/sup -/ B-factory PEP-II under construction at the Stanford Linear Accelerator Center (SLAC). Results of extensive tests performed at the CERN PS indicate that this detector is capable of separating pions from below-threshold particles in a wide momentum range. The detector is read by a new version of a hybrid photon detector (HPD). The HPD has been chosen because of its excellent behavior in high magnetic fields, where it can be successfully exploited to preserve the required particle identification (PID) performance.
Published: 1997

16. Search for CP violation in Z $^0\longrightarrow{\tau^+\tau^-}$ and an upper limit on the weak dipole moment of the $\tau$ lepton

Author: M. Schumacher, E. Lefebvre, G. W. Wilson, M. Hauschild, S. A. Wotton, C. Markus, G. T. Jones, E. H. Vokurka, F. Odorici, I. J. Bloodworth, A. S. Turcot, F. Fiedler, D. Rigby, R. J. Hemingway, B. W. Kennedy, Yoram Rozen, P. Jovanovic, Austin Ball, Peter Krieger, O. C. Cooke, M. Foucher, R. W. Springer, Manuella Vincter, Alessandro Montanari, M. Kolrep, Matthias Schröder, N. K. Watson, D. Karlen, J. von Krogh, H. Mes, Hans-Christian Schultz-Coulon, I. P. Duerdoth, P. Fath, C. Dallapiccola, Gunter Wolf, K. Ackerstaff, Randall Sobie, A. Biguzzi, Michael Schulz, G. D. Lafferty, Georges Azuelos, N. Altekamp, M. Thiergen, E. Tsur, H. Lafoux, R. J. Barlow, J. M. Roney, Claire Shepherd-Themistocleous, R. Bartoldus, M. Verzocchi, D. J. Miller, Stefan Schmitt, R. J. Hawkings, S. Yamashita, K. W. Bell, P. Igo-Kemenes, J. Pálinkás, K. Ishii, J. Lauber, H. O. Ogren, H. Jeremie, Christoph Geich-Gimbel, L. A. del Pozo, U. Jost, R. Mir, R. E. Hughes-Jones, T. J. Smith, J. C. Hill, K. Stephens, Misao Sasaki, R. Lahmann, Guenter Duckeck, D. C. Imrie, W. Mohr, W. J. McDonald, B. C. Shen, Gideon Bella, H. J. Burckhart, Jacqueline Batley, Paolo Giacomelli, A. Posthaus, P. Mättig, Shoji Asai, V. Gibson, O. Schaile, E. do Couto e Silva, Siegfried Bethke, F. Strumia, S. D. Talbot, G. P. Siroli, A. K. Honma, M. Hansroul, B. Nijjhar, W. G. Scott, T. J. McMahon, Daniel Lellouch, F. G. Oakham, I. Nakamura, Takehiko Mori, B. Schmitt, Abish Malik, T. R. Junk, C. Hartmann, T. Omori, I. Trigger, F. X. Gentit, E. L. Barberio, Kiyotomo Kawagoe, Sven Menke, D. R. Ward, T. Kress, D. E. Plane, S. B. Anderson, P. Szymanski, C. Burgard, Stefan Kluth, R. J. Homer, Shlomit Tarem, U. Müller, V. Zacek, Stephen Hillier, G. M. Dallavalle, J. E. Conboy, D. Chrisman, A. Fürtjes, A. J. Martin, U. Ruppel, M. R. Ingram, R. K. Carnegie, Volker Blobel, T. Behnke, C. R. Jones, M. Herndon, M. Bobinski, J. A. Wilson, D. Glenzinski, Dezso Horvath, M. J. Losty, D. Axen, A. Jawahery, Stan Bentvelsen, Achim Stahl, A. I. McNab, J. Goldberg, Jean-Arcady Meyer, Stephen Lloyd, D. L. Rees, James Pinfold, M. Boutemeur, F. S. Merritt, D. G. Fong, C. Lewis, M. Gruwé, Dave Charlton, A. Wagner, Peter Sherwood, C. M. Hawkes, B. Nellen, C. K. Hargrove, Tara Shears, F. Scharf, J. Gascon, R. Bürgin, German Martinez, J. Ludwig, P. A. Hart, D. Lazic, C. Sbarra, K. Runge, P. Bock, J. W. Gary, J. Bechtluft, J. A. McKenna, Richard Nisius, H. G. Evans, Reda Tafirout, Klaus Kurt Desch, M. J. Goodrick, I. Cohen, M. J. Pearce, D. S. Koetke, Marcello Mannelli, W. Matthews, Marco Cuffiani, K. Ametewee, M. A. Thomson, G. Yekutieli, Andris Skuja, S. Petzold, G. D. Long, Tetsuro Mashimo, P. Pfeifenschneider, E. K. U. Gross, A. Gaidot, J. Patt, Gideon Alexander, Paolo Capiluppi, P. Gagnon, A. A. Carter, Ron Folman, Roger Jones, M. Sproston, W. Gorn, B. J. King, P. Utzat, P. Scharff-Hansen, A. M. Smith, A. Sittler, G. Vasseur, W. R. Gibson, Ehud Duchovni, B. T. Bouwens, M. Jimack, H. M. Bosch, A. Michelini, R. M. Brown, Lorne Levinson, Satoshi Tanaka, T. Kobayashi, A. Skillman, M. F. Turner-Watson, M. Morii, Peter R Hobson, R. Van Kooten, P. Routenburg, F. Wäckerle, D. M. Gingrich, P. Berlich, K. Nagai, J. Grunhaus, D. R. Rust, A. M. Lee, Sachio Komamiya, H. M. Fischer, E. von Törne, Theodoros Geralis, E. Ros, A. T. Watson, T. P. Kokott, S. A. Robins, Robert McPherson, Mathieu Doucet, R. D. Heuer, Fabrizio Fabbri, S. M. Gascon-Shotkin, Matthew Evans, A. M. Rossi, T. Tsukamoto, N. I. Geddes, Michael Hildreth, N. L. Rodning, B. Poli, S. R. Lautenschlager, B. Stockhausen, Paul Kyberd, F. K. Loebinger, H. A. Neal, J. Steuerer, Joleen Pater, T. Hilse, R. Giacomelli, O. Runolfsson, C. Beeston, A. Joly, Claudio Grandi, John Allison, R. G. Kellogg, M. Steiert, Csaba Hajdu, Stefano Marcellini, M. Fierro, J. E.G. Edwards, Ekg Sarkisyan, P. W. Jeffreys, J. J. Ward, P. Vikas, D. Lanske, Silvia Arcelli, E. A. Mckigney, W. P. Lai, P. Schenk, P. G. Estabrooks, R. K. Keeler, N. J. Oldershaw, P. M. Watkins, S. Robertson, Gregor Herten, B. Wilkens, J. E. Pilcher, P. Poffenberger, K. Sachs, Shlomo Dado, Giora Mikenberg, P. Schütz, S. Braibant, A. D. Schaile, Gabriella Pasztor, G. A. Snow, C. P. Ward, S. Söldner-Rembold, R. Howard, J. S. White, C. Y. Chang, D. M. Strom, P. Taras, Michael Kobel, R. Rylko, P. S. Wells, Terry Richard Wyatt, Julie Kirk, J. E. Bloomer, S. W. O'Neale, K. J. Anderson, Otmar Biebel, J. Letts, Norbert Wermes, Sherry Towers, T. Kawamoto, S. Orito, M. Rosvick, M. Hapke, D. E. Hutchcroft, M. J. Oreglia, J. R. Carter, G. N. Patrick, G. G. Hanson, G. Giacomelli, M. S. Dixit, Frans Meijers, P. E.L. Clarke, M. K. Jones, J. P. Martin, S. De Jong, H. Przysiezniak, A. N. Bell, A. Rooke, and J. G. Layter
Subjects: Quark, Physics, Dipole, Particle physics, Physics and Astronomy (miscellaneous), Electron–positron annihilation, Moment (physics), CP violation, Limit (mathematics), Electron, Lepton
Published: 1997

17. Study of $\phi(1020)$ , ${\rm D}^{\pm}$ and B $^$ spin alignment in hadronic Z $^0$ decays

Author: Achim Stahl, P. Pfeifenschneider, J. Patt, Paolo Giacomelli, M. Hansroul, C. Burgard, R. J. Homer, Ekg Sarkisyan, P. W. Jeffreys, W. R. Gibson, J. J. Ward, P. Vikas, D. Lanske, S. R. Lautenschlager, H. A. Neal, B. T. Bouwens, T. Hilse, O. Runolfsson, R. M. Brown, A. Joly, Lorne Levinson, C. Beeston, Claudio Grandi, Dave Charlton, O. C. Cooke, A. Skillman, Claire Shepherd-Themistocleous, R. Lahmann, R. Bürgin, Reda Tafirout, Klaus Kurt Desch, D. C. Imrie, J. von Krogh, Gideon Bella, H. J. Burckhart, Jacqueline Batley, A. A. Faust, T. Omori, C. R. Jones, Abish Malik, C. Hartmann, D. E. Plane, G. P. Siroli, L. A. del Pozo, Stephen Hillier, U. Jost, G. M. Dallavalle, R. Mir, R. Hawkings, G. Yekutieli, Hans-Christian Schultz-Coulon, Alan Watson, S. G. Clowes, A. Biguzzi, A. Rooke, Randall Sobie, Michael Schulz, G. D. Lafferty, J. G. Layter, S. Yamashita, A. A. Carter, Ron Folman, Roger Jones, F. G. Oakham, T. Behnke, M. Fierro, J. E.G. Edwards, P. Igo-Kemenes, B. Schmitt, E. L. Barberio, J. Letts, K. Ishii, H. Jeremie, P. E.L. Clarke, M. K. Jones, P. Utzat, S. D. Bird, Kiyotomo Kawagoe, F. X. Gentil, A. Macchiolo, M. Gruwé, C. M. Hawkes, R. E. Hughes-Jones, C. Dallapiccola, J. P. Martin, P. Schenk, S. De Jong, U. Müller, T. J. McMahon, Guenter Duckeck, Richard Nisius, D. Axen, O. Schaile, A. J. Martin, K. Sachs, I. J. Bloodworth, Shlomo Dado, R. K. Carnegie, M. Herndon, A. Jawahery, H. Przysiezniak, Marco Cuffiani, E. do Couto e Silva, A. N. Bell, N. Altekamp, Peter Sherwood, K. Ametewee, Sven Menke, Yoram Rozen, R. J. Barlow, H. Mes, I. P. Duerdoth, Gideon Alexander, Alexander Wagner, G. G. Hanson, D. J. Miller, M. Foucher, Paolo Capiluppi, C. K. Hargrove, Tara Shears, J. Ludwig, P. Fath, K. Runge, P. Bock, C. Sbarra, P. A. Hart, Ehud Duchovni, J. Lauber, G. Giacomelli, Otmar Biebel, D. Karlen, M. J. Pearce, M. Jimack, M. S. Dixit, Frans Meijers, A. Michelini, B. Stockhausen, Paul Kyberd, F. K. Loebinger, W. J. McDonald, Daniel Lellouch, S. M. Gascon-Shotkin, B. C. Shen, D. Rigby, R. J. Hemingway, Giora Mikenberg, J. Steuerer, Satoshi Tanaka, T. Kobayashi, Takehiko Mori, Matthias Schröder, Joleen Pater, Siegfried Bethke, A. K. Honma, B. Nijjhar, V. Zacek, W. G. Scott, M. Thiergen, H. Lafoux, S. D. Talbot, I. Nakamura, R. Giacomelli, B. W. Kennedy, M. Schumacher, E. Lefebvre, P. Jovanovic, James Pinfold, D. Eatough, S. B. Anderson, S. Braibant, A. D. Schaile, P. Szymanski, Gabriella Pasztor, Matthew Evans, D. Chrisman, G. D. Long, Austin Ball, F. Odorici, Volker Blobel, Peter Krieger, N. K. Watson, W. Mohr, D. G. Fong, C. Lewis, D. Glenzinski, Dezso Horvath, A. M. Rossi, Stefan Schmitt, M. J. Losty, Jean-Arcady Meyer, G. A. Snow, C. P. Ward, John Allison, Stephen Lloyd, T. Tsukamoto, P. M. Watkins, Manuella Vincter, A. Posthaus, Alessandro Montanari, S. Söldner-Rembold, J. Gascon, T. J. Smith, Stan Bentvelsen, P. Gagnon, P. Mättig, R. W. Springer, W. Matthews, Shoji Asai, Norbert Wermes, Sherry Towers, T. Kawamoto, R. G. Kellogg, M. A. Thomson, E. K. U. Gross, M. Steiert, A. Sittler, Csaba Hajdu, A. Gaidot, Georges Azuelos, M. Sproston, P. Poffenberger, A. S. Turcot, Stefano Marcellini, S. Orito, E. Tsur, H. M. Bosch, F. Fiedler, M. Verzocchi, Silvia Arcelli, K. W. Bell, J. Pálinkás, M. Rosvick, J. C. Hill, J. W. Gary, Misao Sasaki, N. I. Geddes, Michael Hildreth, D. S. Koetke, M. Hapke, Marcello Mannelli, E. A. Mckigney, D. E. Hutchcroft, P. Schütz, M. Kolrep, N. L. Rodning, W. P. Lai, D. L. Rees, B. Poli, M. J. Oreglia, F. Scharf, German Martinez, J. M. Roney, H. M. Fischer, J. R. Carter, G. N. Patrick, S. A. Robins, Stefan Kluth, P. O. Estabrooks, Shlomit Tarem, A. I. McNab, J. Goldberg, B. Nellen, H. G. Evans, S. W. O'Neale, M. J. Goodrick, I. Cohen, Gunter Wolf, K. Ackerstaff, K. J. Anderson, C. Y. Chang, P. Taras, Michael Kobel, Julie Kirk, K. Stephens, V. Gibson, T. R. Junk, I. Trigger, D. R. Ward, T. Kress, U. Ruppel, M. R. Ingram, S. Robertson, Gregor Herten, B. Wilkens, P. S. Wells, J. E. Pilcher, N. J. Oldershaw, Terry Richard Wyatt, J. E. Bloomer, G. W. Wilson, M. Hauschild, S. A. Wotton, C. Markus, G. T. Jones, E. H. Vokurka, M. Fanti, D. M. Strom, M. Boutemeur, F. S. Merritt, Robert McPherson, R. Rylko, Mathieu Doucet, R. D. Heuer, J. Bechtluft, J. A. McKenna, Fabrizio Fabbri, M. Bobinski, J. A. Wilson, A. Macpherson, R. Bartoldus, P. Scharff-Hansen, R. Van Kooten, Richard Keeler, H. O. Ogren, Christoph Geich-Gimbel, D. Lazic, J. E. Conboy, A. Fürtjes, R. Howard, A. M. Smith, J. S. White, J. Grunhaus, G. Vasseur, F. Wäckerle, Andris Skuja, D. M. Gingrich, Sachio Komamiya, S. Petzold, Theodoros Geralis, E. Ros, Tetsuro Mashimo, P. Berlich, T. P. Kokott, K. Nagai, D. R. Rust, W. Gorn, M. F. Turner-Watson, M. Morii, Peter R Hobson, D. Zer-Zion, P. Routenburg, A. M. Lee, and E. von Törne
Subjects: Quark, Physics, Density matrix, Particle physics, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, Hadron, D-STAR, Polarization (waves), Helicity, Nuclear physics, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: Measurements of helicity density matrix elements have been made for the φ(1020), D*± and B* vector mesons in multihadronic Z0 decays in the OPAL experiment at LEP. Results for inclusive φ produced with high energy show evidence for production preferentially in the helicity zero state, with ρ00 = 0.54 ± 0.08, compared to the value of 1/3 expected for no spin alignment. The corresponding element for the D*± has a value of 0.40 ± 0.02, also suggesting a deviation from 1/3. The B* result, with ρ00 = 0.36 ± 0.09, is consistent with no spin alignment. Off-diagonal elements have been measured for the f and D* mesons; for the D* the element Re ρ1−1 is non-zero, indicating non-independent fragmentation of the primary quarks.
Published: 1997

18. A measurement of |Vcb| using decays

Author: A. I. McNab, A. S. Turcot, J. Goldberg, F. Fiedler, S. Yamashita, B. Nellen, P. Igo-Kemenes, Gideon Bella, H. J. Burckhart, K. Ishii, Jacqueline Batley, H. Jeremie, R. E. Hughes-Jones, M. Kolrep, K. Sachs, Shlomo Dado, M. F. Turner-Watson, M. Morii, H. G. Evans, P. Schenk, P. E.L. Clarke, M. K. Jones, Peter R Hobson, O. Schaile, M. Hapke, Achim Stahl, G. Azuelos, M. J. Goodrick, I. Cohen, J. P. Martin, S. De Jong, E. do Couto e Silva, P. Routenburg, R. Van Kooten, H. Przysiezniak, Sachio Komamiya, T. Omori, D. E. Hutchcroft, O. C. Cooke, A. N. Bell, Theodoros Geralis, E. Ros, A. T. Watson, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, G. D. Lafferty, G. G. Hanson, G. Giacomelli, Reda Tafirout, Klaus Kurt Desch, Giora Mikenberg, M. S. Dixit, Frans Meijers, Sven Menke, C. Y. Chang, P. G. Estabrooks, C. R. Jones, M. J. Oreglia, T. P. Kokott, A. Rooke, J. G. Layter, J. von Krogh, W. Matthews, P. S. Wells, P. Taras, Michael Kobel, Gunter Wolf, F. X. Gentit, A. J. Martin, R. K. Keeler, F. Wäckerle, Ekg Sarkisyan, P. W. Jeffreys, R. J. Hawkings, K. Ackerstaff, Terry Richard Wyatt, D. M. Gingrich, H. Mes, M. A. Thomson, J. E. Bloomer, M. Boutemeur, Ehud Duchovni, D. Rigby, R. J. Hemingway, S. Braibant, J. E.G. Edward, Julie Kirk, H. M. Fischer, T. Behnke, Guenter Duckeck, M. Jimack, P. Fath, L. A. del Pozo, C. Sbarra, U. Ruppel, M. R. Ingram, Matthias Schröder, A. D. Schaile, Gabriella Pasztor, P. Berlich, W. R. Gibson, P. M. Watkins, Paolo Giacomelli, M. Thiergen, E. K. U. Gross, J. R. Carter, J. Grunhaus, G. Yekutieli, G. N. Patrick, J. Bechtluft, A. Michelini, J. A. McKenna, Dave Charlton, B. T. Bouwens, M. Hansroul, P. Poffenberger, M. Gruwé, C. M. Hawkes, A. A. Carter, J. J. Ward, B. Stockhausen, Paul Kyberd, P. Vikas, S. B. Anderson, G. A. Snow, C. P. Ward, F. K. Loebinger, P. Szymanski, Ron Folman, Roger Jones, B. W. Kennedy, P. Jovanovic, R. M. Brown, Lorne Levinson, Otmar Biebel, Satoshi Tanaka, T. Kobayashi, C. Burgard, D. Lanske, P. Schütz, R. J. Homer, I. J. Bloodworth, R. Bartoldus, S. Söldner-Rembold, B. J. King, H. O. Ogren, P. Utzat, Christoph Geich-Gimbel, R. Bürgin, Richard Nisius, A. Gaidot, A. Skillman, Austin Ball, J. Steuerer, F. S. Merritt, D. M. Strom, T. J. McMahon, Stan Bentvelsen, Peter Krieger, M. S. Proston, Marco Cuffiani, LP Duerdoth, Stefan Kluth, C. Hartmann, D. E. Plane, Shlomit Tarem, R. K. Carnegie, M. Schumacher, Joleen Pater, E. Lefebvre, S. Robertson, P. Pfeifenschneider, Stephen Hillier, Gregor Herten, U. Müller, Silvia Arcelli, J. Letts, M. Herndon, G. M. Dallavalle, S. A. Robins, J. E. Conboy, A. Fürtjes, M. Bobinski, J. A. Wilson, R. Rylko, J. Patt, F. Odorici, Manuella Vincter, Norbert Wermes, Alessandro Montanari, Sherry Towers, N. K. Watson, B. Wilkens, K. Ametewee, T. Kawamoto, R. Giacomelli, Robert McPherson, M. Fierro, S. W. O'Neale, A. Biguzzi, Gideon Alexander, K. J. Anderson, Paolo Capiluppi, D. Lazic, S. Orito, S. R. Lautenschlager, H. A. Neal, U. Jost, R. Mir, E. A. Mckigney, M. Rosvick, Yoram Rozen, J. E. Pilcher, Mathieu Doucet, C. K. Hargrove, R. D. Heuer, M. Foucher, D. Chrisman, Tara Shears, Claire Shepherd-Themistocleous, T. Hilse, W. P. Lai, O. Runolfsson, W. Mohr, N. J. Oldershaw, Volker Blobel, Fabrizio Fabbri, P. A. Hart, T. J. Smith, A. Posthaus, K. Stephens, J. M. Roney, C. Beeston, Stephen Lloyd, M. J. Pearce, R. Howard, J. S. White, Claudio Grandi, K. Nagai, F. G. Oakham, B. Schmitt, E. L. Barberio, D. R. Rust, V. Gibson, C. Dallapiccola, D. Karlen, D. L. Rees, T. R. Junk, N. Altekamp, A. Joly, I. Trigger, R. J. Barlow, D. R. Ward, H. Lafoux, D. J. Miller, T. Kress, F. Scharf, German Martinez, A. K. Honma, Daniel Lellouch, G. W. Wilson, M. Hauschild, A. M. Lee, S. A. Wotton, Takehiko Mori, C. Markus, E. von Törne, G. T. Jones, E. H. Vokurka, V. Zacek, R. Lahmann, John Allison, D. C. Imrie, Stefan Schmitt, N. I. Geddes, Michael Hildreth, R. G. Kellogg, M. Steiert, P. Mättig, Shoji Asai, Csaba Hajdu, G. P. Siroli, Stefano Marcellini, N. L. Rodning, B. Poli, S. M. Gascon-Shotkin, Kiyotomo Kawagoe, Matthew Evans, A. M. Rossi, T. Tsukamoto, P. Scharff-Hansen, A. M. Smith, D. Axen, A. Jawahery, G. Vasseur, Peter Sherwood, Andris Skuja, Alexander Wagner, S. Petzold, J. Ludwig, G. D. Long, K. Runge, P. Bock, Tetsuro Mashimo, J. Lauber, W. Gorn, F. Strumia, S. D. Talbot, James Pinfold, D. G. Fong, C. Lewis, J. Gascon, W. J. McDonald, A. Malik, B. C. Shen, J. W. Gary, D. S. Koetke, Marcello Mannelli, P. Gagnon, A. Sittler, Siegfried Bethke, B. Nijjhar, W. G. Scott, I. Nakamura, H. M. Bosch, D. Glenzinski, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, R. W. Springer, E. Tsur, M. Verzocchi, K. W. Bell, J. Pálinkás, J. C. Hill, and Misao Sasaki
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Form factor (quantum field theory), Electron, Rest frame, Nuclear physics, Recoil, High Energy Physics::Experiment, Nuclear Experiment
Abstract: We report a measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb|. From approximately 4.2 million hadronic Z0 decays recorded with the OPAL deteector, a sample is selected containing 1251 ± 125 B 0 → D ∗+ l − ν l candidates, where l is either an electron or a muon. Using Heavy Quark Effective Theory calculations for the decay form factor at zero recoil of the D∗+ meson in the B 0 rest frame, we derive |Vcb| = [36.0 ± 2.1 (stat) ± 2.4 (syst) ± 1.2 (theory)] × 10−3.
Published: 1997

19. An improved measurement of $R_b$ using a double tagging method

Author: S. Yamashita, P. Igo-Kemenes, Richard Keeler, D. M. Strom, R. Howard, R. Rylko, K. Ishii, H. Jeremie, R. E. Hughes-Jones, C. Dallapiccola, Takehiko Mori, M. Hapke, H. Mes, I. P. Duerdoth, P. S. Wells, A. Biguzzi, Terry Richard Wyatt, J. E. Bloomer, V. Zacek, D. E. Hutchcroft, P. Fath, O. Schaile, Silvia Arcelli, Claire Shepherd-Themistocleous, E. do Couto e Silva, Dave Charlton, B. Stockhausen, Paul Kyberd, F. K. Loebinger, K. Sachs, Shlomo Dado, Robert McPherson, N. Altekamp, J. Steuerer, Sven Menke, R. Bürgin, Mathieu Doucet, E. A. Mckigney, Joleen Pater, Stefan Schmitt, R. D. Heuer, R. J. Barlow, A. S. Turcot, M. J. Oreglia, R. Giacomelli, T. J. Smith, Stefan Kluth, Fabrizio Fabbri, W. P. Lai, F. Fiedler, Shlomit Tarem, Giora Mikenberg, D. J. Miller, T. Behnke, P. Mättig, Shoji Asai, J. Grunhaus, J. M. Roney, K. Nagai, I. J. Bloodworth, S. Braibant, John Allison, A. D. Schaile, T. Kawamoto, Gabriella Pasztor, Gideon Bella, D. R. Rust, Kiyotomo Kawagoe, H. J. Burckhart, P. Gagnon, M. Schumacher, E. Lefebvre, M. Gruwé, Andris Skuja, M. Kolrep, Jacqueline Batley, J. R. Carter, G. N. Patrick, S. Petzold, P. Schenk, C. M. Hawkes, K. Ackerstaff, G. D. Long, K. Stephens, R. G. Kellogg, Yoram Rozen, M. Steiert, F. Odorici, G. A. Snow, C. P. Ward, Tetsuro Mashimo, Otmar Biebel, Csaba Hajdu, T. Omori, A. Sittler, P. G. Estabrooks, A. M. Lee, Richard Nisius, P. Poffenberger, Stefano Marcellini, M. Foucher, S. B. Anderson, S. Söldner-Rembold, P. Szymanski, E. von Törne, S. Robertson, V. Gibson, P. M. Watkins, H. M. Bosch, C. R. Jones, Marco Cuffiani, D. Karlen, Gregor Herten, W. Gorn, D. Rigby, R. J. Hemingway, A. Joly, G. W. Wilson, J. Letts, Stan Bentvelsen, U. Müller, Norbert Wermes, T. R. Junk, A. J. Martin, Sherry Towers, A. I. McNab, P. Schütz, J. Goldberg, D. Axen, I. Trigger, R. Van Kooten, A. Jawahery, Hans-Christian Schultz-Coulon, B. Nellen, Randall Sobie, Michael Schulz, G. D. Lafferty, M. F. Turner-Watson, S. Orito, B. Wilkens, D. R. Ward, T. Kress, M. Morii, B. W. Kennedy, James Pinfold, M. Rosvick, Achim Stahl, Peter R Hobson, P. Jovanovic, U. Ruppel, Peter Sherwood, R. Lahmann, M. R. Ingram, D. G. Fong, C. Lewis, P. Routenburg, Alexander Wagner, H. G. Evans, M. J. Goodrick, J. Gascon, C. K. Hargrove, Guenter Duckeck, Sachio Komamiya, Theodoros Geralis, E. Ros, J. E. Pilcher, Austin Ball, J. Ludwig, K. Runge, I. Cohen, P. Bock, G. P. Siroli, Matthias Schröder, N. I. Geddes, J. Lauber, N. J. Oldershaw, Peter Krieger, Michael Hildreth, M. Thiergen, H. Lafoux, T. P. Kokott, J. W. Gary, D. S. Koetke, E. Gross, Marcello Mannelli, D. Lellouch, N. L. Rodning, F. Strumia, S. D. Talbot, F. Wäckerle, B. Poli, Manuella Vincter, D. M. Gingrich, P. Scharff-Hansen, Alessandro Montanari, Tara Shears, P. A. Hart, A. M. Smith, S. M. Gascon-Shotkin, U. Jost, P. Berlich, R. Mir, G. Vasseur, M. J. Pearce, Matthew Evans, A. M. Rossi, M. Hauschild, T. Tsukamoto, Paolo Giacomelli, S. W. O'Neale, M. Hansroul, K. J. Anderson, S. A. Wotton, C. Markus, H. M. Fischer, G. T. Jones, E. H. Vokurka, C. Y. Chang, F. G. Oakham, B. Schmitt, S. A. Robins, C. Burgard, E. L. Barberio, R. J. Homer, P. Taras, Michael Kobel, P. Pfeifenschneider, Julie Kirk, J. Patt, F. S. Merritt, J. Bechtluft, J. A. McKenna, R. Bartoldus, H. O. Ogren, Christoph Geich-Gimbel, J. E. Conboy, N. K. Watson, F. X. Gentit, A. Fürtjes, W. Mohr, W. J. McDonald, B. C. Shen, Siegfried Bethke, A. K. Honma, B. Nijjhar, A. Posthaus, W. G. Scott, I. Nakamura, D. Glenzinski, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, R. W. Springer, D. L. Rees, Georges Azuelos, E. Tsur, M. Verzocchi, K. W. Bell, J. Pálinkás, J. C. Hill, Misao Sasaki, F. Scharf, German Martinez, W. Matthews, M. A. Thomson, A. Gaidot, M. Sproston, C. Sbarra, G. Yekutieli, A. A. Carter, Ron Folman, Roger Jones, B. J. King, P. Utzat, T. J. McMahon, R. K. Carnegie, M. Herndon, M. Bobinski, J. A. Wilson, D. Lazic, O. C. Cooke, J. von Krogh, R. J. Hawkings, L. A. del Pozo, Ehud Duchovni, M. Jimack, A. Michelini, D. C. Imrie, Satoshi Tanaka, J. S. White, M. Boutemeur, T. Kobayashi, M. Fierro, J. E.G. Edwards, S. R. Lautenschlager, H. A. Neal, T. Hilse, O. Runolfsson, D. Chrisman, Volker Blobel, C. Beeston, Claudio Grandi, Stephen Lloyd, Ekg Sarkisyan, P. W. Jeffreys, Robert M Brown, K. Ametewee, Gideon Alexander, Paolo Capiluppi, J. J. Ward, P. Vikas, D. Lanske, W. R. Gibson, B. T. Bouwens, Lorne Levinson, A. Skillman, Abish Malik, C. Hartmann, D. E. Plane, Stephen Hillier, G. M. Dallavalle, Alan Watson, G. G. Hanson, Reda Tafirout, Klaus Kurt Desch, G. Wolf, G. Giacomelli, M. S. Dixit, Frans Meijers, P. E.L. Clarke, M. K. Jones, J. P. Martin, S. De Jong, H. Przysiezniak, A. N. Bell, A. Rooke, and J. G. Layter
Subjects: Nuclear physics, Physics, Top quark, Particle physics, Physics and Astronomy (miscellaneous), Meson, Bottom quark, Particle Physics - Experiment
Published: 1997

20. Measurement of the triple gauge boson coupling αW from W+W− production in e+e− collisions at =161GeV

Author: S. A. Robins, J. R. Carter, Michael Hildreth, R. Bartoldus, N. L. Rodning, B. Poli, K. Nagai, N. K. Watson, Otmar Biebel, Shigenori Tanaka, S. M. Gascon-Shotkin, U. Müller, P. Igo-Kemenes, S. R. Lautenschlager, H. A. Neal, D. R. Rust, Matthew Evans, A. M. Rossi, T. Tsukamoto, H. O. Ogren, Christoph Geich-Gimbel, A. J. Martin, K. Ishii, H. Jeremie, T. Hilse, R. E. Hughes-Jones, M. Schumacher, E. Lefebvre, T. Behnke, O. C. Cooke, V. Gibson, A. Biguzzi, O. Runolfsson, Gideon Bella, A. M. Lee, H. J. Burckhart, E. von Törne, Jacqueline Batley, J. Letts, James Pinfold, W. Matthews, U. Ruppel, M. R. Ingram, D. G. Fong, C. Lewis, O. Schaile, F. Odorici, E. do Couto e Silva, S. Robertson, S. L. Lloyd, P. Schütz, P. Gagnon, A. Rooke, J. G. Layter, J. E. Conboy, A. Fürtjes, Gregor Herten, J. Allison, C. K. Hargrove, C. Hartmann, K. Ametewee, J. Gascon, D. E. Plane, A. Macchiolo, Sven Menke, Matthias Schröder, A. Sittler, B. Wilkens, T. Omori, Gideon Alexander, M. Sasaki, J. Palinkas, Norbert Wermes, Sherry Towers, Paolo Capiluppi, M. A. Thomson, Claudio Grandi, M. Thiergen, K. Sachs, M. Boutemeur, F. S. Merritt, T. Kawamoto, V. Zacek, R. Van Kooten, J. A. McKenna, Stephen Hillier, J. E. Pilcher, Shlomo Dado, C. R. Jones, G. M. Dallavalle, Ekg Sarkisyan, Richard Nisius, P. W. Jeffreys, J. Bechtluft, S. Orito, H. M. Bosch, M. Rosvick, S. W. O'Neale, J. von Krogh, D. S. Koetke, G. W. Wilson, T. Kobayashi, Marcello Mannelli, G. G. Hanson, H. Mes, M. Hauschild, R. G. Kellogg, M. Steiert, I. P. Duerdoth, R. W.L. Jones, S. A. Wotton, Marco Cuffiani, P. Fath, D. Chrisman, G. D. Long, E. K. U. Gross, Kiyotomo Kawagoe, C. Markus, D. M. Strom, C.J. Beeston, Csaba Hajdu, G. Giacomelli, J. Lauber, Volker Blobel, M. Hapke, Dave Charlton, K. J. Anderson, T. G. Shears, Stefano Marcellini, P. Scharff-Hansen, G. T. Jones, E. H. Vokurka, P. A. Hart, G. Mikenberg, T. J. Smith, N. J. Oldershaw, B. Nijjhar, M. J. Pearce, F. Wäckerle, Joleen Pater, M. Sproston, Claire Shepherd-Themistocleous, K. Stephens, L. A. del Pozo, C. Y. Chang, D. M. Gingrich, B. Stockhausen, Paul Kyberd, F. K. Loebinger, A. M. Smith, M. S. Dixit, Frans Meijers, R. Bürgin, M. J. Oreglia, W. R. Gibson, P. Taras, Michael Kobel, J. Steuerer, J. J. Ward, S. D. Talbot, Ehud Duchovni, R. Rylko, P. E.L. Clarke, M. K. Jones, P. Vikas, S. Braibant, A. D. Schaile, A. A. Faust, B. T. Bouwens, M. Jimack, P. Berlich, P. Poffenberger, M. Fanti, Andris Skuja, J. P. Martin, Gabriella Pasztor, R. Giacomelli, R. Lahmann, Julie Kirk, D. Lanske, A. Michelini, Gunter Wolf, K. Ackerstaff, Satoru Yamashita, S. Petzold, D. Eatough, S. De Jong, G. Yekutieli, Tetsuro Mashimo, G. N. Patrick, D. C. Imrie, R. M. Brown, Lorne Levinson, T. R. Junk, H. Przysiezniak, G. A. Snow, C. P. Ward, A. A. Carter, Ron Folman, Robert McPherson, G. P. Siroli, A. N. Bell, I. Trigger, A. Skillman, A. Joly, Mathieu Doucet, S. Söldner-Rembold, W. Gorn, S. D. Bird, R. D. Heuer, N. I. Geddes, P. Schenk, C. Sbarra, P. S. Wells, Fabrizio Fabbri, D. R. Ward, T. Kress, D. L. Rees, P. Utzat, A. T. Watson, Reda Tafirout, Klaus Kurt Desch, J. E. Bloomer, F. Scharf, German Martinez, D. Axen, A. I. McNab, A. Macpherson, J. Goldberg, A. Jawahery, T. R. Wyatt, T. J. McMahon, J. M. Roney, R. J. Sobie, B. Nellen, R. K. Carnegie, M. Herndon, R. Howard, M. Bobinski, R. J. Barlow, J. A. Wilson, J. S. White, W. Mohr, Peter Sherwood, A. Posthaus, D. Lazic, Alexander Wagner, M. Fierro, J. E.G. Edwards, J. Ludwig, K. Runge, P. Bock, H. G. Evans, M. J. Goodrick, I. Cohen, Stefan Kluth, Shlomit Tarem, R. W. Springer, Achim Stahl, Daniel Lellouch, Paolo Giacomelli, M. Hansroul, C. Burgard, Takehiko Mori, R. J. Homer, Georges Azuelos, E. Tsur, C. M. Hawkes, P. Pfeifenschneider, J. Patt, M. Verzocchi, K. W. Bell, J. C. Hill, B. C. Shen, Siegfried Bethke, A. K. Honma, W. G. Scott, I. Nakamura, J. W. Gary, D. Glenzinski, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, Sachio Komamiya, Stefan Schmitt, Theodoros Geralis, M. Gruwe, E. Ros, U. Jost, R. Mir, T. P. Kokott, R. Hawkings, W.J. McDonald, P. Mättig, Shoji Asai, J. Grunhaus, I. J. Bloodworth, S. B. Anderson, P. Szymanski, Stan Bentvelsen, F. G. Oakham, Hans-Christian Schultz-Coulon, B. Schmitt, E. L. Barberio, Michael Schulz, Yoram Rozen, G. Duckeck, M. Foucher, M. F. Turner-Watson, M. Morii, Peter R Hobson, D. Zer-Zion, P. Routenburg, D. Karlen, D. Rigby, R. J. Hemingway, B. W. Kennedy, P. Jovanovic, A. S. Turcot, F. Fiedler, Austin Ball, Peter Krieger, Manuella Vincter, Alessandro Montanari, M. Kolrep, D. E. Hutchcroft, C. Dallapiccola, N. Altekamp, D. J. Miller, P. G. Estabrooks, R. K. Keeler, P. M. Watkins, Silvia Arcelli, E. A. Mckigney, W. P. Lai, G. D. Lafferty, and H. M. Fischer
Subjects: Semileptonic decay, Coupling, Physics, Nuclear and High Energy Physics, Particle physics, Gauge boson, Luminosity (scattering theory), Electron–positron annihilation, law.invention, Standard Model, Nuclear physics, Coupling parameter, law, High Energy Physics::Experiment, Collider
Abstract: This letter describes a measurement of one of the anomalous triple gauge boson couplings using the first data recorded by the OPAL detector at LEP2. A total of 28 W-pair candidates have been selected for an integrated luminosity of 9.89+/-0.06 pb(-1) recorded at a centre-of-mass energy of 161 GeV. We use these data to place constraints upon the coupling parameter alpha(W phi). We analyse the predicted variation of the total cross-section for all observed channels and the distribution of kinematic variables in the semileptonic decay channels. We measure alpha(W phi) to be -0.61(-0.61)(+0.73)+/-0.35, which is consistent with the Standard Model expectation of zero. (C) 1997 Published by Elsevier Science B.V.
Published: 1997

21. Search for charged scalar leptons using the OPAL detector at GeV

Author: D. Rigby, R. J. Hemingway, V Zacek, B. W. Kennedy, R. Bartoldus, R. Lahmann, D. C. Imrie, G. P. Siroli, John Allison, P. Jovanovic, Austin Ball, J. Grunhaus, Christoph Geich-Gimbel, Peter Krieger, Manuella Vincter, Alessandro Montanari, D. Axen, A. Jawahery, R. G. Kellogg, M. Steiert, Gunter Wolf, Tara Shears, A. Biguzzi, K. Ackerstaff, Peter Sherwood, Alexander Wagner, Csaba Hajdu, K. Sachs, Shlomo Dado, I. J. Bloodworth, J. E. Conboy, A. Fürtjes, J. Ludwig, Claire Shepherd-Themistocleous, H.O Ogren, Stefano Marcellini, S. Robertson, K. Runge, P. Bock, Gregor Herten, Yoram Rozen, M. Foucher, P. A. Hart, Gideon Bella, M. J. Pearce, B. Wilkens, Giora Mikenberg, D. Karlen, H. J. Burckhart, Jacqueline Batley, Sachio Komamiya, Theodoros Geralis, E. Ros, A. T. Watson, T. Behnke, Daniel Lellouch, S. Braibant, A. D. Schaile, J. E. Pilcher, T. P. Kokott, G. Azuelos, Takehiko Mori, C. Sbarra, T. Omori, Gabriella Pasztor, R. W. Springer, M. Gruwé, C. M. Hawkes, G. A. Snow, C. P. Ward, G. Yekutieli, G. G. Hanson, C. R. Jones, U. Müller, S. Söldner-Rembold, P. Gagnon, Richard Nisius, A. A. Carter, Ron Folman, Roger Jones, A. Sittler, G. Giacomelli, C. Dallapiccola, Stefan Schmitt, A. I. McNab, J. Goldberg, Silvia Arcelli, Marco Cuffiani, H. M. Bosch, B. Nellen, B. J. King, M. Boutemeur, F. S. Merritt, Reda Tafirout, Klaus Kurt Desch, E. Tsur, M. S. Dixit, A. J. Martin, S. W. O'Neale, P. Utzat, Frans Meijers, Dave Charlton, M. Verzocchi, A. S. Turcot, F. Fiedler, J. Lauber, K. J. Anderson, P. Mättig, S Anderson, M. F. Turner-Watson, K. W. Bell, M. Morii, J. Pálinkás, A. Rooke, Peter R Hobson, J. G. Layter, Shoji Asai, P. Routenburg, R. Bürgin, N. Altekamp, F. Strumia, G. W. Wilson, E. A. Mckigney, S. D. Talbot, O. C. Cooke, M. Hauschild, J. C. Hill, S. A. Wotton, P. Poffenberger, W. R. Gibson, Misao Sasaki, H. G. Evans, J. Bechtluft, R. J. Barlow, W. P. Lai, J. A. McKenna, M. J. Goodrick, P. E.L. Clarke, D. J. Miller, C. Markus, M. K. Jones, P. Schütz, B. T. Bouwens, J. P. Martin, I. Cohen, M. Kolrep, S. De Jong, G. T. Jones, E. H. Vokurka, R. M. Brown, Lorne Levinson, A. Joly, J. M. Roney, J. von Krogh, C. K. Hargrove, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, G. D. Lafferty, H. Przysiezniak, N. J. Oldershaw, C. Y. Chang, A. N. Bell, M. Hapke, P. Schenk, Paolo Giacomelli, D. E. Hutchcroft, A. Skillman, P. Taras, Michael Kobel, M. Hansroul, B. Stockhausen, Paul Kyberd, F. K. Loebinger, C. Hartmann, D. E. Plane, P. S. Wells, Stephen Hillier, Julie Kirk, J. Steuerer, Joleen Pater, R. J. Hawkings, Guenter Duckeck, C. Burgard, W. J. McDonald, G. M. Dallavalle, B. C. Shen, Terry Richard Wyatt, M. J. Oreglia, R. Giacomelli, L. A. del Pozo, R. J. Homer, Siegfried Bethke, A. K. Honma, B. Nijjhar, W. G. Scott, J. E. Bloomer, I. Nakamura, Andris Skuja, S. Petzold, G. D. Long, Tetsuro Mashimo, D. Glenzinski, Dezso Horvath, M. J. Losty, N. I. Geddes, Michael Hildreth, Jean-Arcady Meyer, U. Jost, R. Mir, Stefan Kluth, J. R. Carter, N. L. Rodning, Shlomit Tarem, B. Poli, G. N. Patrick, W. Gorn, P. Szymanski, Matthias Schröder, F. G. Oakham, B. Schmitt, Otmar Biebel, M. Thiergen, E. L. Barberio, S. M. Gascon-Shotkin, Stan Bentvelsen, P. Pfeifenschneider, R. Howard, J. S. White, J. Patt, Matthew Evans, A. M. Rossi, T. Tsukamoto, J. Letts, H. M. Fischer, D. M. Strom, Norbert Wermes, Sherry Towers, T. Kawamoto, P. Scharff-Hansen, R. Rylko, S. A. Robins, S. Orito, M. Rosvick, A. M. Smith, Achim Stahl, James Pinfold, D. G. Fong, C. Lewis, J. Gascon, J. W. Gary, D. S. Koetke, Marcello Mannelli, Ekg Sarkisyan, P. W. Jeffreys, J. J. Ward, P. Vikas, D. Lanske, S. R. Lautenschlager, H. A. Neal, T. Hilse, T. J. McMahon, O. Runolfsson, R. K. Carnegie, M. Herndon, C. Beeston, U. Ruppel, Claudio Grandi, M. Bobinski, J. A. Wilson, M. R. Ingram, D. Lazic, M. Fierro, J. E.G. Edwards, T. J. Smith, K. Stephens, V. Gibson, T. R. Junk, I. Trigger, D. R. Ward, T. Kress, D. Chrisman, Volker Blobel, Stephen Lloyd, S. Yamashita, P. Igo-Kemenes, Ehud Duchovni, K. Ishii, H. Jeremie, M. Jimack, A. Michelini, R. E. Hughes-Jones, O. Schaile, E. do Couto e Silva, Satoshi Tanaka, T. Kobayashi, Sven Menke, K. Ametewee, Gideon Alexander, Paolo Capiluppi, P. G. Estabrooks, R. K. Keeler, P. M. Watkins, Kiyotomo Kawagoe, D. L. Rees, F. Scharf, German Martinez, N. K. Watson, W. Mohr, A. Posthaus, H. Mes, I. P. Duerdoth, P. Fath, R. Van Kooten, W. Matthews, M. A. Thomson, E. K. U. Gross, M. Sproston, F. Wäckerle, D. M. Gingrich, P. Berlich, M. Schumacher, E. Lefebvre, F. Odorici, K. Nagai, D. R. Rust, A. M. Lee, E. von Törne, Robert McPherson, Mathieu Doucet, R. D. Heuer, and Fabrizio Fabbri
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Missing energy, Muon, High Energy Physics::Phenomenology, Detector, Scalar (physics), Electron, Nuclear physics, Selectron tube, High Energy Physics::Experiment, Minimal Supersymmetric Standard Model, Lepton
Abstract: A search for pair-produced scalar electron, muon and tau leptons has been performed using a data sample corresponding to an integrated luminosity of 10.1 pb−1 at a centre-of-mass energy of s =161 GeV collected with the OPAL detector at LEP. Such events would yield an acoplanar pair of leptons with significant missing energy in the final state. No excess of acoplanar lepton pair events has been observed in the data. Limits are presented on the production cross-sections of charged scalar leptons. Exclusion regions are also presented in the framework of the Minimal Supersymmetric Standard Model. A 95% C.L. lower limit on the right-handed selectron mass of 71.5 GeV is obtained for tan β ≥ 1.5, |μ| ≥ 200 GeV and m χ 1 0 = 12.0 GeV . A 95% C.L. lower limit on the right-handed smuon mass of 51.0 GeV is obtained for m χ 1 0 = 12.0 GeV , independent of tan β and μ.
Published: 1997

22. Inclusive jet production in photon-photon collisions at $\sqrt s_{\rm ee}=130$ and 136 GeV

Author: G. G. Hanson, G. Giacomelli, T. Behnke, D. M. Strom, M. S. Dixit, Frans Meijers, Silvia Arcelli, R. Rylko, Stefan Schmitt, S. Yamashita, U. Müller, M. Gruwé, C. M. Hawkes, S. R. Lautenschlager, H. A. Neal, P. Igo-Kemenes, K. Ishii, H. Jeremie, P. E.L. Clarke, M. K. Jones, D. Rigby, R. J. Hemingway, W. J. McDonald, B. C. Shen, N. J. Oldershaw, T. J. Smith, P. S. Wells, Terry Richard Wyatt, J. E. Bloomer, R. E. Hughes-Jones, Richard Nisius, J. P. Martin, A. J. Martin, Paolo Giacomelli, M. Hansroul, S. Braibant, A. D. Schaile, Gabriella Pasztor, T. Hilse, O. Runolfsson, B. W. Kennedy, A. I. McNab, S. De Jong, P. Jovanovic, J. Goldberg, O. Schaile, Marco Cuffiani, Dave Charlton, Austin Ball, E. do Couto e Silva, C. Burgard, R. Howard, A. S. Turcot, J. S. White, P. Poffenberger, F. Fiedler, B. Nellen, P. Mättig, O. C. Cooke, Siegfried Bethke, A. K. Honma, B. Nijjhar, W. G. Scott, Peter Krieger, Shoji Asai, M. Hapke, I. Nakamura, R. Bürgin, E. A. Mckigney, H. Przysiezniak, C. K. Hargrove, Sven Menke, R. Bartoldus, C. Beeston, Matthias Schröder, D. E. Hutchcroft, G. A. Snow, C. P. Ward, M. F. Turner-Watson, R. J. Homer, Claudio Grandi, Manuella Vincter, Alessandro Montanari, M. Thiergen, M. Morii, A. N. Bell, Peter R Hobson, M. J. Oreglia, W. P. Lai, I. J. Bloodworth, U. Jost, R. Lahmann, P. Schütz, S. Söldner-Rembold, H. G. Evans, R. Mir, G. W. Wilson, M. Hauschild, D. Glenzinski, D. C. Imrie, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, John Allison, P. Routenburg, Claire Shepherd-Themistocleous, Gideon Bella, H. O. Ogren, S. M. Gascon-Shotkin, M. J. Goodrick, Christoph Geich-Gimbel, I. Cohen, Sachio Komamiya, S. A. Wotton, Theodoros Geralis, C. Markus, E. Ros, A. T. Watson, James Pinfold, H. J. Burckhart, Jacqueline Batley, J. von Krogh, J. R. Carter, H. Mes, A. Rooke, G. T. Jones, J. G. Layter, G. P. Siroli, G. N. Patrick, P. Gagnon, I. P. Duerdoth, J. E. Conboy, Otmar Biebel, T. P. Kokott, E. H. Vokurka, Gunter Wolf, D. G. Fong, C. Lewis, R. W. Springer, K. Ackerstaff, J. M. Roney, M. Kolrep, T. Omori, Yoram Rozen, Tara Shears, R. G. Kellogg, P. Fath, M. Steiert, Csaba Hajdu, F. G. Oakham, R. J. Hawkings, Matthew Evans, A. Sittler, B. Schmitt, E. L. Barberio, A. M. Rossi, Achim Stahl, P. A. Hart, A. Fürtjes, Stefano Marcellini, J. Gascon, C. Y. Chang, M. Foucher, T. Tsukamoto, Georges Azuelos, E. Tsur, C. Dallapiccola, P. Schenk, C. R. Jones, Kiyotomo Kawagoe, M. Verzocchi, K. W. Bell, K. Sachs, S. Robertson, S. B. Anderson, L. A. del Pozo, M. J. Pearce, M. Fierro, J. E.G. Edwards, A. Malik, Gregor Herten, Shlomo Dado, J. Letts, H. M. Bosch, J. Pálinkás, J. Grunhaus, B. Stockhausen, Paul Kyberd, P. Szymanski, F. K. Loebinger, Ekg Sarkisyan, P. W. Jeffreys, T. J. McMahon, J. Steuerer, N. I. Geddes, Norbert Wermes, Sherry Towers, B. Wilkens, P. Taras, T. Kawamoto, P. G. Estabrooks, Michael Hildreth, Michael Kobel, N. Altekamp, Joleen Pater, J. C. Hill, Misao Sasaki, M. Boutemeur, F. S. Merritt, D. Karlen, N. L. Rodning, R. Giacomelli, R. K. Carnegie, S. Orito, M. Rosvick, R. J. Barlow, R. K. Keeler, J. E. Pilcher, B. Poli, M. Herndon, D. Axen, A. Jawahery, D. J. Miller, Julie Kirk, U. Ruppel, M. R. Ingram, J. W. Gary, J. Bechtluft, J. A. McKenna, J. J. Ward, Daniel Lellouch, M. Bobinski, P. Vikas, J. A. Wilson, D. Lanske, A. Joly, Peter Sherwood, H. M. Fischer, P. M. Watkins, Stan Bentvelsen, Takehiko Mori, Giora Mikenberg, Alexander Wagner, D. S. Koetke, M. Schumacher, J. Ludwig, K. Runge, P. Bock, Marcello Mannelli, Stefan Kluth, S. A. Robins, J. Lauber, V. Zacek, E. Lefebvre, Shlomit Tarem, F. X. Gentit, Andris Skuja, S. W. O'Neale, P. Pfeifenschneider, D. Lazic, K. J. Anderson, F. Odorici, F. Strumia, S. D. Talbot, S. Petzold, C. Sbarra, J. Patt, G. D. Long, K. Stephens, Hans-Christian Schultz-Coulon, Tetsuro Mashimo, G. Yekutieli, Randall Sobie, Michael Schulz, G. D. Lafferty, V. Gibson, T. R. Junk, A. A. Carter, Ron Folman, Roger Jones, I. Trigger, W. Gorn, Guenter Duckeck, D. R. Ward, T. Kress, B. J. King, P. Utzat, H. Lafoux, P. Scharff-Hansen, A. M. Smith, G. Vasseur, K. Ametewee, Gideon Alexander, Paolo Capiluppi, Ehud Duchovni, M. Jimack, A. Michelini, Satoshi Tanaka, T. Kobayashi, D. Chrisman, Volker Blobel, Stephen Lloyd, Robert M Brown, Robert McPherson, Mathieu Doucet, R. D. Heuer, Fabrizio Fabbri, R. Van Kooten, W. R. Gibson, B. T. Bouwens, F. Wäckerle, D. M. Gingrich, Lorne Levinson, P. Berlich, A. Skillman, K. Nagai, Reda Tafirout, Klaus Kurt Desch, D. R. Rust, A. M. Lee, E. von Törne, C. Hartmann, D. E. Plane, Stephen Hillier, G. M. Dallavalle, N. K. Watson, W. Mohr, A. Posthaus, W. Matthews, M. A. Thomson, E. K. U. Gross, A. Gaidot, M. Sproston, D. L. Rees, F. Scharf, and German Martinez
Subjects: Physics, Nuclear physics, Transverse plane, Photon, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, Detector, Perturbative QCD, High Energy Physics::Experiment, HERA, Jet (particle physics), Particle Physics - Experiment
Abstract: The inclusive one- and two-jet production cross-sections are measured in collisions of quasi-real photons radiated from the LEP beams at e+e- centre-of-mass energies √see = 130 and 136 GeV using the OPAL detector at LEP. Hard jets are reconstructed using a cone jet finding algorithm. The differential jet cross-sections dσ/dETjet are compared to next-to-leading order perturbative QCD calculations. Transverse energy flows in jets are studied separately for direct and resolved two-photon events. © Springer-Verlag 1997.
Published: 1997

23. Search for unstable neutral and charged heavy leptons in e+e− collisions at =164

Author: R. K. Carnegie, M. Bobinski, J. A. Wilson, O. C. Cooke, J. von Krogh, R. J. Hawkings, L. A. del Pozo, Gideon Bella, H. J. Burckhart, G. Yekutieli, Jacqueline Batley, James Pinfold, Otmar Biebel, A. A. Carter, Ron Folman, B. J. King, P. Utzat, N. J. Oldershaw, D. G. Charlton, D. G. Fong, C. Lewis, Paolo Giacomelli, Marco Verzocchi, M. Hansroul, J. Grunhaus, J. Gascon, J.A. Lauber, P. Szymanski, C. H. Shepherd-Themistocleous, C. R. Jones, Michael Schulz, J. M. Roney, Tsunehiko Omori, R. J. Homer, H. Fischer, A. I. McNab, S. H. Robertson, J. Goldberg, Sherry Towers, V. Zacek, A. Rooke, J. G. Layter, J. Steuerer, T. Kawamoto, B. Nellen, Stefan Schmitt, P. Igo-Kemenes, K. Ishii, H. Jeremie, S. Orito, M. Rosvick, W.J. McDonald, T. Behnke, R. E. Hughes-Jones, H. G. Evans, Marcello Mannelli, Richard Nisius, M. J. Kobel, P. Mättig, Shoji Asai, M. J. Goodrick, I. Cohen, V. Gibson, S. Komamiya, I. J. Bloodworth, P. E. L. Clarke, W. Mohr, Marco Cuffiani, E. do Couto e Silva, Andris Skuja, G. Duckeck, R. W. L. Jones, Shigenori Tanaka, R. Bürgin, S. Petzold, Markus Schumacher, Sven Menke, R. Bartoldus, G. D. Long, Yoram Rozen, M. F. Turner-Watson, Meirin Oan Evans, D. R. Rust, M. Morii, K. Ametewee, Peter R Hobson, A. Posthaus, J. W. Gary, M. Foucher, H. O. Ogren, Christoph Geich-Gimbel, Tetsuro Mashimo, U. Jost, R. Mir, Carla Sbarra, J. E. Conboy, Gideon Alexander, Paolo Capiluppi, S. L. Lloyd, G. W. Wilson, A. Fürtjes, T. Geralis, R. D. Heuer, F. G. Oakham, E. L. Barberio, W. Matthews, H. Mes, Matthias Schröder, F. S. Merritt, A. Skillman, M. Hapke, D. Rigby, R. J. Hemingway, A. Stahl, P. Vikas, P. Pfeifenschneider, M. Thiergen, J. Bechtluft, W. Gorn, J. A. McKenna, F. Strumia, S. D. Talbot, P. Jovanovic, J. Patt, Peter Krieger, E. von Törne, M. J. Oreglia, P. Schütz, S. Braibant, K. Ackerstaff, Manuella Vincter, Daniel Lellouch, Alessandro Montanari, Takehiko Mori, D. E. Hutchcroft, C. Dallapiccola, M. Sproston, P. S. Wells, G. Mikenberg, G. N. Patrick, P.A. Hart, P. Routenburg, A. T. Watson, M. Gruwe, J. E. Bloomer, D. Glenzinski, Stan Bentvelsen, A. K. Honma, N. Altekamp, A. D. Schaile, A. S. Turcot, T. P. Kokott, Satoru Yamashita, B. Schmitt, H-C. Schultz-Coulon, Stefan Kluth, Shlomit Tarem, D. M. Strom, Matthew Herndon, R. Rylko, J.P. Martin, U. Müller, A. J. Martin, H. Przysiezniak, C. K. Hargrove, M. Kolrep, B. Nijjhar, M. J. Pearce, U. Ruppel, M. R. Ingram, R. J. Sobie, R. Howard, J. S. White, A. N. Bell, Eduardo Ros, D. Axen, A. Jawahery, BT Bouwens, N. K. Watson, R. Van Kooten, S. M. Gascon-Shotkin, R. W. Springer, J. Ludwig, K. Runge, P. Bock, S. B. Anderson, C.J. Beeston, T. G. Shears, A. M. Rossi, G. G. Hanson, T. Tsukamoto, F. Scharf, German Martinez, Eugene P. Gross, F. Wäckerle, Norbert Wermes, A. Michelini, Gy. Wolf, P. Berlich, G. Giacomelli, T. J. Smith, K. Stephens, D. Karlen, O. Schaile, P. Schenk, P. Gagnon, T. R. Junk, J. Allison, S. A. Robins, Robert McPherson, A. Sittler, Mathieu Doucet, Fabrizio Fabbri, Gregor Herten, P. Kyberd, H. M. Bosch, M. S. Dixit, Frans Meijers, B. Wilkens, J. R. Carter, P. Scharff-Hansen, D. Lazic, J. E. Pilcher, A. Joly, D. R. Ward, M. Hauschild, S. A. Wotton, C. Markus, G. T. Jones, N. I. Geddes, E. H. Vokurka, P R Poffenberger, S. J. De Jong, A. M. Smith, Frank Fiedler, B. Stockhausen, F. K. Loebinger, I. P. Duerdoth, B. C. Shen, Joleen Pater, P. Fath, Peter Sherwood, Siegfried Bethke, W. G. Scott, I. Nakamura, A. H. Ball, Silvia Arcelli, R. Giacomelli, Dezso Horvath, M. J. Losty, E. A. Mckigney, E. Lefebvre, W. P. Lai, F. Odorici, Jean-Arcady Meyer, G. D. Lafferty, Carsten Daniel Burgard, P. G. Estabrooks, R. K. Keeler, P. M. Watkins, M. Jimack, D Chrisman, Kiyotomo Kawagoe, A. P. Wagner, Matthew Jones, D. C. Imrie, R. G. Kellogg, M. Steiert, D. J. Miller, Doug Gingrich, G. P. Siroli, Reda Tafirout, Klaus Kurt Desch, D. S. Koetke, Csaba Hajdu, T. Kress, Stefano Marcellini, T. R. Wyatt, K. Nagai, Michael Hildreth, James Letts, Georges Azuelos, N. L. Rodning, E. Tsur, C. M. Hawkes, R. J. Barlow, Isabel Marian Trigger, K. W. Bell, J. C. Hill, B. Poli, M. Boutemeur, M. Fierro, W. R. Gibson, Ehud Duchovni, J. E.G. Edwards, S. J. Hillier, Lorne Levinson, B. W. Kennedy, M. Sasaki, C. Y. Chang, Volker Blobel, P. Taras, Robert M Brown, J. Palinkas, K. Sachs, Shlomo Dado, Ekg Sarkisyan, P. W. Jeffreys, T. Kobayashi, C. Hartmann, D. E. Plane, Julie Kirk, G. M. Dallavalle, A. M. Lee, O. Runolfsson, Robert Lahmann, J. J. Ward, M. A. Thomson, D. Lanske, Gabriella Pasztor, G. A. Snow, S. R. Lautenschlager, H. A. Neal, C. P. Ward, D. L. Rees, S. Söldner-Rembold, S. W. O'Neale, K. J. Anderson, T. Hilse, Claudio Grandi, and T. J. McMahon
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Lepton
Published: 1997

24. Search for the Standard Model Higgs boson in e+e− collisions at =161

Author: C. Y. Chang, K. W. Bell, P. Taras, Michael Kobel, R. W. Springer, N. K. Watson, Julie Kirk, Reda Tafirout, Klaus Kurt Desch, D. Rigby, R. J. Hemingway, B. W. Kennedy, P. Jovanovic, Austin Ball, Peter Krieger, Manuella Vincter, Alessandro Montanari, Robert McPherson, E. Tsur, James Pinfold, U. Jost, R. Mir, F. G. Oakham, B. Schmitt, Mathieu Doucet, R. D. Heuer, Ekg Sarkisyan, M. Verzocchi, J. Pálinkás, C. Hartmann, D. E. Plane, W. Mohr, D. G. Fong, C. Lewis, E. L. Barberio, M. Boutemeur, F. S. Merritt, A. Posthaus, J. C. Hill, J. Gascon, Stephen Hillier, G. M. Dallavalle, A. S. Turcot, F. Fiedler, C. Dallapiccola, Fabrizio Fabbri, J. Grunhaus, Kiyotomo Kawagoe, Misao Sasaki, W. J. McDonald, B. C. Shen, Dave Charlton, S. M. Gascon-Shotkin, Otmar Biebel, P. W. Jeffreys, W. Matthews, A. Biguzzi, N. Altekamp, R. J. Barlow, D. J. Miller, T. J. Smith, K. Stephens, G. W. Wilson, M. Hauschild, R. Van Kooten, M. A. Thomson, D. Glenzinskj, Claire Shepherd-Themistocleous, Siegfried Bethke, A. K. Honma, B. Nijjhar, W. G. Scott, I. Nakamura, S. A. Wotton, S. Braibant, A. D. Schaile, Gabriella Pasztor, E. K. U. Gross, R. Bürgin, H. Mes, C. Markus, V. Gibson, M. Sproston, J. W. Gary, D. S. Koetke, J. A. McKenna, A. Rooke, G. T. Jones, T. R. Junk, I. P. Duerdoth, Sachio Komamiya, Theodoros Geralis, E. Ros, A. T. Watson, Matthew Evans, P. Fath, J. Letts, Dezso Horvath, M. J. Losty, E. H. Vokurka, N. J. Oldershaw, Marcello Mannelli, F. Wäckerle, R. Howard, J. S. White, J. G. Layter, I. Trigger, D. R. Ward, T. Kress, G. A. Snow, S. Yamashita, P. Igo-Kemenes, K. Ishii, C. P. Ward, Norbert Wermes, Sherry Towers, T. Kawamoto, Silvia Arcelli, W. R. Gibson, B. T. Bouwens, A. Joly, A. M. Rossi, T. Tsukamoto, M. Kolrep, Jean-Arcady Meyer, Gideon Bella, H. J. Burckhart, Jacqueline Batley, P. Berlich, S. Orito, M. Rosvick, R. M. Brown, Lorne Levinson, R. Bartoldus, J. J. Ward, P. Vikas, D. Lanske, R. Lahmann, R. E. Hughes-Jones, S. B. Anderson, P. Szymanski, S. W. O'Neale, S. Söldner-Rembold, A. Skillman, G. Azuelos, M. Hapke, P. Pfeifenschneider, K. Nagai, D. C. Imrie, T. Omori, N. I. Geddes, T. Behnke, Michael Hildreth, D. E. Hutchcroft, D. R. Rust, P. Scharff-Hansen, H. O. Ogren, Christoph Geich-Gimbel, D. M. Strom, N. L. Rodning, O. Schaile, C. R. Jones, D. L. Rees, G. P. Siroli, B. Poli, M. J. Oreglia, T. P. Kokott, E. do Couto e Silva, A. M. Lee, R. Rylko, M. F. Turner-Watson, M. Morii, Stan Bentvelsen, F. Scharf, E. von Törne, J. Patt, German Martinez, A. M. Smith, M. Gruwé, C. M. Hawkes, Sven Menke, H. M. Fischer, Peter R Hobson, M. Fierro, J. E.G. Edwards, K. Sachs, Paul Kyberd, F. K. Loebinger, P. Routenburg, D. Chrisman, Andris Skuja, J. E. Conboy, Shlomo Dado, J. Steuerer, E. A. Mckigney, J. R. Carter, A. Fürtjes, Hans-Christian Schultz-Coulon, G. N. Patrick, S. Petzold, Matthias Schröder, U. Ruppel, M. R. Ingram, Randall Sobie, Michael Schulz, G. D. Lafferty, G. D. Long, Tetsuro Mashimo, Volker Blobel, Joleen Pater, S. Robertson, S. R. Lautenschlager, H. A. Neal, Gregor Herten, W. P. Lai, M. Thiergen, G. G. Hanson, R. Giacomelli, Richard Nisius, KJ Anderson, T. Hilse, S. A. Robins, W. Gorn, B. Wilkens, O. Runolfsson, J. Lauber, Paolo Giacomelli, P. S. Wells, Marco Cuffiani, M. Hansroul, Giora Mikenberg, John Allison, G. Giacomelli, J. M. Roney, Guenter Duckeck, Terry Richard Wyatt, C. Beeston, B. Stockhausen, Claudio Grandi, C. Burgard, J. E. Bloomer, D. M. Gingrich, J. E. Pilcher, R. G. Kellogg, M. Steiert, Gunter Wolf, Stephen Lloyd, R. J. Homer, Csaba Hajdu, P. Schenk, K. Ackerstaff, Stefano Marcellini, Stefan Schmitt, M. S. Dixit, Frans Meijers, P. G. Estabrooks, R. K. Keeler, Achim Stahl, P. E.L. Clarke, M. K. Jones, P. M. Watkins, J. P. Martin, O. C. Cooke, F. Strumia, S. D. Talbot, U. Müller, S. De Jong, A. J. Martin, P. Mättig, P. Poffenberger, Shoji Asai, J. von Krogh, H. Przysiezniak, P. Schütz, J. Bechtluft, I. J. Bloodworth, K. Ametewee, A. N. Bell, R. J. Hawkings, Gideon Alexander, Paolo Capiluppi, A. I. McNab, M. Schumacher, H. Jeremie, P. Gagnon, Yoram Rozen, E. Lefebvre, L. A. del Pozo, M. Foucher, Ehud Duchovni, J. Goldberg, F. Odorici, C. K. Hargrove, C. Sbarra, Tara Shears, A. Sittler, M. Jimack, D. Karlen, P. A. Hart, B. Nellen, A. Michelini, M. J. Pearce, H. M. Bosch, Satoshi Tanaka, T. Kobayashi, G. Yekutieli, D. Axen, A. Jawahery, A. A. Carter, Daniel Lellouch, H. G. Evans, Peter Sherwood, Ron Folman, Roger Jones, Alexander Wagner, Takehiko Mori, M. J. Goodrick, I. Cohen, J. Ludwig, K. Runge, V. Zacek, P. Bock, B. J. King, P. Utzat, Stefan Kluth, Shlomit Tarem, T. J. McMahon, R. K. Carnegie, M. Herndon, M. Bobinski, J. A. Wilson, and D. Lazic
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Missing energy, Muon, Luminosity (scattering theory), Electron–positron annihilation, High Energy Physics::Phenomenology, Fermion, Standard Model, Nuclear physics, Higgs boson, High Energy Physics::Experiment, Lepton
Abstract: This letter describes a search for the Standard Model Higgs boson using data from e + e − collisions collected at a centre-of-mass energy of 161 GeV by the OPAL detector at LEP. The ata correspond to an integrated luminosity of 10.0 pb −1 . The search is sensitive to the main final states from the process where the Higgs boson is produced in association with a fermion anti-fermion pair, namely four jets, two jets with missing energy, and two jets produced together with a pair of electrons, muons or tau leptons. Two candidate events are observed, in agreement with Standard Model background expectations. In combination with previous OPAL searches at centre-of-mass energies close to the Z 0 resonance, we derive a lower limit of 65.0 GeV for the mass of the Standard Model Higgs boson, at the 95% confidence level.
Published: 1997

25. Search for neutral Higgs bosons in ${\rm Z}^0$ decays using the OPAL detector at LEP

Author: Gregor Herten, B. Wilkens, Stefan Kluth, J. E. Pilcher, Shlomit Tarem, O. C. Cooke, K. Sachs, R. W. Springer, G. G. Hanson, G. W. Wilson, M. Hauschild, Shlomo Dado, S. A. Wotton, C. Markus, S. Yamashita, G. T. Jones, E. H. Vokurka, R. Bartoldus, M. Starks, S. L. Chu, Stefan Schmitt, G. Giacomelli, H. O. Ogren, R. Howard, P. Igo-Kemenes, J. S. White, Christoph Geich-Gimbel, P. Schenk, J. von Krogh, Georges Azuelos, E. Tsur, Giora Mikenberg, S. R. Lautenschlager, H. A. Neal, K. Ishii, H. Jeremie, M. S. Dixit, Frans Meijers, P. G. Estabrooks, R. K. Keeler, S. W. O'Neale, R. J. Hawkings, K. J. Anderson, F. X. Gentit, J. E. Conboy, A. Fürtjes, P. Mättig, Shoji Asai, A. Joly, M. Verzocchi, K. W. Bell, Otmar Biebel, H. Mes, T. Hilse, R. E. Hughes-Jones, S. B. Anderson, P. Szymanski, P. M. Watkins, I. P. Duerdoth, D. M. Strom, L. A. del Pozo, C. Y. Chang, O. Runolfsson, J. Pálinkás, J. C. Hill, P. E.L. Clarke, M. K. Jones, P. Fath, S. Braibant, A. D. Schaile, Gabriella Pasztor, T. Behnke, M. Boutemeur, F. S. Merritt, C. Sbarra, R. Rylko, Silvia Arcelli, A. I. McNab, P. Taras, J. Goldberg, Stan Bentvelsen, B. Nellen, J. P. Martin, Michael Kobel, C. Beeston, Misao Sasaki, W. J. McDonald, B. C. Shen, S. De Jong, John Allison, J. Letts, Paolo Giacomelli, G. Yekutieli, M. Gruwé, E. A. Mckigney, C. M. Hawkes, M. Hansroul, J. Bechtluft, Yoram Rozen, Claudio Grandi, Norbert Wermes, Sherry Towers, T. Kawamoto, O. Schaile, G. A. Snow, C. P. Ward, W. P. Lai, Siegfried Bethke, A. K. Honma, B. Nijjhar, W. G. Scott, I. Nakamura, J. A. McKenna, S. Söldner-Rembold, A. A. Carter, Ron Folman, Richard Nisius, J. M. Roney, Roger Jones, A. S. Turcot, H. G. Evans, C. Burgard, Julie Kirk, M. Foucher, H. Przysiezniak, E. do Couto e Silva, A. N. Bell, P. S. Wells, R. G. Kellogg, M. Steiert, S. Orito, R. J. Homer, B. J. King, Marco Cuffiani, P. Utzat, Terry Richard Wyatt, M. Rosvick, M. F. Turner-Watson, J. E. Bloomer, Csaba Hajdu, Stefano Marcellini, D. Karlen, M. J. Goodrick, I. Cohen, M. Hapke, T. J. McMahon, M. Kolrep, J. Lauber, Achim Stahl, A. Rooke, M. Morii, J. G. Layter, Peter R Hobson, Sven Menke, D. E. Hutchcroft, M. Schumacher, E. Lefebvre, P. Poffenberger, D. Glenzinski, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, R. K. Carnegie, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, G. D. Lafferty, M. Fierro, C. Charlesworth, J. E.G. Edwards, A. Malik, Ekg Sarkisyan, M. J. Oreglia, B. Stockhausen, Paul Kyberd, F. K. Loebinger, P. Routenburg, J. Steuerer, Daniel Lellouch, Sachio Komamiya, Theodoros Geralis, M. Bobinski, J. A. Wilson, P. W. Jeffreys, Takehiko Mori, P. Schütz, F. Strumia, S. D. Talbot, F. Odorici, Joleen Pater, E. Ros, A. T. Watson, Guenter Duckeck, J. R. Carter, G. N. Patrick, R. Giacomelli, D. Lazic, P. Pfeifenschneider, P. Scharff-Hansen, V. Zacek, J. Patt, J. J. Ward, P. Vikas, T. P. Kokott, D. Lanske, C. Dallapiccola, P. Gagnon, A. M. Smith, G. Vasseur, N. Altekamp, A. Sittler, R. J. Barlow, D. J. Miller, H. M. Bosch, James Pinfold, D. G. Fong, C. Lewis, J. Gascon, D. Rigby, R. J. Hemingway, S. M. Gascon-Shotkin, D. Axen, A. Jawahery, J. W. Gary, D. S. Koetke, B. W. Kennedy, Peter Sherwood, P. Jovanovic, Marcello Mannelli, Alexander Wagner, Matthew Evans, Andris Skuja, A. M. Rossi, J. Ludwig, S. Petzold, K. Runge, G. D. Long, P. Bock, Austin Ball, T. Tsukamoto, Peter Krieger, H. M. Fischer, Tetsuro Mashimo, Alessandro Montanari, G. Wolf, S. A. Robins, U. Jost, R. Mir, Dave Charlton, W. Gorn, R. Bürgin, H. Lafoux, Gideon Bella, C. H. Shepherd-Themistocleous, H. J. Burckhart, N. I. Geddes, Michael Hildreth, Jacqueline Batley, N. L. Rodning, T. Omori, B. Poli, F. G. Oakham, B. Schmitt, E. L. Barberio, I. J. Bloodworm, C. R. Jones, R. Lahmann, D. C. Imrie, R. Kowalewski, G. P. Siroli, K. Ametewee, Kiyotomo Kawagoe, Gideon Alexander, Paolo Capiluppi, P. Weber, Ehud Duchovni, M. Jimack, A. Michelini, Satoshi Tanaka, T. Kobayashi, D. Chrisman, Volker Blobel, Stephen Lloyd, T. J. Smith, K. Stephens, V. Gibson, T. R. Junk, D. R. Ward, T. Kress, Matthias Schröder, M. Vincier, U. Ruppel, M. R. Ingram, M. Thiergen, Frank Fiedler, U. Müller, A. J. Martin, C. K. Hargrove, Tara Shears, P. A. Hart, M. J. Pearce, Robert McPherson, Mathieu Doucet, R. D. Heuer, Fabrizio Fabbri, K. Nagai, D. R. Rust, A. M. Lee, M. Tecchio, E. von Törne, R. Van Kooten, F. Wäckerle, D. M. Gingrich, P. Berlich, Reda Tafirout, Klaus Kurt Desch, C. Hartmann, D. E. Plane, Stephen Hillier, G. M. Dallavalle, W. R. Gibson, B. T. Bouwens, R. M. Brown, Lorne Levinson, A. Skillman, N. K. Watson, W. Mohr, A. Posthaus, D. L. Rees, F. Scharf, German Martinez, W. Matthews, M. A. Thomson, E. K. U. Gross, A. Gaidot, and M. Sproston
Subjects: Nuclear physics, Physics, Particle physics, Physics and Astronomy (miscellaneous), Electron–positron annihilation, Detector, Higgs boson, Supersymmetry, Particle Physics - Experiment, Lower limit, Boson
Published: 1997

26. Photonic events with large missing energy in e+e− collisions at

Author: T. P. Kokott, A. Joly, Silvia Arcelli, C. Dallapiccola, C. Sbarra, P. Poffenberger, U. Ruppel, M. R. Ingram, N. Altekamp, E. A. Mckigney, R. J. Barlow, K. Nagai, W. P. Lai, Paolo Giacomelli, M. Hansroul, D. J. Miller, G. Yekutieli, J. Grunhaus, C. Burgard, P. Schütz, U. Jost, R. Mir, Gideon Bella, K. Sachs, J. M. Roney, S. R. Lautenschlager, R. J. Homer, Shlomo Dado, John Allison, R. G. Kellogg, M. Steiert, Csaba Hajdu, Stefano Marcellini, A. A. Carter, H. J. Burckhart, H. A. Neal, Ron Folman, Roger Jones, Jacqueline Batley, Tara Shears, T. Hilse, P. Schenk, M. Hapke, B. Stockhausen, Paul Kyberd, F. K. Loebinger, D. L. Rees, J. Steuerer, F. G. Oakham, B. Schmitt, Joleen Pater, Achim Stahl, O. Runolfsson, R. Giacomelli, G. Azuelos, F. Scharf, T. Omori, D. R. Rust, B. J. King, P. Utzat, P. A. Hart, E. L. Barberio, P. G. Estabrooks, Giora Mikenberg, R. K. Keeler, D. E. Hutchcroft, P. S. Wells, A. Rooke, German Martinez, H. M. Fischer, C. Beeston, Claudio Grandi, W. R. Gibson, J. G. Layter, S. Yamashita, T. J. McMahon, P. Igo-Kemenes, P. M. Watkins, M. J. Oreglia, A. M. Lee, A. S. Turcot, F. Fiedler, M. J. Pearce, G. W. Wilson, C. R. Jones, R. K. Carnegie, K. Ishii, H. Jeremie, W. Matthews, Claire Shepherd-Themistocleous, H. Mes, I. P. Duerdoth, M. Boutemeur, F. S. Merritt, S. W. O'Neale, K. J. Anderson, M. F. Turner-Watson, J. R. Carter, G. N. Patrick, E. von Törne, D. Rigby, R. J. Hemingway, B. W. Kennedy, P. Jovanovic, P. Pfeifenschneider, P. Fath, S. Braibant, A. D. Schaile, Gabriella Pasztor, M. Morii, M. Herndon, M. Bobinski, J. A. Wilson, M. Hauschild, S. A. Wotton, C. Markus, R. E. Hughes-Jones, Peter R Hobson, P. Routenburg, O. Schaile, T. J. Smith, K. Stephens, Terry Richard Wyatt, J. E. Bloomer, Austin Ball, Peter Krieger, Manuella Vincter, Alessandro Montanari, J. Patt, Dave Charlton, Otmar Biebel, J. Bechtluft, M. A. Thomson, S. A. Robins, R. Lahmann, A. Buguzzi, J. A. McKenna, D. C. Imrie, U. Müller, A. J. Martin, G. A. Snow, C. P. Ward, G. T. Jones, E. H. Vokurka, B. T. Bouwens, R. M. Brown, Lorne Levinson, E. do Couto e Silva, D. Lazic, P. E.L. Clarke, M. K. Jones, R. Bürgin, E. K. U. Gross, M. Sproston, S. Söldner-Rembold, M. Fierro, J. E.G. Edwards, D. Chrisman, Sven Menke, J. P. Martin, T. Behnke, V. Gibson, O. C. Cooke, Ekg Sarkisyan, P. W. Jeffreys, N. J. Oldershaw, R. Bartoldus, M. Kolrep, T. R. Junk, S. De Jong, I. Trigger, H. O. Ogren, A. Skillman, Volker Blobel, J. Letts, Christoph Geich-Gimbel, Norbert Wermes, Sherry Towers, M. Gruwé, C. M. Hawkes, D. R. Ward, T. Kress, J. von Krogh, M. Schumacher, T. Kawamoto, C. Hartmann, G. P. Siroli, Hans-Christian Schultz-Coulon, Robert McPherson, D. E. Plane, C. K. Hargrove, Randall Sobie, Michael Schulz, G. D. Lafferty, E. Lefebvre, H. Przysiezniak, N. K. Watson, R. J. Hawkings, S. Orito, M. Rosvick, Mathieu Doucet, Stephen Hillier, Matthias Schröder, L. A. del Pozo, R. D. Heuer, Richard Nisius, Fabrizio Fabbri, G. M. Dallavalle, Stephen Lloyd, F. Odorici, A. N. Bell, J. J. Ward, P. Vikas, M. Thiergen, Marco Cuffiani, J. E. Conboy, A. Fürtjes, N. I. Geddes, Michael Hildreth, D. Lanske, Guenter Duckeck, R. Van Kooten, W. Mohr, D. M. Gingrich, Ehud Duchovni, D. M. Strom, N. L. Rodning, A. Posthaus, S. B. Anderson, Kiyotomo Kawagoe, P. Szymanski, B. Poli, M. Jimack, Stan Bentvelsen, F. Wäckerle, S. Robertson, Gregor Herten, R. Rylko, G. G. Hanson, A. Michelini, B. Wilkens, Reda Tafirout, Klaus Kurt Desch, J. E. Pilcher, Satoshi Tanaka, T. Kobayashi, S. M. Gascon-Shotkin, G. Giacomelli, P. Berlich, Matthew Evans, R. Howard, J. S. White, A. M. Rossi, T. Tsukamoto, M. S. Dixit, Frans Meijers, Andris Skuja, S. Petzold, K. Ametewee, Gideon Alexander, G. D. Long, Paolo Capiluppi, Tetsuro Mashimo, W. Gorn, P. Scharff-Hansen, A. M. Smith, James Pinfold, D. G. Fong, C. Lewis, J. Gascon, J. W. Gary, D. S. Koetke, Marcello Mannelli, R. W. Springer, C. Y. Chang, P. Taras, Michael Kobel, Julie Kirk, E. Tsur, M. Verzocchi, K. W. Bell, J. Pálinkás, J. C. Hill, Misao Sasaki, W. J. McDonald, B. C. Shen, Siegfried Bethke, A. K. Honma, B. Nijjhar, W. G. Scott, I. Nakamura, D. Axen, A. Jawahery, Peter Sherwood, Alexander Wagner, J. Ludwig, K. Runge, P. Bock, J. Lauber, F. Strumia, S. D. Talbot, P. Gagnon, A. Sittler, D. Glenzinski, H. M. Bosch, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, Gunter Wolf, K. Ackerstaff, Stefan Kluth, Shlomit Tarem, A. I. McNab, J. Goldberg, B. Nellen, I. J. Bloodworth, H. G. Evans, M. J. Goodrick, I. Cohen, Yoram Rozen, M. Foucher, D. Karlen, Stefan Schmitt, P. Mättig, Shoji Asai, Daniel Lellouch, Takehiko Mori, V. Zacek, Sachio Komamiya, Theodoros Geralis, E. Ros, and A. T. Watson
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Photon, Luminosity (scattering theory), Missing energy, Branching fraction, Electron–positron annihilation, High Energy Physics::Experiment, Topology (electrical circuits), Supersymmetry, Standard Model
Abstract: Photonic events with large missing energy have been observed with the OPAL detector at LEP using two search topologies. The first topology looks for events with significant missing energy and at least one photon in |cosθ| 0.2. The second topology looks for events with an acoplanar photon pair where both photons are in |cosθ| < 0.7 and have energy exceeding 1.75 GeV. In the data sample corresponding to an integrated luminosity of 10.0 pb−1, 11 events are selected for the first topology and a cross-section of 1.6 ± 0.5 pb is measured within the kinematic acceptance, consistent with that expected for the Standard Model process e+e− → ννγ(γ). No events are selected for the second topology giving a 95% CL cross-section upper limit of 0.41 pb within the kinematic acceptance. Upper limits on the cross-section times branching ratio for new particle production are also derived.
Published: 1997

27. Searches for supersymmetric particles and anomalous four-jet production at $\sqrt{s} = 130$ and 136 GeV at LEP

Author: R. Van Kooten, T. J. McMahon, P. S. Wells, Terry Richard Wyatt, J. E. Bloomer, F. Wäckerle, D. M. Gingrich, R. K. Carnegie, M. Schumacher, E. Lefebvre, Otmar Biebel, M. Bobinski, J. A. Wilson, C. Hartmann, D. E. Plane, P. Scharff-Hansen, F. Odorici, P. G. Estabrooks, P. Berlich, R. K. Keeler, D. Lazic, Stephen Hillier, G. M. Dallavalle, S. L. Chu, M. Fierro, J. E.G. Edwards, D. Axen, A. Jawahery, P. M. Watkins, S. R. Lautenschlager, H. A. Neal, J. Letts, A. M. Smith, C. Y. Chang, T. Hilse, R. W. Springer, Peter Sherwood, Norbert Wermes, O. Runolfsson, O. C. Cooke, G. Vasseur, Sherry Towers, T. Kawamoto, D. M. Strom, P. Taras, F. X. Gentit, H. Mes, I. P. Duerdoth, P. Fath, Alexander Wagner, Silvia Arcelli, J. Ludwig, K. Runge, Michael Kobel, P. Bock, C. Beeston, Claudio Grandi, Gunter Wolf, R. Rylko, S. Orito, M. Rosvick, A. Malik, Ekg Sarkisyan, P. W. Jeffreys, J. von Krogh, Andris Skuja, Georges Azuelos, Robert McPherson, S. Petzold, G. D. Long, E. Tsur, M. Hapke, Julie Kirk, M. F. Turner-Watson, R. J. Hawkings, Mathieu Doucet, W. R. Gibson, M. Verzocchi, K. W. Bell, E. A. Mckigney, D. E. Hutchcroft, L. A. del Pozo, R. D. Heuer, M. Morii, P. Gagnon, Tetsuro Mashimo, Peter R Hobson, W. P. Lai, Fabrizio Fabbri, P. Routenburg, J. J. Ward, P. Vikas, C. Dallapiccola, J. Pálinkás, Sachio Komamiya, D. Lanske, J. C. Hill, M. J. Oreglia, Misao Sasaki, S. Yamashita, R. Howard, J. S. White, K. Sachs, Shlomo Dado, B. T. Bouwens, A. Sittler, Theodoros Geralis, E. Ros, A. T. Watson, J. M. Roney, C. Sbarra, W. Gorn, P. Igo-Kemenes, T. P. Kokott, A. Luig, P. Poffenberger, W. J. McDonald, T. Behnke, B. C. Shen, N. Altekamp, H. M. Bosch, R. M. Brown, Lorne Levinson, G. Yekutieli, Dave Charlton, Giora Mikenberg, A. A. Carter, Ron Folman, Roger Jones, K. Ishii, H. Lafoux, K. Nagai, P. Schütz, H. Jeremie, J. R. Carter, D. R. Rust, G. N. Patrick, Siegfried Bethke, A. K. Honma, B. Nijjhar, W. G. Scott, R. J. Barlow, J. Lauber, M. Gruwé, C. M. Hawkes, I. Nakamura, A. Skillman, D. J. Miller, S. Braibant, A. D. Schaile, Gabriella Pasztor, B. J. King, P. Utzat, R. E. Hughes-Jones, Daniel Lellouch, M. Starks, R. Bürgin, P. E.L. Clarke, M. K. Jones, James Pinfold, Stefan Kluth, Hans-Christian Schultz-Coulon, Shlomit Tarem, Randall Sobie, F. Strumia, Reda Tafirout, Klaus Kurt Desch, S. D. Talbot, G. A. Snow, C. P. Ward, Richard Nisius, D. Glenzinski, U. Jost, R. Mir, D. G. Fong, C. Lewis, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, S. Söldner-Rembold, Takehiko Mori, J. P. Martin, Michael Schulz, G. D. Lafferty, Gideon Bella, O. Schaile, J. Gascon, C. H. Shepherd-Themistocleous, H. J. Burckhart, Jacqueline Batley, E. do Couto e Silva, S. W. O'Neale, Marco Cuffiani, Gregor Herten, A. I. McNab, A. M. Lee, T. Omori, J. Goldberg, S. De Jong, K. J. Anderson, F. G. Oakham, B. Schmitt, M. Tecchio, E. von Törne, B. Nellen, V. Zacek, E. L. Barberio, C. R. Jones, Sven Menke, B. Wilkens, J. W. Gary, D. Rigby, R. J. Hemingway, H. G. Evans, D. S. Koetke, Marcello Mannelli, M. J. Goodrick, I. Cohen, B. W. Kennedy, P. Jovanovic, Austin Ball, Guenter Duckeck, Stefan Schmitt, Peter Krieger, Manuella Vincter, Alessandro Montanari, J. E. Pilcher, S. B. Anderson, P. Szymanski, G. W. Wilson, M. Hauschild, P. Mättig, Shoji Asai, S. A. Wotton, Stan Bentvelsen, I. J. Bloodworth, C. Markus, G. T. Jones, A. S. Turcot, E. H. Vokurka, Yoram Rozen, M. Foucher, H. Przysiezniak, D. Karlen, A. N. Bell, A. Rooke, J. G. Layter, C. Charlesworth, G. G. Hanson, G. Giacomelli, P. Schenk, R. Bartoldus, H. O. Ogren, Christoph Geich-Gimbel, M. S. Dixit, Frans Meijers, J. E. Conboy, A. Fürtjes, M. Boutemeur, F. S. Merritt, Tara Shears, P. A. Hart, M. J. Pearce, J. Bechtluft, J. A. McKenna, U. Müller, A. J. Martin, C. K. Hargrove, Matthias Schröder, M. Thiergen, John Allison, R. G. Kellogg, M. Steiert, Csaba Hajdu, Stefano Marcellini, T. J. Smith, B. Stockhausen, Paul Kyberd, F. K. Loebinger, J. Steuerer, K. Stephens, Joleen Pater, R. Giacomelli, V. Gibson, A. Joly, T. R. Junk, D. R. Ward, T. Kress, U. Ruppel, M. R. Ingram, R. Lahmann, D. C. Imrie, G. P. Siroli, Achim Stahl, Frank Fiedler, Kiyotomo Kawagoe, P. Pfeifenschneider, J. Patt, P. Weber, Paolo Giacomelli, M. Hansroul, C. Burgard, R. J. Homer, D. L. Rees, R. Kowalewski, N. I. Geddes, Michael Hildreth, F. Scharf, German Martinez, K. Ametewee, Gideon Alexander, N. L. Rodning, B. Poli, Paolo Capiluppi, N. K. Watson, S. M. Gascon-Shotkin, W. Mohr, D. Chrisman, A. Posthaus, Volker Blobel, W. Matthews, M. A. Thomson, E. K. U. Gross, A. Gaidot, M. Sproston, Matthew Evans, Stephen Lloyd, A. M. Rossi, T. Tsukamoto, H. M. Fischer, Ehud Duchovni, S. A. Robins, M. Jimack, A. Michelini, Satoshi Tanaka, and T. Kobayashi
Subjects: Physics, Quark, Particle physics, Physics and Astronomy (miscellaneous), High Energy Physics::Phenomenology, Scalar (mathematics), High Energy Physics::Experiment, Jet (particle physics), Particle Physics - Experiment, Lepton
Abstract: A search for supersymmetric particles (charged scalar leptons, charginos decaying semileptonically, scalar top quarks) and for the associated production of two massive particles decaying into quarks has been performed using a data sample of more than 5 pb-1 at centre-of-mass energies of √s = 130 and 136 GeV collected with the OPAL detector at LEP during November 1995. No evidence for production of any of these particles has been observed in the data. Limits are presented on the production of charged scalar leptons, semileptonically decaying charginos, scalar top quarks and on the associated production of two massive particles leading to four-jet final states. © Springer-Verlag 1997.
Published: 1997

28. [Management of labial incompetence and gummy smile using profiloplasty]

Author: M, Foucher, S, Quenin, and F, Disant
Subjects: Adult, Genioplasty, Face, Gingiva, Photography, Humans, Female, Middle Aged, Rhinoplasty, Smiling, Lip, Retrospective Studies
Abstract: Gummy smile and labial incompetence are frequent for consultation in plastic surgery. We wanted to show that rhinoplasty and genioplasty should correct these anomalies.Profiloplasty was performed on 20 patients. Aesthetic and functional items were evaluated.There is a correlation between aesthetic and functional results. Results seem to be better for patients having an important labial incompetence without gummy smile.Those results are based on anatomical and surgical considerations. Some non surgical procedures do exist to treat this problem. It should be a challenge to find the place for each procedure.
Published: 2013

29. Electroweak measurements in electron-positron collisions at W-boson-pair energies at LEP

Author: Schael, S. Barate, R. Brunelière, R. Buskulic, D. De Bonis, I. Decamp, D. Ghez, P. Goy, C. Jézéquel, S. Lees, J.-P. Lucotte, A. Martin, F. Merle, E. Minard, M.-N. Nief, J.-Y. Odier, P. Pietrzyk, B. Trocmé, B. Bravo, S. Casado, M.P. Chmeissani, M. Comas, P. Crespo, J.M. Fernandez, E. Fernandez-Bosman, M. Garrido, L. Grauges, E. Juste, A. Martinez, M. Merino, G. Miquel, R. Mir, L.M. Orteu, S. Pacheco, A. Park, I.C. Perlas, J. Riu, I. Ruiz, H. Sanchez, F. Colaleo, A. Creanza, D. De Filippis, N. de Palma, M. Iaselli, G. Maggi, G. Maggi, M. Nuzzo, S. Ranieri, A. Raso, G. Ruggieri, F. Selvaggi, G. Silvestris, L. Tempesta, P. Tricomi, A. Zito, G. Huang, X. Lin, J. Ouyang, Q. Wang, T. Xie, Y. Xu, R. Xue, S. Zhang, J. Zhang, L. Zhao, W. Abbaneo, D. Bazarko, A. Becker, U. Boix, G. Bird, F. Blucher, E. Bonvicini, B. Bright-Thomas, P. Barklow, T. Buchmüller, O. Cattaneo, M. Cerutti, F. Ciulli, V. Clerbaux, B. Drevermann, H. Forty, R.W. Frank, M. Greening, T.C. Hagelberg, R. Halley, A.W. Gianotti, F. Girone, M. Hansen, J.B. Harvey, J. Jacobsen, R. Hutchcroft, D.E. Janot, P. Jost, B. Knobloch, J. Kado, M. Lehraus, I. Lazeyras, P. Maley, P. Mato, P. May, J. Moutoussi, A. Pepe-Altarelli, M. Ranjard, F. Rolandi, L. Schlatter, D. Schmitt, B. Schneider, O. Tejessy, W. Teubert, F. Tomalin, I.R. Tournefier, E. Veenhof, R. Valassi, A. Wiedenmann, W. Wright, A.E. Ajaltouni, Z. Badaud, F. Chazelle, G. Deschamps, O. Dessagne, S. Falvard, A. Ferdi, C. Fayolle, D. Gay, P. Guicheney, C. Henrard, P. Jousset, J. Michel, B. Monteil, S. Montret, J.C. Pallin, D. Pascolo, J.M. Perret, P. Podlyski, F. Bertelsen, H. Fernley, T. Hansen, J.D. Hansen, J.R. Hansen, P.H. Kraan, A.C. Lindahl, A. Mollerud, R. Nilsson, B.S. Rensch, B. Waananen, A. Daskalakis, G. Kyriakis, A. Markou, C. Simopoulou, E. Siotis, I. Vayaki, A. Zachariadou, K. Blondel, A. Bonneaud, G. Brient, J.-C. Machefert, F. Rougé, A. Rumpf, M. Swynghedauw, M. Tanaka, R. Verderi, M. Videau, H. Focardi, E. Parrini, G. Corden, M. Georgiopoulos, C. Antonelli, A. Antonelli, M. Bencivenni, G. Bologna, G. Bossi, F. Campana, P. Capon, G. Chiarella, V. Felici, G. Laurelli, P. Mannocchi, G. Murtas, G.P. Passalacqua, L. Picchi, P. Colrain, P. ten Have, I. Hughes, I.S. Kennedy, J. Knowles, I.G. Lynch, J.G. Morton, W.T. Negus, P. O'Shea, V. Raine, C. Reeves, P. Scarr, J.M. Smith, K. Thompson, A.S. Turnbull, R.M. Wasserbaech, S. Cavanaugh, R. Dhamotharan, S. Geweniger, C. Hanke, P. Hansper, G. Hepp, V. Kluge, E.E. Putzer, A. Sommer, J. Stenzel, H. Tittel, K. Werner, W. Wunsch, M. Beuselinck, R. Binnie, D.M. Cameron, W. Davies, G. Dornan, P.J. Goodsir, S. Marinelli, N. Martin, E.B. Nash, J. Nowell, J. Rutherford, S.A. Sedgbeer, J.K. Thompson, J.C. White, R. Williams, M.D. Ghete, V.M. Girtler, P. Kneringer, E. Kuhn, D. Rudolph, G. Bouhova-Thacker, E. Bowdery, C.K. Buck, P.G. Clarke, D.P. Ellis, G. Finch, A.J. Foster, F. Hughes, G. Jones, R.W.L. Keemer, N.R. Pearson, M.R. Robertson, N.A. Sloan, T. Smizanska, M. Snow, S.W. Williams, M.I. van der Aa, O. Delaere, C. Leibenguth, G. Lemaitre, V. Bauerdick, L.A.T. Blumenschein, U. van Gemmeren, P. Giehl, I. Hölldorfer, F. Jakobs, K. Kasemann, M. Kayser, F. Kleinknecht, K. Müller, A.-S. Quast, G. Renk, B. Rohne, E. Sander, H.-G. Schmeling, S. Wachsmuth, H. Wanke, R. Zeitnitz, C. Ziegler, T. Aubert, J.J. Benchouk, C. Bonissent, A. Carr, J. Coyle, P. Curtil, C. Ealet, A. Etienne, F. Fouchez, D. Motsch, F. Payre, P. Rousseau, D. Tilquin, A. Talby, M. Thulasidas, M. Aleppo, M. Ragusa, F. Büscher, V. David, A. Dietl, H. Ganis, G. Hüttmann, K. Lütjens, G. Mannert, C. Männer, W. Moser, H.-G. Settles, R. Seywerd, H. Villegas, M. Wolf, G. Azzurri, P. Boucrot, J. Callot, O. Chen, S. Cordier, A. Davier, M. Duflot, L. Grivaz, J.-F. Heusse, P. Jacholkowska, A. Le Diberder, F. Lefrançois, J. Mutz, A.M. Schune, M.H. Serin, L. Veillet, J.-J. Videau, I. Zerwas, D. Bagliesi, G. Bettarini, S. Boccali, T. Bozzi, C. Calderini, G. Dell'Orso, R. Fantechi, R. Ferrante, I. Fidecaro, F. Foà, L. Giammanco, A. Giassi, A. Gregorio, A. Ligabue, F. Lusiani, A. Marrocchesi, P.S. Messineo, A. Palla, F. Rizzo, G. Sanguinetti, G. Sciabà, A. Sguazzoni, G. Spagnolo, P. Steinberger, J. Tenchini, R. Vannini, C. Venturi, A. Verdini, P.G. Awunor, O. Blair, G.A. Cowan, G. Garcia-Bellido, A. Green, M.G. Medcalf, T. Misiejuk, A. Strong, J.A. Teixeira-Dias, P. Botterill, D.R. Clifft, R.W. Edgecock, T.R. Edwards, M. Haywood, S.J. Norton, P.R. Ward, J.J. Bloch-Devaux, B. Boumediene, D. Colas, P. Emery, S. Fabbro, B. Kozanecki, W. Lançon, E. Lemaire, M.-C. Locci, E. Perez, P. Rander, J. Renardy, J.F. Roussarie, A. Schuller, J.P. Schwindling, J. Tuchming, B. Vallage, B. Black, S.N. Dann, J.H. Kim, H.Y. Konstantinidis, N. Litke, A.M. McNeil, M.A. Taylor, G. Booth, C.N. Cartwright, S. Combley, F. Hodgson, P.N. Lehto, M. Thompson, L.F. Affholderbach, K. Barberio, E. Böhrer, A. Brandt, S. Burkhardt, H. Feigl, E. Grupen, C. Hess, J. Lutters, G. Meinhard, H. Minguet-Rodriguez, J. Mirabito, L. Neugebauer, E. Ngac, A. Prange, G. Rivera, F. Saraiva, P. Schäfer, U. Sieler, U. Smolik, L. Stephan, F. Trier, H. Apollonio, M. Borean, C. Bosisio, L. Della Marina, R. Giannini, G. Gobbo, B. Musolino, G. Pitis, L. He, H. Kim, H. Putz, J. Rothberg, J. Armstrong, S.R. Bellantoni, L. Berkelman, K. Cinabro, D. Conway, J.S. Cranmer, K. Elmer, P. Feng, Z. Ferguson, D.P.S. Gao, Y. González, S. Grahl, J. Harton, J.L. Hayes, O.J. Hu, H. Jin, S. Johnson, R.P. Kile, J. McNamara, P.A. Nielsen, J. Orejudos, W. Pan, Y.B. Saadi, Y. Scott, I.J. Sharma, V. Walsh, A.M. Walsh, J. Wear, J. von Wimmersperg-Toeller, J.H. Wu, J. Wu, S.L. Wu, X. Yamartino, J.M. Zobernig, G. Dissertori, G. Abdallah, J. Abreu, P. Adam, W. Adzic, P. Albrecht, T. Alemany-Fernandez, R. Allmendinger, T. Allport, P.P. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.-D. Arnoud, Y. Ask, S. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barbier, R. Bardin, D. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Belous, K. Ben-Haim, E. Benekos, N. Benvenuti, A. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bloch, D. Blom, M. Bluj, M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Botner, O. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bracko, M. Brenner, R. Brodet, E. Bruckman, P. Brunet, J.M. Bugge, L. Buschbeck, B. Buschmann, P. Calvi, M. Camporesi, T. Canale, V. Carena, F. Castro, N. Cavallo, F. Chapkin, M. Charpentier, P. Checchia, P. Chierici, R. Chliapnikov, P. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cosme, G. Cossutti, F. Costa, M.J. Crawley, B. Crennell, D. Cuevas, J. D'Hondt, J. Dalmau, J. da Silva, T. Da Silva, W. Della Ricca, G. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Maria, N. De Min, A. de Paula, L. Di Ciaccio, L. Di Simone, A. Doroba, K. Drees, J. Dris, M. Duperrin, A. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferro, F. Flagmeyer, U. Foeth, H. Fokitis, E. Fulda-Quenzer, F. Fuster, J. Gandelman, M. Garcia, C. Gavillet, P. Gazis, E. Gele, D. Gokieli, R. Golob, B. Gomez-Ceballos, G. Gonçalves, P. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hallgren, A. Hamacher, K. Hamilton, K. Haug, S. Hauler, F. Hedberg, V. Hennecke, M. Herr, H. Hoffman, J. Holmgren, S.-O. Holt, P.J. Houlden, M.A. Hultqvist, K. Jackson, J.N. Jarlskog, G. Jarry, P. Jeans, D. Johansson, E.K. Johansson, P.D. Jonsson, P. Joram, C. Jungermann, L. Kapusta, F. Katsanevas, S. Katsoufis, E. Kernel, G. Kersevan, B.P. Kerzel, U. Kiiskinen, A. King, B.T. Kjaer, N.J. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krumstein, Z. Kucharczyk, M. Lamsa, J. Leder, G. Ledroit, F. Leinonen, L. Leitner, R. Lemonne, J. Lepeltier, V. Lesiak, T. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lopes, J.H. Lopez, J.M. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Malek, A. Maltezos, S. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Mazzucato, F. Mazzucato, M. Mc Nulty, R. Meroni, C. Meyer, W.T. Migliore, E. Mitaroff, W. Mjoernmark, U. Moa, T. Moch, M. Moenig, K. Monge, R. Montenegro, J. Moraes, D. Morettini, P. Mueller, U. Muenich, K. Mulders, M. Mundim, L. Murray, W. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F. Nawrocki, K. Nemecek, S. Nicolaidou, R. Nikolaenko, V. Nikolenko, M. Oblakowska-Mucha, A. Obraztsov, V. Olshevski, A. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Palacios, J.P. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Perepelitsa, V. Perrotta, A. Petrolini, A. Piedra, J. Pieri, L. Pierre, F. Pimenta, M. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Pukhaeva, N. Pullia, A. Radojicic, D. Rames, J. Ramler, L. Read, A. Rebecchi, P. Rehn, J. Reid, D. Reinhardt, R. Renton, P. Richard, F. Ridky, J. Ripp-Baudot, I. Rivero, M. Rodriguez, D. Romero, A. Ronchese, P. Rosenberg, E. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ryabtchikov, D. Sadovsky, A. Salmi, L. Salt, J. Sander, C. Savoy-Navarro, A. Schwickerath, U. Segar, A. Sekulin, R. Siebel, M. Simard, L. Sisakian, A. Smadja, G. Smirnova, O. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Stanitzki, M. Stocchi, A. Strauss, J. Stugu, B. Szczekowski, M. Szeptycka, M. Szumlak, T. Tabarelli, T. Taffard, A.C. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tkatchev, L. Tobin, M. Todorovova, S. Tomé, B. Tonazzo, A. Tortosa, P. Travnicek, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Uvarov, V. Valenti, G. Van Dam, P. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Veloso, F. Venus, W. Verbeure, F. Verdier, P. Verzi, V. Vilanova, D. Vitale, L. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J. Wilkinson, G. Winter, M. Witek, M. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zhuravlov, V. Zimin, N.I. Zintchenko, A. Zupan, M. Achard, P. Adriani, O. Aguilar-Benitez, M. Alcaraz, J. Alemanni, G. Allaby, J. Aloisio, A. Alviggi, M.G. Anderhub, H. Andreev, V.P. Anselmo, F. Arefiev, A. Azemoon, T. Aziz, T. Bagnaia, P. Bajo, A. Baksay, G. Baksay, L. Baldew, S.V. Banerjee, S. Barczyk, A. Barillère, R. Bartalini, P. Basile, M. Batalova, N. Battiston, R. Bay, A. Behner, F. Bellucci, L. Berbeco, R. Berdugo, J. Berges, P. Bertucci, B. Betev, B.L. Biasini, M. Biglietti, M. Biland, A. Blaising, J.J. Blyth, S.C. Bobbink, G.J. Böhm, A. Boldizsar, L. Borgia, B. Bottai, S. Bourilkov, D. Bourquin, M. Braccini, S. Branson, J.G. Brochu, F. Burger, J.D. Burger, W.J. Cai, X.D. Capell, M. Cara Romeo, G. Carlino, G. Cartacci, A. Casaus, J. Cavallari, F. Cavallo, N. Cecchi, C. Cerrada, M. Chamizo, M. Chang, Y.H. Chemarin, M. Chen, A. Chen, G. Chen, G.M. Chen, H.F. Chen, H.S. Chiefari, G. Cifarelli, L. Cindolo, F. Clare, I. Clare, R. Coignet, G. Colino, N. Costantini, S. de la Cruz, B. Cucciarelli, S. de Asmundis, R. Déglon, P. Debreczeni, J. Degré, A. Dehmelt, K. Deiters, K. della Volpe, D. Delmeire, E. Denes, P. DeNotaristefani, F. De Salvo, A. Diemoz, M. Dierckxsens, M. Dionisi, C. Dittmar, M. Doria, A. Dova, M.T. Duchesneau, D. Duda, M. Echenard, B. Eline, A. El Hage, A. El Mamouni, H. Engler, A. Eppling, F.J. Extermann, P. Falagan, M.A. Falciano, S. Favara, A. Fay, J. Fedin, O. Felcini, M. Ferguson, T. Fesefeldt, H. Fiandrini, E. Field, J.H. Filthaut, F. Fisher, P.H. Fisher, W. Forconi, G. Freudenreich, K. Furetta, C. Galaktionov, Y. Ganguli, S.N. Garcia-Abia, P. Gataullin, M. Gentile, S. Giagu, S. Gong, Z.F. Grenier, G. Grimm, O. Gruenewald, M.W. Gupta, V.K. Gurtu, A. Gutay, L.J. Haas, D. Hatzifotiadou, D. Hebbeker, T. Hervé, A. Hirschfelder, J. Hofer, H. Hohlmann, M. Holzner, G. Hou, S.R. Jin, B.N. Jindal, P. Jones, L.W. de Jong, P. Josa-Mutuberría, I. Kaur, M. Kienzle-Focacci, M.N. Kim, J.K. Kirkby, J. Kittel, W. Klimentov, A. König, A.C. Kopal, M. Koutsenko, V. Kräber, M. Kraemer, R.W. Krüger, A. Kunin, A. de Guevara, P.L. Laktineh, I. Landi, G. Lebeau, M. Lebedev, A. Lebrun, P. Lecomte, P. Lecoq, P. Le Coultre, P. Le Goff, J.M. Leiste, R. Levtchenko, M. Levtchenko, P. Li, C. Likhoded, S. Lin, C.H. Lin, W.T. Linde, F.L. Lista, L. Liu, Z.A. Lohmann, W. Longo, E. Lu, Y.S. Luci, C. Luminari, L. Lustermann, W. Ma, W.G. Malgeri, L. Malinin, A. Maña, C. Mans, J. Martin, J.P. Marzano, F. Mazumdar, K. McNeil, R.R. Mele, S. Merola, L. Meschini, M. Metzger, W.J. Mihul, A. Milcent, H. Mirabelli, G. Mnich, J. Mohanty, G.B. Muanza, G.S. Muijs, A.J.M. Musy, M. Nagy, S. Natale, S. Napolitano, M. Nessi-Tedaldi, F. Newman, H. Nisati, A. Novak, T. Nowak, H. Ofierzynski, R. Organtini, G. Pal, I. Palomares, C. Paolucci, P. Paramatti, R. Passaleva, G. Patricelli, S. Paul, T. Pauluzzi, M. Paus, C. Pauss, F. Pedace, M. Pensotti, S. Perret-Gallix, D. Piccolo, D. Pierella, F. Pieri, M. Pioppi, M. Piroué, P.A. Pistolesi, E. Plyaskin, V. Pohl, M. Pojidaev, V. Pothier, J. Prokofiev, D. Rahal-Callot, G. Rahaman, M.A. Raics, P. Raja, N. Ramelli, R. Rancoita, P.G. Ranieri, R. Raspereza, A. Razis, P. Rembeczki, S. Ren, D. Rescigno, M. Reucroft, S. Riemann, S. Riles, K. Roe, B.P. Romero, L. Rosca, A. Rosemann, C. Rosenbleck, C. Rosier-Lees, S. Roth, S. Rubio, J.A. Ruggiero, G. Rykaczewski, H. Sakharov, A. Saremi, S. Sarkar, S. Salicio, J. Sanchez, E. Schäfer, C. Schegelsky, V. Schopper, H. Schotanus, D.J. Sciacca, C. Servoli, L. Shevchenko, S. Shivarov, N. Shoutko, V. Shumilov, E. Shvorob, A. Son, D. Souga, C. Spillantini, P. Steuer, M. Stickland, D.P. Stoyanov, B. Straessner, A. Sudhakar, K. Sultanov, G. Sun, L.Z. Sushkov, S. Suter, H. Swain, J.D. Szillasi, Z. Tang, X.W. Tarjan, P. Tauscher, L. Taylor, L. Tellili, B. Teyssier, D. Timmermans, C. Ting, S.C.C. Ting, S.M. Tonwar, S.C. Tóth, J. Tully, C. Tung, K.L. Ulbricht, J. Valente, E. Van de Walle, R.T. Vasquez, R. Vesztergombi, G. Vetlitsky, I. Viertel, G. Vivargent, M. Vlachos, S. Vodopianov, I. Vogel, H. Vogt, H. Vorobiev, I. Vorobyov, A.A. Wadhwa, M. Wang, Q. Wang, X.L. Wang, Z.M. Weber, M. Wynhoff, S. Xia, L. Xu, Z.Z. Yamamoto, J. Yang, B.Z. Yang, C.G. Yang, H.J. Yang, M. Yeh, S.C. Zalite, A. Zalite, Y. Zhang, Z.P. Zhao, J. Zhu, G.Y. Zhu, R.Y. Zhuang, H.L. Zichichi, A. Zimmermann, B. Zöller, M. Abbiendi, G. Ackerstaff, K. Ainsley, C. Åkesson, P.F. Alexander, G. Allison, J. Altekamp, N. Ametewee, K. Anagnostou, G. Anderson, K.J. Anderson, S. Arcelli, S. Asai, S. Ashby, S.F. Axen, D. Azuelos, G. Ball, A.H. Bailey, I. Barillari, T. Barlow, R.J. Bartoldus, R. Batley, R.J. Baumann, S. Bechtle, P. Bechtluft, J. Beeston, C. Behnke, T. Bell, K.W. Bell, P.J. Bella, G. Bellerive, A. Benelli, G. Bentvelsen, S. Berlich, P. Bethke, S. Biebel, O. Boeriu, O. Blobel, V. Bloodworth, I.J. Bloomer, J.E. Bobinski, M. Bock, P. Bonacorsi, D. Bosch, H.M. Boutemeur, M. Bouwens, B.T. Braibant, S. Brigliadori, L. Brown, R.M. Burckhart, H.J. Burgard, C. Bürgin, R. Cammin, J. Campana, S. Capiluppi, P. Carnegie, R.K. Carter, A.A. Carter, J.R. Chang, C.Y. Charlton, D.G. Chrisman, D. Ciocca, C. Clarke, P.E.L. Clay, E. Cohen, I. Conboy, J.E. Cooke, O.C. Couchman, J. Couyoumtzelis, C. Coxe, R.L. Csilling, A. Cuffiani, M. Dado, S. Dallapiccola, C. Dallavalle, M. Dallison, S. De Jong, S. De Roeck, A. Dervan, P. De Wolf, E.A. del Pozo, L.A. Desch, K. Dienes, B. Dixit, M.S. do Couto e Silva, E. Donkers, M. Doucet, M. Dubbert, J. Duchovni, E. Duckeck, G. Duerdoth, I.P. Edwards, J.E.G. Estabrooks, P.G. Etzion, E. Evans, H.G. Evans, M. Fabbri, F. Fanti, M. Fath, P. Feld, L. Ferrari, P. Fiedler, F. Fierro, M. Fischer, H.M. Fleck, I. Folman, R. Fong, D.G. Ford, M. Foucher, M. Frey, A. Fürtjes, A. Futyan, D.I. Gagnon, P. Gary, J.W. Gascon, J. Gascon-Shotkin, S.M. Gaycken, G. Geddes, N.I. Geich-Gimbel, C. Geralis, T. Giacomelli, G. Giacomelli, P. Giacomelli, R. Gibson, V. Gibson, W.R. Gingrich, D.M. Giunta, M. Glenzinski, D. Goldberg, J. Goodrick, M.J. Gorn, W. Graham, K. Grandi, C. Gross, E. Grunhaus, J. Gruwé, M. Günther, P.O. Gupta, A. Hajdu, C. Hamann, M. Hanson, G.G. Hansroul, M. Hapke, M. Harder, K. Harel, A. Hargrove, C.K. Harin-Dirac, M. Hart, P.A. Hartmann, C. Hauke, A. Hauschild, M. Hawkes, C.M. Hawkings, R. Hemingway, R.J. Hensel, C. Herndon, M. Herten, G. Heuer, R.D. Hildreth, M.D. Hill, J.C. Hillier, S.J. Hilse, T. Hobson, P.R. Hocker, A. Hoffman, K. Homer, R.J. Honma, A.K. Horváth, D. Hossain, K.R. Howard, R. Hughes-Jones, R.E. Hüntemeyer, P. Igo-Kemenes, P. Imrie, D.C. Ingram, M.R. Ishii, K. Jacob, F.R. Jawahery, A. Jeffreys, P.W. Jeremie, H. Jimack, M. Joly, A. Jones, C.R. Jones, G. Jones, M. Jost, U. Jovanovic, P. Junk, T.R. Kanaya, N. Kanzaki, J. Karapetian, G. Karlen, D. Kartvelishvili, V. Kawagoe, K. Kawamoto, T. Keeler, R.K. Kellogg, R.G. Kennedy, B.W. Kim, D.H. King, B.J. Kirk, J. Klein, K. Klier, A. Kluth, S. Kobayashi, T. Kobel, M. Koetke, D.S. Kokott, T.P. Kolrep, M. Komamiya, S. Kowalewski, R.V. Krämer, T. Krasznahorkay, A. Kress, T. Krieger, P. von Krogh, J. Kuhl, T. Kupper, M. Kyberd, P. Lafferty, G.D. Lahmann, R. Lai, W.P. Landsman, H. Lanske, D. Lauber, J. Lautenschlager, S.R. Lawson, I. Layter, J.G. Lazic, D. Lee, A.M. Lefebvre, E. Leins, A. Lellouch, D. Letts, J. Levinson, L. Lewis, C. Liebisch, R. Lillich, J. List, B. List, J. Littlewood, C. Lloyd, A.W. Lloyd, S.L. Loebinger, F.K. Long, G.D. Losty, M.J. Lu, J. Ludwig, A. Ludwig, J. Macchiolo, A. Macpherson, A. Mader, W. Mannelli, M. Marcellini, S. Marchant, T.E. Markus, C. Martin, A.J. Martinez, G. Mashimo, T. Matthews, W. Mättig, P. McDonald, W.J. McKenna, J. Mckigney, E.A. McMahon, T.J. McNab, A.I. McPherson, R.A. Mendez-Lorenzo, P. Meijers, F. Menges, W. Menke, S. Merritt, F.S. Mes, H. Meyer, N. Meyer, J. Michelini, A. Mihara, S. Mikenberg, G. Miller, D.J. Mir, R. Mohr, W. Montanari, A. Mori, T. Morii, M. Müller, U. Mutter, A. Nagai, K. Nakamura, I. Nanjo, H. Neal, H.A. Nellen, B. Nijjhar, B. Nisius, R. O'Neale, S.W. Oakham, F.G. Odorici, F. Ogren, H.O. Oh, A. Okpara, A. Oldershaw, N.J. Omori, T. Oreglia, M.J. Orito, S. Pahl, C. Pálinkás, J. Pásztor, G. Pater, J.R. Patrick, G.N. Patt, J. Pearce, M.J. Petzold, S. Pfeifenschneider, P. Pilcher, J.E. Pinfold, J. Plane, D.E. Poffenberger, P. Polok, J. Poli, B. Pooth, O. Posthaus, A. Przybycien, M. Przysiezniak, H. Quadt, A. Rabbertz, K. Rees, D.L. Rembser, C. Renkel, P. Rick, H. Rigby, D. Robertson, S. Robins, S.A. Rodning, N. Roney, J.M. Rooke, A. Ros, E. Rosati, S. Roscoe, K. Rossi, A.M. Rosvick, M. Routenburg, P. Rozen, Y. Runge, K. Runolfsson, O. Ruppel, U. Rust, D.R. Rylko, R. Sachs, K. Saeki, T. Sahr, O. Sarkisyan, E.K.G. Sasaki, M. Sbarra, C. Schaile, A.D. Schaile, O. Scharff-Hansen, P. Schenk, P. Schieck, J. Schmitt, S. Schörner-Sadenius, T. Schröder, M. Schultz-Coulon, H.C. Schulz, M. Schumacher, M. Schütz, P. Schwick, C. Scott, W.G. Seuster, R. Shears, T.G. Shen, B.C. Shepherd-Themistocleous, C.H. Sherwood, P. Siroli, G.P. Sittler, A. Skillman, A. Skuja, A. Smith, A.M. Smith, T.J. Snow, G.A. Sobie, R. Söldner-Rembold, S. Spagnolo, S. Spano, F. Springer, R.W. Sproston, M. Stahl, A. Steiert, M. Stephens, K. Steuerer, J. Stockhausen, B. Stoll, K. Strom, D. Ströhmer, R. Strumia, F. Stumpf, L. Surrow, B. Szymanski, P. Tafirout, R. Talbot, S.D. Tanaka, S. Taras, P. Tarem, S. Taylor, R.J. Tasevsky, M. Teuscher, R. Thiergen, M. Thomson, M.A. von Törne, E. Torrence, E. Towers, S. Toya, D. Trefzger, T. Trigger, I. Trócsányi, Z. Tsukamoto, T. Tsur, E. Turcot, A.S. Turner-Watson, M.F. Ueda, I. Ujvári, B. Utzat, P. Vachon, B. Van Kooten, R. Vannerem, P. Vértesi, R. Verzocchi, M. Vikas, P. Vincter, M. Vokurka, E.H. Vollmer, C.F. Voss, H. Vossebeld, J. Wäckerle, F. Wagner, A. Waller, D. Ward, C.P. Ward, D.R. Watkins, P.M. Watson, A.T. Watson, N.K. Wells, P.S. Wengler, T. Wermes, N. Wetterling, D. White, J.S. Wilkens, B. Wilson, G.W. Wilson, J.A. Wotton, S. Wyatt, T.R. Yamashita, S. Yekutieli, G. Zacek, V. Zer-Zion, D. Zivkovic, L.
Subjects: High Energy Physics::Experiment
Abstract: Electroweak measurements performed with data taken at the electron-positron collider LEP at CERN from 1995 to 2000 are reported. The combined data set considered in this report corresponds to a total luminosity of about 3fb-1 collected by the four LEP experiments ALEPH, DELPHI, L3 and OPAL, at centre-of-mass energies ranging from 130GeV to 209GeV. Combining the published results of the four LEP experiments, the measurements include total and differential cross-sections in photon-pair, fermion-pair and four-fermion production, the latter resulting from both double-resonant W W and Z Z production as well as singly resonant production. Total and differential cross-sections are measured precisely, providing a stringent test of the Standard Model at centre-of-mass energies never explored before in electron-positron collisions. Final-state interaction effects in four-fermion production, such as those arising from colour reconnection and Bose-Einstein correlations between the two W decay systems arising in W W production, are searched for and upper limits on the strength of possible effects are obtained. The data are used to determine fundamental properties of the W boson and the electroweak theory. Among others, the mass and width of the W boson, mW and ΓW, the branching fraction of W decays to hadrons, B (W → had), and the trilinear gauge-boson self-couplings g1 Z, κγ and λγ are determined to be: mW=80.376±0.033GeV ΓW=2.195±0.083GeV B(W→had)=67.41±0.27% g1 Z=0.9840+0.018 -0.020 κγ=0.982±0.042λγ=-0.022±0.019. © 2013 Elsevier B.V.
Published: 2013

30. Measurement of the mass of the W boson in e+e− collisions at =161

Author: J. Grunhaus, Otmar Biebel, S. Braibant, A. D. Schaile, K. Nagai, Ehud Duchovni, M. Jimack, Gabriella Pasztor, D. R. Rust, A. Rooke, A. Michelini, John Allison, Daniel Lellouch, J. Letts, O. C. Cooke, J. G. Layter, G. A. Snow, Takehiko Mori, T. Behnke, K. Ackerstaff, Norbert Wermes, Satoshi Tanaka, T. Kobayashi, A. M. Lee, Sherry Towers, T. Kawamoto, P. Schenk, J. von Krogh, C. P. Ward, R. Lahmann, C. Sbarra, D. C. Imrie, E. von Törne, G. Yekutieli, R. J. Hawkings, Sachio Komamiya, W. Matthews, A. A. Carter, Ron Folman, Roger Jones, R. G. Kellogg, B. J. King, P. Utzat, S. Orito, M. Steiert, S. Söldner-Rembold, V. Zacek, Theodoros Geralis, E. Ros, A. T. Watson, L. A. del Pozo, T. J. McMahon, M. Rosvick, M. A. Thomson, Csaba Hajdu, James Pinfold, M. Gruwé, D. G. Fong, C. Lewis, C. M. Hawkes, P. G. Estabrooks, R. K. Keeler, U. Ruppel, M. R. Ingram, Stefano Marcellini, M. Boutemeur, F. S. Merritt, W. J. McDonald, E. K. U. Gross, N. I. Geddes, Michael Hildreth, J. Gascon, M. Hapke, T. P. Kokott, H. Mes, Richard Nisius, J. Lauber, S. B. Anderson, N. L. Rodning, Gideon Bella, P. Szymanski, G. P. Siroli, P. M. Watkins, M. Sproston, R. Van Kooten, P. E.L. Clarke, D. E. Hutchcroft, Marco Cuffiani, R. K. Carnegie, I. J. Bloodworth, B. C. Shen, M. Herndon, I. P. Duerdoth, M. Bobinski, A. I. McNab, J. Goldberg, J. A. Wilson, H. J. Burckhart, M. K. Jones, B. Poli, J. P. Martin, Jacqueline Batley, M. J. Oreglia, D. Lazic, J. W. Gary, P. Fath, B. Nellen, F. Strumia, S. Yamashita, C. Y. Chang, B. Stockhausen, Paul Kyberd, F. K. Loebinger, S. De Jong, S. D. Talbot, H. M. Fischer, D. S. Koetke, Marcello Mannelli, K. Ametewee, Siegfried Bethke, N. K. Watson, F. Wäckerle, A. K. Honma, J. Steuerer, Paolo Giacomelli, M. Hansroul, K. Sachs, Yoram Rozen, Shlomo Dado, B. Nijjhar, W. G. Scott, J. R. Carter, G. N. Patrick, Silvia Arcelli, P. Taras, Michael Kobel, Gideon Alexander, H. Przysiezniak, T. Omori, Claire Shepherd-Themistocleous, Joleen Pater, P. Igo-Kemenes, J. Bechtluft, H. G. Evans, P. Berlich, Paolo Capiluppi, S. A. Robins, P. Scharff-Hansen, J. A. McKenna, I. Nakamura, M. F. Turner-Watson, Stan Bentvelsen, M. Foucher, R. Giacomelli, M. Morii, Peter R Hobson, K. Ishii, H. Jeremie, P. Routenburg, M. J. Goodrick, I. Cohen, E. A. Mckigney, W. Mohr, Robert McPherson, A. M. Smith, A. N. Bell, M. Schumacher, E. Lefebvre, Giora Mikenberg, A. Posthaus, D. Chrisman, W. P. Lai, Mathieu Doucet, R. D. Heuer, R. E. Hughes-Jones, S. M. Gascon-Shotkin, Volker Blobel, C. Burgard, R. J. Homer, Fabrizio Fabbri, M. Fierro, Andris Skuja, S. Petzold, C. R. Jones, J. E.G. Edwards, D. Glenzinski, Dezso Horvath, M. J. Losty, F. Odorici, G. G. Hanson, G. D. Long, J. M. Roney, Tetsuro Mashimo, D. Karlen, Hans-Christian Schultz-Coulon, Stephen Lloyd, Randall Sobie, Michael Schulz, G. D. Lafferty, S. R. Lautenschlager, Stefan Kluth, Shlomit Tarem, Jean-Arcady Meyer, P. Gagnon, Matthew Evans, H. A. Neal, A. M. Rossi, T. J. Smith, K. Stephens, R. Bartoldus, D. L. Rees, T. Tsukamoto, W. Gorn, A. Joly, G. Giacomelli, F. Scharf, German Martinez, T. Hilse, R. W. Springer, G. W. Wilson, O. Runolfsson, H. O. Ogren, Dave Charlton, P. Pfeifenschneider, V. Gibson, Christoph Geich-Gimbel, Guenter Duckeck, O. Schaile, Stefan Schmitt, T. R. Junk, A. Sittler, C. Beeston, M. Hauschild, R. Bürgin, J. Patt, Claudio Grandi, E. do Couto e Silva, Georges Azuelos, I. Trigger, Ekg Sarkisyan, P. W. Jeffreys, M. S. Dixit, E. Tsur, D. R. Ward, T. Kress, M. Verzocchi, Frans Meijers, K. W. Bell, P. Mättig, J. Pálinkás, Shoji Asai, S. A. Wotton, Kiyotomo Kawagoe, A. S. Turcot, J. J. Ward, F. Fiedler, P. Vikas, J. C. Hill, D. Lanske, Misao Sasaki, Achim Stahl, Sven Menke, H. M. Bosch, M. Kolrep, C. Markus, G. T. Jones, D. Axen, A. Jawahery, J. E. Conboy, A. Fürtjes, E. H. Vokurka, Peter Sherwood, Alexander Wagner, J. Ludwig, K. Runge, P. Bock, N. J. Oldershaw, P. S. Wells, S. Robertson, Gregor Herten, B. Wilkens, J. E. Pilcher, Terry Richard Wyatt, J. E. Bloomer, U. Müller, A. J. Martin, C. K. Hargrove, Tara Shears, P. A. Hart, R. Howard, M. J. Pearce, J. S. White, Reda Tafirout, Klaus Kurt Desch, Matthias Schröder, C. Hartmann, D. E. Plane, Stephen Hillier, M. Thiergen, G. M. Dallavalle, Julie Kirk, W. R. Gibson, D. M. Gingrich, B. T. Bouwens, S. W. O'Neale, K. J. Anderson, R. M. Brown, G. WoIf, Lorne Levinson, P. Poffenberger, A. Skillman, P. Schütz, D. M. Strom, R. Rylko, U. Jost, R. Mir, F. G. Oakham, B. Schmitt, E. L. Barberio, C. Dallapiccola, N. Altekamp, R. J. Barlow, D. J. Miller, D. Rigby, R. J. Hemingway, B. W. Kennedy, P. Jovanovic, Austin Ball, Peter Krieger, Manuella Vincter, and Alessandro Montanari
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Pair production, Luminosity (scattering theory), Electron–positron annihilation, Detector, Beam energy, Energy (signal processing), Standard Model
Abstract: This letter describes the first observation of W boson pair production at a centre-of-mass energy s =161 GeV in the OPAL detector at LEP. The analysis is sensitive to all expected W + W − decay channels. A total of 28 events have been selected for an integrated luminosity of 9.89±0.06 pb −1 . This is consistent with the Standard Model expectation, including signal and background contributions. The W pair production cross-section is measured to be σ WW = 3.62 −0.82 +0.93 ±0.16 pb. An analysis of the predicted M W dependence of the accepted cross-section, taking into account interference in the four-fermion production processes, yields M W = 80.40 −0.41−0.10 +0.44+0.09 ±0.10 GeV, where the first and second uncertainties are statistical and systematic, respectively, and the third arises form the beam energy uncertainty.
Published: 1996

31. Search for chargino and neutralino production in e+e− collisions at = 161

Author: A. Rooke, J. G. Layter, Sachio Komamiya, Theodoros Geralis, I. J. Bloodworth, K. Nagai, E. Ros, A. T. Watson, A. I. McNab, J. Goldberg, Silvia Arcelli, S. R. Lautenschlager, R. Lahmann, D. R. Rust, H. A. Neal, B. Nellen, Otmar Biebel, P. E.L. Clarke, M. K. Jones, J. P. Martin, W. Matthews, S. De Jong, Tara Shears, G. G. Hanson, G. Giacomelli, H. Mes, M. S. Dixit, Frans Meijers, Yoram Rozen, U. Jost, R. Mir, H. Przysiezniak, A. N. Bell, T. Hilse, M. Foucher, M. A. Thomson, T. P. Kokott, I. P. Duerdoth, A. M. Lee, D. M. Strom, P. A. Hart, E. A. Mckigney, H. G. Evans, O. Runolfsson, E. K. U. Gross, Claire Shepherd-Themistocleous, S. Braibant, P. Fath, D. Chrisman, M. J. Goodrick, I. Cohen, E. von Törne, M. Boutemeur, F. S. Merritt, W. P. Lai, R. Rylko, M. Sproston, Volker Blobel, A. D. Schaile, Gabriella Pasztor, D. Karlen, Reda Tafirout, Klaus Kurt Desch, M. J. Pearce, Dave Charlton, J. Letts, F. G. Oakham, C. Beeston, Claudio Grandi, G. P. Siroli, Daniel Lellouch, G. A. Snow, C. P. Ward, Stephen Lloyd, S. Yamashita, B. Schmitt, Stefan Kluth, Norbert Wermes, Sherry Towers, T. Kawamoto, S. W. O'Neale, E. L. Barberio, J. M. Roney, Takehiko Mori, D. C. Imrie, P. Igo-Kemenes, S. Söldner-Rembold, Shlomit Tarem, C. Dallapiccola, J. Bechtluft, K. J. Anderson, R. Bürgin, V. Zacek, P. Scharff-Hansen, N. K. Watson, Robert McPherson, C. Y. Chang, J. A. McKenna, Mathieu Doucet, S. Orito, M. Rosvick, T. Behnke, P. Taras, P. Schenk, K. Ishii, H. Jeremie, R. D. Heuer, Fabrizio Fabbri, U. Müller, Michael Kobel, R. E. Hughes-Jones, N. Altekamp, M. Hapke, Gunter Wolf, P. S. Wells, Terry Richard Wyatt, K. Ackerstaff, R. Van Kooten, A. J. Martin, P. G. Estabrooks, R. K. Keeler, M. Fierro, J. E.G. Edwards, C. Sbarra, R. J. Barlow, A. M. Smith, Stefan Schmitt, Ekg Sarkisyan, P. W. Jeffreys, M. F. Turner-Watson, D. J. Miller, R. Bartoldus, D. E. Hutchcroft, Julie Kirk, J. E. Bloomer, P. Gagnon, Kiyotomo Kawagoe, M. Morii, H. O. Ogren, Gideon Bella, N. J. Oldershaw, W. Mohr, F. Wäckerle, D. M. Gingrich, Christoph Geich-Gimbel, Peter R Hobson, M. Gruwé, G. Yekutieli, M. J. Oreglia, C. K. Hargrove, P. Mättig, J. J. Ward, P. Poffenberger, K. Ametewee, P. Vikas, A. Posthaus, O. Schaile, P. M. Watkins, Shoji Asai, Matthias Schröder, C. M. Hawkes, D. Lanske, Gideon Alexander, C. Hartmann, D. E. Plane, P. Berlich, H. J. Burckhart, A. Sittler, James Pinfold, Paolo Capiluppi, Stephen Hillier, D. Rigby, R. J. Hemingway, R. W. Springer, P. Schütz, M. Thiergen, P. Routenburg, D. G. Fong, C. Lewis, E. do Couto e Silva, A. A. Carter, Ron Folman, Roger Jones, Richard Nisius, J. Gascon, G. M. Dallavalle, J. R. Carter, M. Schumacher, G. N. Patrick, B. W. Kennedy, S. Robertson, Gregor Herten, P. Jovanovic, Jacqueline Batley, B. J. King, E. Lefebvre, P. Utzat, Ehud Duchovni, Marco Cuffiani, B. Wilkens, M. Jimack, D. L. Rees, J. E. Conboy, Austin Ball, A. Fürtjes, J. E. Pilcher, A. Michelini, Peter Krieger, O. C. Cooke, F. Odorici, J. W. Gary, F. Scharf, German Martinez, H. M. Bosch, R. Howard, J. S. White, J. Grunhaus, G. W. Wilson, D. S. Koetke, M. Hauschild, Manuella Vincter, Alessandro Montanari, S. A. Wotton, Satoshi Tanaka, T. Kobayashi, Georges Azuelos, Marcello Mannelli, C. Markus, J. von Krogh, W. R. Gibson, Andris Skuja, E. Tsur, G. T. Jones, Sven Menke, E. H. Vokurka, S. Petzold, G. D. Long, R. J. Hawkings, M. Verzocchi, K. W. Bell, Tetsuro Mashimo, B. T. Bouwens, L. A. del Pozo, J. Pálinkás, A. Joly, H. M. Fischer, T. J. McMahon, T. Omori, D. Axen, J. C. Hill, A. Jawahery, Misao Sasaki, W. J. McDonald, R. K. Carnegie, B. C. Shen, M. Herndon, M. Bobinski, S. A. Robins, W. Gorn, R. M. Brown, Lorne Levinson, J. A. Wilson, T. J. Smith, Siegfried Bethke, K. Stephens, A. K. Honma, B. Nijjhar, W. G. Scott, Peter Sherwood, C. R. Jones, I. Nakamura, D. Lazic, N. I. Geddes, Michael Hildreth, V. Gibson, Alexander Wagner, A. Skillman, N. L. Rodning, B. Poli, J. Ludwig, John Allison, T. R. Junk, K. Runge, P. Bock, I. Trigger, D. R. Ward, T. Kress, J. Lauber, S. M. Gascon-Shotkin, U. Ruppel, M. R. Ingram, D. Glenzinski, Dezso Horvath, Matthew Evans, A. M. Rossi, R. G. Kellogg, T. Tsukamoto, M. Steiert, M. J. Losty, Jean-Arcady Meyer, F. Strumia, S. D. Talbot, Csaba Hajdu, Stefano Marcellini, B. Stockhausen, Paul Kyberd, F. K. Loebinger, J. Steuerer, Joleen Pater, R. Giacomelli, Paolo Giacomelli, M. Hansroul, C. Burgard, R. J. Homer, P. Pfeifenschneider, J. Patt, Achim Stahl, K. Sachs, Shlomo Dado, Giora Mikenberg, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, G. D. Lafferty, Guenter Duckeck, A. S. Turcot, F. Fiedler, M. Kolrep, S. B. Anderson, P. Szymanski, and Stan Bentvelsen
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Astrophysics::High Energy Astrophysical Phenomena, Supergravity, High Energy Physics::Phenomenology, Scalar (mathematics), Supersymmetry, Lower limit, Nuclear physics, Chargino, Neutralino, High Energy Physics::Experiment, Nuclear Experiment, Minimal Supersymmetric Standard Model
Abstract: Charginos and neutralinos, predicted by supersymmetric theories, have been searched for in e+e− collisions with an intergrated luminosity of 10.0 pb−1 at a centre-of-mass energy of s = 161 GeV with the OPAL detector at LEP. Two candidate events are selected; consistent with the total background estimate of 0.7 ± 0.2 events. The 95% C.L. lower limit on the lightest chargino mass in the Minimal Supersymmetric Standard Model is 78.5 GeV if the universal scalar mass m0 is greater than 1 TeV, and 62.0 GeV for the smallest m0 compatible with slepton and sneutrino mass limits obtained at centre-of-mass energies near the Z peak. These limits were obtained under the conditions that the lightest chargino is heavier than the lightest neutralino by more than 10 GeV and tan β = 1.5. The new exclusion limits significantly improve on the results obtained at s = 130 and 136 GeV.
Published: 1996

32. Test of QCD analytic predictions for the multiplicity ratio between gluon and quark jets

Author: G. W. Wilson, James Pinfold, M. Hauschild, P. Poffenberger, D. G. Fong, C. Lewis, J. Gascon, S. A. Wotton, C. Markus, P. G. Estabrooks, Stefan Schmitt, P. Schütz, W. J. McDonald, B. C. Shen, D. Rigby, R. J. Hemingway, T. J. Smith, P. Gagnon, S. L. Chu, Siegfried Bethke, G. T. Jones, B. W. Kennedy, P. Jovanovic, Ekg Sarkisyan, P. M. Watkins, A. K. Honma, B. Nijjhar, W. G. Scott, Austin Ball, A. Malik, A. Gaidot, A. Sittler, Paolo Giacomelli, M. Hansroul, I. Nakamura, E. H. Vokurka, M. Hapke, P. Mättig, Shoji Asai, Kiyotomo Kawagoe, J. W. Gary, D. S. Koetke, P. Pfeifenschneider, C. Hartmann, D. E. Plane, J. Patt, Peter Krieger, Marcello Mannelli, C. Burgard, Manuella Vincter, D. M. Strom, Matthias Schröder, H. M. Bosch, D. E. Hutchcroft, I. J. Bloodworth, R. J. Homer, P. W. Jeffreys, Stephen Hillier, M. Boutemeur, F. S. Merritt, Alessandro Montanari, Dave Charlton, H. Mes, M. Thiergen, G. G. Hanson, C. Dallapiccola, S. Braibant, A. D. Schaile, D. Glenzinski, Dezso Horvath, J. Lauber, P. Scharff-Hansen, G. M. Dallavalle, M. J. Oreglia, M. J. Losty, Yoram Rozen, Gabriella Pasztor, P. Weber, I. P. Duerdoth, M. Foucher, Jean-Arcady Meyer, Achim Stahl, R. Bürgin, P. Fath, Silvia Arcelli, T. J. McMahon, T. Behnke, Alan Watson, F. Strumia, S. D. Talbot, R. Rylko, P. Schenk, A. M. Smith, Tara Shears, D. Karlen, J. Bechtluft, G. A. Snow, C. P. Ward, G. Giacomelli, Gideon Bella, C. H. Shepherd-Themistocleous, H. J. Burckhart, S. Söldner-Rembold, N. Altekamp, R. J. Barlow, Jacqueline Batley, G. Vasseur, Stefan Kluth, J. R. Carter, Eilam Gross, R. W. Springer, G. N. Patrick, R. K. Carnegie, M. Bobinski, S. Yamashita, J. A. Wilson, Frank Fiedler, S. W. O'Neale, K. J. Anderson, E. A. Mckigney, J. A. McKenna, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, G. D. Lafferty, P. Igo-Kemenes, P. A. Hart, Georges Azuelos, U. Ruppel, M. R. Ingram, M. J. Pearce, M. S. Dixit, E. Tsur, W. P. Lai, C. Y. Chang, M. Gruwé, C. M. Hawkes, Shlomit Tarem, Frans Meijers, B. Stockhausen, Paul Kyberd, F. K. Loebinger, S. M. Gascon-Shotkin, Andris Skuja, K. Ishii, H. Jeremie, Otmar Biebel, T. Omori, R. Bartoldus, Reda Tafirout, Klaus Kurt Desch, D. Lazic, Robert McPherson, P. Taras, M. Verzocchi, K. W. Bell, D. Axen, S. Petzold, A. Jawahery, J. J. Ward, U. Jost, R. Mir, Richard Nisius, Gregor Herten, G. D. Long, R. E. Hughes-Jones, P. Vikas, Tetsuro Mashimo, Richard Keeler, J. Steuerer, J. Pálinkás, J. M. Roney, Michael Kobel, Daniel Lellouch, O. C. Cooke, J. C. Hill, C. R. Jones, H. O. Ogren, K. Sachs, R. Kowalewski, Misao Sasaki, D. L. Rees, Shlomo Dado, Takehiko Mori, M. Schumacher, Mathieu Doucet, B. Wilkens, U. Müller, Joleen Pater, O. Schaile, E. Lefebvre, Peter Sherwood, Alexander Wagner, J. Ludwig, Christoph Geich-Gimbel, A. J. Martin, Julie Kirk, J. Letts, V. Zacek, K. Runge, P. Bock, Guenter Duckeck, W. Gorn, R. Giacomelli, D. Lanske, E. do Couto e Silva, Norbert Wermes, Sherry Towers, J. E. Conboy, F. Scharf, R. D. Heuer, Marco Cuffiani, F. Odorici, A. Rooke, J. G. Layter, T. Kawamoto, F. G. Oakham, J. von Krogh, Fabrizio Fabbri, K. Stephens, R. Howard, W. R. Gibson, J. S. White, Giora Mikenberg, K. Ametewee, German Martinez, D. J. Miller, S. Orito, M. Rosvick, B. T. Bouwens, R. J. Hawkings, B. Schmitt, E. L. Barberio, Sven Menke, A. Fürtjes, C. K. Hargrove, C. Charlesworth, Matthew Evans, Gideon Alexander, A. M. Rossi, R. Van Kooten, Paolo Capiluppi, L. A. del Pozo, Gunter Wolf, F. X. Gentit, V. Gibson, Lorne Levinson, S. B. Anderson, C. Sbarra, J. E. Pilcher, P. Szymanski, John Allison, N. K. Watson, T. R. Junk, T. Tsukamoto, A. Skillman, H. M. Fischer, G. Yekutieli, P. S. Wells, M. Fierro, D. R. Ward, H. Lafoux, T. Kress, J. E.G. Edwards, Terry Richard Wyatt, A. A. Carter, Ron Folman, Roger Jones, J. E. Bloomer, S. R. Lautenschlager, H. A. Neal, A. I. McNab, J. Goldberg, Stan Bentvelsen, F. Wäckerle, D. Chrisman, R. G. Kellogg, B. J. King, B. Nellen, T. Hilse, Volker Blobel, P. Utzat, O. Runolfsson, M. Steiert, D. M. Gingrich, H. G. Evans, W. Mohr, S. A. Robins, M. J. Goodrick, A. Posthaus, I. Cohen, Csaba Hajdu, C. Beeston, A. S. Turcot, Claudio Grandi, W. Matthews, P. E.L. Clarke, M. K. Jones, P. Berlich, Stefano Marcellini, K. Nagai, J. P. Martin, M. A. Thomson, D. R. Rust, Stephen Lloyd, M. Sproston, A. M. Lee, M. Kolrep, Robert M Brown, M. Tecchio, E. von Törne, M. Starks, A. Joly, S. De Jong, N. I. Geddes, Michael Hildreth, Ehud Duchovni, M. Jimack, N. L. Rodning, B. Poli, H. Przysiezniak, A. Michelini, A. N. Bell, Satoshi Tanaka, T. Kobayashi, M. F. Turner-Watson, R. Lahmann, M. Morii, D. C. Imrie, Peter R Hobson, P. Routenburg, G. P. Siroli, Sachio Komamiya, Theodoros Geralis, E. Ros, and T. P. Kokott
Subjects: Quark, Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Charged particle, Gluon, Nuclear physics, High Energy Physics::Experiment, Multiplicity (chemistry), Nuclear Experiment, Parton shower, Particle Physics - Experiment
Abstract: Gluon jets with about 39 GeV energy are identified in hadronic Z 0 decays by tagging two jets in the same hemisphere of an event as quark jets. Identifying the gluon jet to be all the particles observed in the hemisphere opposite to that containing the two tagged jets yields an inclusive gluon jet definition corresponding to that used in analytic calculations, allowing the first direct test of those calculations. In particular, this jet definition yields results which are only weakly dependent on a jet finding algorithm. We find r ch. =1.552±0.0041 ( stat ) ±0.061 ( syst. ) for the ratio of the mean charged particle multiplicity in gluon jets to that in light quark uds jets, where the uds jets are identified using an inclusive jet definition similar to that used for the gluon jets. Our result is in general agreement with the prediction of a recent analytic calculation which incorporates energy conservation into the parton shower branching processes, but is considerably smaller than analytic predictions which do not incorporate energy conservation.
Published: 1996

33. Measurement of the branching fraction of the radiative decay τ → μνγ

Author: Frank Fiedler, S. M. Gascon-Shotkin, R. W. Springer, O. C. Cooke, R. Bartoldus, T. J. Smith, K. Stephens, V. Gibson, Silvia Arcelli, T. R. Junk, U. Ruppel, M. R. Ingram, D. R. Ward, H. Lafoux, T. Kress, G. G. Hanson, Achim Stahl, Matthias Schröder, C. Hartmann, D. E. Plane, Stephen Hillier, G. M. Dallavalle, A. I. McNab, D. Axen, A. Jawahery, R. Van Kooten, Otmar Biebel, Matthew Evans, H. O. Ogren, A. M. Rossi, G. Giacomelli, M. Thiergen, N. K. Watson, S. Yamashita, J. Goldberg, K. Sachs, Shlomo Dado, Christoph Geich-Gimbel, M. Schumacher, E. Lefebvre, P. Igo-Kemenes, P. Schenk, K. Ishii, H. Jeremie, B. Nellen, T. Tsukamoto, E. Tsur, M. Verzocchi, K. W. Bell, J. Pálinkás, E. A. Mckigney, S. R. Lautenschlager, H. A. Neal, W. P. Lai, Peter Sherwood, Alexander Wagner, S. L. Chu, John Allison, W. R. Gibson, M. S. Dixit, R. E. Hughes-Jones, J. Ludwig, J. C. Hill, Frans Meijers, Misao Sasaki, P. Poffenberger, J. Letts, K. Runge, P. Bock, F. Odorici, Norbert Wermes, H. G. Evans, W. J. McDonald, M. J. Goodrick, B. C. Shen, I. Cohen, J. Lauber, P. S. Wells, Sherry Towers, T. Kawamoto, F. Wäckerle, J. von Krogh, Gregor Herten, O. Schaile, E. do Couto e Silva, J. M. Roney, N. I. Geddes, Siegfried Bethke, A. K. Honma, B. Nijjhar, W. G. Scott, P. Schütz, D. M. Gingrich, B. T. Bouwens, Michael Hildreth, S. Orito, M. Rosvick, Dave Charlton, P. E.L. Clarke, M. K. Jones, P. Pfeifenschneider, Terry Richard Wyatt, T. Hilse, Giora Mikenberg, Gunter Wolf, F. X. Gentit, I. Nakamura, B. Wilkens, R. M. Brown, F. Strumia, S. D. Talbot, N. L. Rodning, M. Hapke, Lorne Levinson, J. P. Martin, B. Poli, A. Gaidot, J. E. Bloomer, P. Berlich, D. E. Hutchcroft, Sven Menke, R. Kowalewski, J. E. Conboy, James Pinfold, S. De Jong, S. Braibant, A. Fürtjes, H. M. Fischer, M. J. Oreglia, R. J. Hawkings, A. Skillman, J. Patt, D. G. Fong, C. Lewis, A. D. Schaile, Gabriella Pasztor, P. G. Estabrooks, R. K. Keeler, D. Glenzinski, Dezso Horvath, M. J. Losty, R. G. Kellogg, M. Steiert, Jean-Arcady Meyer, J. E. Pilcher, O. Runolfsson, U. Müller, U. Jost, H. Mes, R. Bürgin, J. R. Carter, G. N. Patrick, J. Gascon, P. M. Watkins, G. A. Snow, C. P. Ward, Csaba Hajdu, A. J. Martin, H. Przysiezniak, R. Mir, I. P. Duerdoth, P. Gagnon, S. A. Robins, L. A. del Pozo, Kiyotomo Kawagoe, A. N. Bell, P. Fath, Stefano Marcellini, Reda Tafirout, Klaus Kurt Desch, W. Mohr, S. Söldner-Rembold, T. Behnke, M. Boutemeur, F. S. Merritt, C. Beeston, A. Sittler, S. W. O'Neale, Stefan Kluth, K. J. Anderson, Shlomit Tarem, T. J. McMahon, Robert McPherson, Paolo Giacomelli, Claudio Grandi, A. Posthaus, D. M. Strom, M. Hansroul, K. Ametewee, A. Rooke, J. G. Layter, H. M. Bosch, F. G. Oakham, Ekg Sarkisyan, C. Burgard, R. K. Carnegie, M. Gruwé, B. Schmitt, C. Y. Chang, P. Taras, E. L. Barberio, Mathieu Doucet, R. Rylko, C. K. Hargrove, J. Bechtluft, P. W. Jeffreys, Michael Kobel, W. Matthews, R. J. Homer, Tara Shears, M. Bobinski, J. A. Wilson, C. Charlesworth, C. M. Hawkes, J. A. McKenna, Gideon Alexander, P. Weber, A. Joly, Daniel Lellouch, R. D. Heuer, Paolo Capiluppi, Gideon Bella, P. A. Hart, Takehiko Mori, Fabrizio Fabbri, Richard Nisius, C. H. Shepherd-Themistocleous, Marco Cuffiani, S. B. Anderson, P. Szymanski, A. Malik, H. J. Burckhart, M. J. Pearce, Jacqueline Batley, M. A. Thomson, D. Rigby, R. J. Hemingway, V. Zacek, K. Nagai, R. Lahmann, D. Lazic, D. C. Imrie, Julie Kirk, J. W. Gary, J. J. Ward, P. Vikas, D. Lanske, C. Sbarra, M. Starks, D. S. Koetke, D. Chrisman, D. R. Rust, B. Stockhausen, Paul Kyberd, E. K. U. Gross, F. K. Loebinger, G. P. Siroli, Volker Blobel, J. Steuerer, G. Yekutieli, Joleen Pater, Stefan Schmitt, Marcello Mannelli, G. Azuelos, G. W. Wilson, Stan Bentvelsen, R. Giacomelli, M. Hauschild, T. Omori, M. Sproston, R. Howard, S. A. Wotton, J. S. White, A. A. Carter, C. Markus, Ron Folman, Roger Jones, Stephen Lloyd, M. Fierro, J. E.G. Edwards, G. T. Jones, E. H. Vokurka, B. J. King, P. Utzat, B. W. Kennedy, P. Jovanovic, A. M. Lee, M. F. Turner-Watson, M. Morii, M. Tecchio, E. von Törne, Ehud Duchovni, M. Jimack, A. Michelini, C. R. Jones, Satoshi Tanaka, T. Kobayashi, Hans-Christian Schultz-Coulon, Austin Ball, Peter R Hobson, P. Scharff-Hansen, Randall Sobie, Michael Schulz, G. D. Lafferty, Peter Krieger, P. Mättig, Shoji Asai, P. Routenburg, Manuella Vincter, Alessandro Montanari, Sachio Komamiya, Guenter Duckeck, Theodoros Geralis, E. Ros, A. T. Watson, C. Dallapiccola, A. S. Turcot, I. J. Bloodworth, A. M. Smith, T. P. Kokott, N. Altekamp, H. Voss, G. Vasseur, R. J. Barlow, M. Kolrep, D. J. Miller, Andris Skuja, Yoram Rozen, S. Petzold, G. D. Long, Tetsuro Mashimo, M. Foucher, W. Gorn, D. Karlen, D. L. Rees, F. Scharf, and German Martinez
Subjects: Physics, Nuclear and High Energy Physics, Photon, Branching fraction, Electron–positron annihilation, Radiative transfer, Radiative decay, Rest frame, Atomic physics, Standard Model
Abstract: The branching ratio of the radiative τ decay τ − → μ − ν μ ν τ γ has been measured using data collected with the OPAL detector at LEP. The result is B(τ − → μ − ν μ ν τ γ) = (3.0 ± 0.4 ± 0.5) × 10 −3 for photon energies above 20 MeV measured in the τ rest frame. The result is in good agreement with the Standard Model expectation.
Published: 1996

34. Test of the four-fermion contact interaction in e+e− collisions at 130–140 GeV

Author: S. R. Lautenschlager, H. A. Neal, T. Hilse, O. Runolfsson, D. J. Miller, Claudio Grandi, T. R. Wyatt, R. J. Barlow, M. Fierro, J. E.G. Edwards, H. Mes, Ekg Sarkisyan, R. Bartoldus, P. W. Jeffreys, H. O. Ogren, Christoph Geich-Gimbel, Gideon Bella, Daniel Lellouch, C. H. Shepherd-Themistocleous, H. J. Burckhart, M. Hapke, S. M. Gascon-Shotkin, J. J. Ward, P. Vikas, D. Lanske, S. Braibant, Andris Skuja, S. Petzold, G. D. Long, Tetsuro Mashimo, Jacqueline Batley, P. G. Estabrooks, A. S. Turcot, R. K. Keeler, Takehiko Mori, I. P. Duerdoth, A. D. Schaile, T. Omori, M. J. Oreglia, Gabriella Pasztor, P. Fath, F. X. Gentit, V. Zacek, N. K. Watson, W. Gorn, Matthew Evans, A. M. Rossi, J. E. Conboy, A. Fürtjes, R. W. Springer, C. R. Jones, T. Tsukamoto, P. M. Watkins, G. A. Snow, C. P. Ward, S. Söldner-Rembold, H. M. Fischer, P. Poffenberger, P. Scharff-Hansen, G. N. Patrick, I. J. Bloodworth, Otmar Biebel, M. F. Turner-Watson, M. Morii, Peter R Hobson, J. Palinkas, A. M. Smith, P. Schütz, S. A. Robins, Yoram Rozen, Dave Charlton, Georges Azuelos, K. Sachs, P. Routenburg, Sachio Komamiya, M. Schumacher, E. Tsur, C. M. Hawkes, E. Lefebvre, M. Foucher, Shlomo Dado, S. L. Chu, W. Mohr, M. Boutemeur, F. S. Merritt, G. Vasseur, A. Posthaus, J. Letts, M. Verzocchi, James Pinfold, J. R. Carter, R. Bürgin, Silvia Arcelli, K. W. Bell, F. Odorici, Norbert Wermes, Sherry Towers, Theodoros Geralis, E. Ros, A. T. Watson, S. Yamashita, J. Lauber, T. Kawamoto, P. Igo-Kemenes, S. B. Anderson, P. Szymanski, G. Giacomelli, J. Bechtluft, J. A. McKenna, D. G. Fong, C. Lewis, Stefan Kluth, J. Gascon, Giora Mikenberg, Shlomit Tarem, D. Karlen, U. Jost, R. Mir, J. C. Hill, Misao Sasaki, C. Y. Chang, S. Orito, M. Rosvick, W. J. McDonald, K. Ishii, H. Jeremie, R. E. Hughes-Jones, N. I. Geddes, Michael Hildreth, F. Strumia, S. D. Talbot, T. P. Kokott, A. Luig, E. A. Mckigney, N. L. Rodning, P. Taras, A. Malik, J. W. Gary, W. P. Lai, D. S. Koetke, B. Poli, Marcello Mannelli, Michael Kobel, V. Gibson, O. Schaile, Stan Bentvelsen, B. C. Shen, Siegfried Bethke, A. K. Honma, W. G. Scott, I. Nakamura, Stefan Schmitt, D. L. Rees, A. I. McNab, F. Scharf, J. Goldberg, T. J. Smith, J. M. Roney, F. G. Oakham, B. Stockhausen, Paul Kyberd, F. K. Loebinger, E. do Couto e Silva, B. Schmitt, G. D. Lafferty, J. Steuerer, T. Behnke, German Martinez, Eilam Gross, Julie Kirk, E. L. Barberio, B. Nellen, P. Mättig, D. E. Hutchcroft, Joleen Pater, Sven Menke, D. Glenzinski, Shoji Asai, P. Gagnon, J. Allison, Reda Tafirout, Klaus Kurt Desch, P. A. Hart, M. Gruwé, R. Giacomelli, W. Matthews, C. Dallapiccola, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, A. Sittler, H. G. Evans, B. Nijjhar, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, H. M. Bosch, M. J. Pearce, M. A. Thomson, Richard Nisius, N. Altekamp, A. Gaidot, M. J. Goodrick, S. W. O'Neale, I. Cohen, M. Sproston, K. J. Anderson, Marco Cuffiani, A. Joly, C. Hartmann, Guenter Duckeck, D. E. Plane, D. Axen, A. Jawahery, Gunter Wolf, Matthias Schröder, R. Kowalewski, Peter Sherwood, M. Thiergen, D. Rigby, R. J. Hemingway, Stephen Hillier, G. M. Dallavalle, H. Lafoux, Alexander Wagner, J. Ludwig, K. Runge, K. Ametewee, P. Bock, B. W. Kennedy, P. Jovanovic, Gideon Alexander, Paolo Capiluppi, K. Stephens, Austin Ball, Peter Krieger, W. R. Gibson, R. G. Kellogg, Manuella Vincter, Alessandro Montanari, M. Steiert, Csaba Hajdu, Stefano Marcellini, B. T. Bouwens, U. Müller, A. J. Martin, D. Chrisman, Volker Blobel, Lorne Levinson, Stephen Lloyd, A. Skillman, Robert M Brown, T. R. Junk, C. K. Hargrove, Ehud Duchovni, M. Jimack, A. Michelini, D. R. Ward, Satoshi Tanaka, T. Kobayashi, T. Kress, Frank Fiedler, U. Ruppel, M. R. Ingram, Paolo Giacomelli, M. Hansroul, C. Burgard, R. J. Homer, Achim Stahl, T. J. McMahon, P. Pfeifenschneider, R. K. Carnegie, J. Patt, M. Bobinski, J. A. Wilson, G. G. Hanson, P. Schenk, D. Lazic, M. S. Dixit, C. Sbarra, Frans Meijers, G. Yekutieli, A. Rooke, J. G. Layter, C. Charlesworth, A. A. Carter, Ron Folman, Roger Jones, P. E.L. Clarke, M. K. Jones, J. P. Martin, S. De Jong, B. J. King, P. Utzat, H. Przysiezniak, A. N. Bell, O. C. Cooke, J. von Krogh, R. J. Hawkings, L. A. del Pozo, R. Lahmann, D. C. Imrie, G. P. Siroli, Kiyotomo Kawagoe, P. Weber, K. Nagai, P. S. Wells, D. R. Rust, J. E. Bloomer, D. M. Strom, R. Rylko, A. M. Lee, M. Tecchio, E. von Törne, R. Howard, J. S. White, R. Van Kooten, C.J. Beeston, T. G. Shears, F. Wäckerle, D. M. Gingrich, P. Berlich, Robert McPherson, Mathieu Doucet, R. D. Heuer, Fabrizio Fabbri, Gregor Herten, B. Wilkens, J. E. Pilcher, M. Starks, G. W. Wilson, M. Hauschild, S. A. Wotton, C. Markus, G. T. Jones, and E. H. Vokurka
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Electron–positron annihilation, Fermion, Particle Physics - Experiment, Standard Model
Abstract: The differential cross-sections for e + e − → e + e − , e + e − → μ + μ − and e + e − → τ + τ − , and the total cross-section for e + e − → qq at centre-of-mass energies of 130–140 GeV were studied using about 5 pb −1 of data collected with the OPAL detector at LEP in October and November 1995. The results are in agreement with the Standard Model predictions. Four-fermion contact interaction models were fitted to the data and lower limits were obtained on the energy scale Λ at the 95% confidence level.
Published: 1996

35. Prompt production in hadronic Z0 decays

Author: R. Van Kooten, Gideon Bella, C. H. Shepherd-Themistocleous, H. J. Burckhart, F. Wäckerle, C. Y. Chang, J. Lauber, P. Berlich, A. S. Turcot, M. Hapke, Ekg Sarkisyan, Jacqueline Batley, P. Taras, D. R. Rust, A. M. Lee, M. Tecchio, E. von Törne, Sachio Komamiya, D. E. Hutchcroft, R. Bartoldus, R. W. Springer, D. M. Strom, A. Rooke, G. Azuelos, T. Omori, I. J. Bloodworth, J. G. Layter, O. C. Cooke, S. Yamashita, P. Igo-Kemenes, Theodoros Geralis, E. Ros, A. T. Watson, Madjid Boutemeur, M. J. Oreglia, F. Strumia, S. D. Talbot, H. O. Ogren, Christoph Geich-Gimbel, P. W. Jeffreys, H. Fukui, C. Charlesworth, R. Rylko, Julie Kirk, H. Jeremie, K. Stephens, Gregor Herten, James Pinfold, J. E. Conboy, T. P. Kokott, R. E. Hughes-Jones, D. G. Fong, C. Lewis, H. Mes, I. P. Duerdoth, Gunter Wolf, F. X. Gentit, J. Gascon, Yoram Rozen, J. von Krogh, P. G. Estabrooks, R. K. Keeler, U. Jost, R. Mir, A. Luig, B. Wilkens, C. Hartmann, E. Tsur, D. E. Plane, M. Foucher, P. Fath, J. R. Carter, G. N. Patrick, G. G. Hanson, A. Fürtjes, R. J. Hawkings, J. P. Pansart, M. Verzocchi, K. W. Bell, E. do Couto e Silva, J. E. Pilcher, L. A. del Pozo, C. Sbarra, A. Malik, D. Karlen, C. Burgard, Stephen Hillier, S. B. Anderson, J. Pálinkás, P. Szymanski, J. W. Gary, Otmar Biebel, D. S. Koetke, P. S. Wells, P. Schenk, S. W. O'Neale, G. Yekutieli, Terry Richard Wyatt, Marcello Mannelli, Stefan Schmitt, E. Lefebvre, P. M. Watkins, K. J. Anderson, Sven Menke, G. M. Dallavalle, A. Sittler, F. S. Merritt, M. S. Dixit, Frans Meijers, J. E. Bloomer, Dave Charlton, A. A. Carter, Ron Folman, Roger Jones, T. J. Smith, F. G. Oakham, F. Odorici, J. C. Hill, Stan Bentvelsen, P. E.L. Clarke, M. K. Jones, H. M. Bosch, J. P. Martin, Misao Sasaki, W. J. McDonald, B. C. Shen, T. R. Junk, Siegfried Bethke, B. J. King, J. Bechtluft, J. A. McKenna, M. Kobe, M. Tscheulin, J. Ludwig, P. Utzat, O. Schaile, P. Mättig, Shoji Asai, R. Bürgin, M. F. Turner-Watson, Andris Skuja, S. Petzold, G. D. Long, Tetsuro Mashimo, M. Morii, S. De Jong, Silvia Arcelli, J. Letts, E. L. Barberio, Daniel Lellouch, N. Werrnes, B. Nijjhar, C. Dallapiccola, W. G. Scott, Sherry Towers, Peter R Hobson, P. Poffenberger, T. J. McMahon, J. J. Ward, P. Vikas, M. Starks, D. Lanske, Takehiko Mori, H. Przysiezniak, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, G. D. Lafferty, Stefan Kluth, Shlomit Tarem, T. Kawamoto, R. K. Carnegie, P. Routenburg, G. Giacomelli, D. Axen, P. Pfeifenschneider, W. Gorn, A. Jawahery, A. N. Bell, J. A. Wilson, D. R. Ward, H. Lafoux, R. J. Barlow, D. J. Miller, V. Zacek, P. Schütz, S. Orito, E. A. Mckigney, M. Rosvick, Reda Tafirout, Klaus Kurt Desch, A. I. McNab, Peter Sherwood, T. Kress, D. Lazic, G. W. Wilson, R. Howard, J. S. White, M. Hauschild, J. Goldberg, S. R. Lautenschlager, S. A. Wotton, Guenter Duckeck, W. P. Lai, P. Scharff-Hansen, Alexander Wagner, A. K. Honrna, A. Gaidot, K. Runge, P. Bock, C. Markus, Dezso Horvath, M. J. Losty, J. M. Roney, H. A. Neal, D. Rigby, R. J. Hemingway, Jean-Arcady Meyer, H. G. Evans, U. Ruppel, M. R. Ingram, M. J. Goodrick, G. T. Jones, E. H. Vokurka, T. Hilse, A. M. Smith, I. Cohen, B. W. Kennedy, P. Jovanovic, G. Vasseur, Austin Ball, Peter Krieger, Manuella Vincter, Alessandro Montanari, O. Runolfsson, S. Braibant, Gabriella Pasztor, C. Beeston, Claudio Grandi, G. A. Snow, C. P. Ward, P. Gagnon, S. Söldner-Rembold, A. Joly, M. Fierro, J. E.G. Edwards, C. R. Jones, Shlomo Dado, Paolo Giacomelli, Kiyotomo Kawagoe, M. Hansroul, P. Weber, Giora Mikenberg, R. Lahmann, D. C. Imrie, B. Stockhausen, Paul Kyberd, F. K. Loebinger, G. P. Siroli, R. J. Homer, S. L. Chu, J. Hoare, J. Steuerer, Joleen Pater, S. M. Gascon-Shotkin, Frank Fiedler, Achim Stahl, R. Giacomelli, B. Schmitt, N. Altekamp, Matthew Evans, A. M. Rossi, T. Behnke, U. Müller, A. J. Martin, T. Tsukamoto, Eilam Gross, John Allison, C. K. Hargrove, Matthias Schröder, M. Thiergen, M. Gruwé, C. M. Hawkes, Ehud Duchovni, D. M. Gingrich, M. Jimack, N. I. Geddes, B. Nellen, V. Gibson, Michael Hildreth, R. G. Kellogg, M. Steiert, A. Michelini, Tara Shears, Richard Nisius, Csaba Hajdu, N. L. Rodning, Marco Cuffiani, P. A. Hart, Stefano Marcellini, Satoshi Tanaka, T. Kobayashi, B. Poli, M. J. Pearce, H. M. Fischer, D. Chrisman, S. A. Robins, Volker Blobel, Stephen Lloyd, Robert M Brown, R. Kowalewski, K. Ametewee, Gideon Alexander, Paolo Capiluppi, W. R. Gibson, B. T. Bouwens, Lorne Levinson, Gilles Beaudoin, A. Skillman, Robert McPherson, Mathieu Doucet, R. D. Heuer, Fabrizio Fabbri, W. Matthews, M. A. Thomson, T. Wlodek, M. Sproston, D. L. Rees, F. Scharf, German Martinez, A. D. Schaile, N. K. Watson, W. Mohr, and A. Posthaus
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Meson, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, Hadron, Energy spectrum, Tevatron, High Energy Physics::Experiment, Lepton
Abstract: Evidence is presented for the production of prompt J/psi mesons (not originating in b-hadron decays) in hadronic Z(0) decays. Using a sample of 3.6 million hadronic events, 24 prompt J/psi candidates are identified from their decays into e(+)e(-) and mu(+)mu(-)pairs. The background is estimated to be 10.2+/-2.0 events. The following branching ratio for prompt J/psi production is obtained: Br(Z(0)-->prompt J/psi+X)=(1.9+/-0.7+/-0.5+/-0.5). 10(-4), where the first error is statistical, the second systematic and the third error accounts for uncertainties in the prompt J/psi production mechanism.
Published: 1996

36. A first measurement of the Λ and ΛΛ () spin compositions in hadronic Z0 decays

Author: S. Yamashita, Dave Charlton, F. S. Merritt, W. J. McDonald, Stefan Kluth, Shlomit Tarem, B. C. Shen, Otmar Biebel, P. Igo-Kemenes, H. Jeremie, R. E. Hughes-Jones, Siegfried Bethke, R. Bürgin, O. Schaile, A. K. Honma, B. Nijjhar, D. E. Plane, W. G. Scott, Stephen Hillier, Robert McPherson, J. Bechtluft, Madjid Boutemeur, G. M. Dallavalle, J. A. McKenna, M. Starks, E. do Couto e Silva, H. O. Ogren, A. A. Carter, Christoph Geich-Gimbel, J. E. Conboy, U. Jost, R. Mir, A. Fürtjes, Stefan Schmitt, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, P. Poffenberger, Sven Menke, P. G. Estabrooks, R. K. Keeler, Mathieu Doucet, Gideon Bella, J. E. Bloomer, C. H. Shepherd-Themistocleous, H. J. Burckhart, R. D. Heuer, Fabrizio Fabbri, A. I. McNab, P. Schütz, P. M. Watkins, Jacqueline Batley, J. Goldberg, J. Letts, T. J. McMahon, P. Mättig, A. Gaidot, D. R. Rust, B. Nellen, E. Lefebvre, M. F. Turner-Watson, R. W. Springer, M. Morii, T. Omori, Gregor Herten, F. Odorici, A. Rooke, F. G. Oakham, Shoji Asai, Peter R Hobson, E. L. Barberio, Norbert Wermes, Sherry Towers, Reda Tafirout, Klaus Kurt Desch, R. K. Carnegie, B. Wilkens, J. G. Layter, H. G. Evans, C. Dallapiccola, C. Charlesworth, R. Howard, M. J. Goodrick, P. Routenburg, J. S. White, A. M. Lee, E. Tsur, J. A. Wilson, T. Kawamoto, I. Cohen, Sachio Komamiya, M. Verzocchi, M. Tecchio, E. von Törne, C. Y. Chang, Theodoros Geralis, E. Ros, A. T. Watson, K. W. Bell, J. P. Pansart, J. Pálinkás, Gunter Wolf, F. X. Gentit, I. J. Bloodworth, J. C. Hill, Misao Sasaki, J. E. Pilcher, P. E.L. Clarke, N. Altekamp, P. Taras, W. R. Gibson, Michael Kobel, M. K. Jones, E. A. Mckigney, R. J. Barlow, J. P. Martin, S. Orito, M. Tscheulin, H. Mes, A. S. Turcot, B. T. Bouwens, I. P. Duerdoth, D. J. Miller, A. Luig, M. Rosvick, S. De Jong, R. Bartoldus, W. P. Lai, P. Fath, Yoram Rozen, D. Lazic, C. R. Jones, M. Foucher, R. M. Brown, G. W. Wilson, M. Hauschild, Lorne Levinson, S. A. Wotton, O. C. Cooke, Julie Kirk, T. P. Kokott, D. Axen, Gilles Beaudoin, A. Jawahery, C. Markus, J. M. Roney, A. Skillman, H. Przysiezniak, D. M. Strom, R. Van Kooten, D. Rigby, R. J. Hemingway, A. N. Bell, D. Karlen, C. Burgard, G. T. Jones, B. W. Kennedy, E. H. Vokurka, Daniel Lellouch, H. Fukui, P. Jovanovic, G. G. Hanson, M. Hapke, Austin Ball, J. von Krogh, R. Rylko, M. Fierro, J. E.G. Edwards, Takehiko Mori, Ekg Sarkisyan, P. W. Jeffreys, Peter Krieger, Peter Sherwood, V. Zacek, F. Wäckerle, G. Giacomelli, D. M. Gingrich, S. W. O'Neale, Manuella Vincter, R. J. Hawkings, Alessandro Montanari, K. J. Anderson, L. A. del Pozo, P. Schenk, C. Sbarra, D. E. Hutchcroft, M. S. Dixit, Frans Meijers, P. Berlich, J. J. Ward, Alexander Wagner, J. Ludwig, P. Vikas, K. Runge, G. Yekutieli, P. Bock, D. Lanske, S. R. Lautenschlager, J. Lauber, M. J. Oreglia, P. S. Wells, H. A. Neal, Ron Folman, Roger Jones, T. Hilse, O. Runolfsson, B. J. King, P. Utzat, Terry Richard Wyatt, C. Beeston, Claudio Grandi, J. R. Carter, G. N. Patrick, F. Strumia, S. D. Talbot, G. Azuelos, P. Gagnon, A. Sittler, Hans-Christian Schultz-Coulon, H. M. Bosch, Randall Sobie, Michael Schulz, G. D. Lafferty, Guenter Duckeck, C. Hartmann, P. Szymanski, Stan Bentvelsen, M. Sproston, Andris Skuja, S. Petzold, G. D. Long, Tetsuro Mashimo, Achim Stahl, W. Gorn, B. Stockhausen, Paul Kyberd, F. K. Loebinger, B. Schmitt, J. Steuerer, Joleen Pater, R. Giacomelli, P. Scharff-Hansen, P. Pfeifenschneider, A. Joly, A. M. Smith, G. Vasseur, Paolo Giacomelli, John Allison, M. Hansroul, James Pinfold, R. G. Kellogg, D. G. Fong, C. Lewis, M. Steiert, J. Gascon, R. J. Homer, Csaba Hajdu, Stefano Marcellini, A. Malik, J. W. Gary, D. S. Koetke, Marcello Mannelli, J. Hoare, U. Ruppel, M. R. Ingram, T. J. Smith, K. Stephens, V. Gibson, T. Behnke, T. R. Junk, D. R. Ward, H. Lafoux, T. Kress, M. Gruwé, S. Braibant, C. M. Hawkes, Gabriella Pasztor, Frank Fiedler, G. A. Snow, C. P. Ward, S. Söldner-Rembold, R. Lahmann, D. C. Imrie, Shlomo Dado, G. P. Siroli, Giora Mikenberg, Richard Nisius, Kiyotomo Kawagoe, P. Weber, D. Chrisman, Marco Cuffiani, Volker Blobel, S. L. Chu, N. I. Geddes, Stephen Lloyd, Michael Hildreth, N. L. Rodning, B. Poli, Ehud Duchovni, M. Jimack, A. Michelini, H. M. Fischer, Satoshi Tanaka, T. Kobayashi, S. A. Robins, U. Müller, S. M. Gascon-Shotkin, A. J. Martin, Matthew Evans, A. M. Rossi, T. Tsukamoto, R. Kowalewski, C. K. Hargrove, Matthias Schröder, M. Thiergen, K. Ametewee, Gideon Alexander, Tara Shears, Paolo Capiluppi, P. A. Hart, M. J. Pearce, D. L. Rees, F. Scharf, German Martinez, A. D. Schaile, N. K. Watson, W. Mohr, A. Posthaus, W. Matthews, M. A. Thomson, E. K. U. Gross, and T. Wlodek
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Spin states, Hadron, Hyperon, Nuclear physics, symbols.namesake, Pair production, Pauli exclusion principle, symbols, High Energy Physics::Experiment, Invariant mass, Spin (physics)
Abstract: The spin composition of Λ Λ , ΛΛ and Λ Λ pairs at low invariant mass values has been measured for the first time in multihadronic Z0 decays with the OPAL detector at LEP. No single spin state has been observed in the Λ Λ sample, verifying that the low mass enhancement in this sample, attributed to local baryon number compensation, is not a resonance state. The fraction of the spin 1 contribution to the Λ Λ pairs was found to be consistent with the value 0.75, as expected from a statistical spin mixture. This may be the net effect of many different QCD processes which contribute to the hyperon anti-hyperon pair production. The spin composition of the identical ΛΛ and Λ Λ pairs, well above threshold, is found to be similar to that of the Λ Λ sample. A ΛΛ emitter dimension is estimated from the data assuming the onset of the Pauli exclusion principle near threshold.
Published: 1996

37. Search for chargino and neutralino production using the OPAL detector at =130−136 GeV at LEP

Author: Tara Shears, W. J. McDonald, B. C. Shen, P. A. Hart, A. P. Wagner, Reda Tafirout, D. Chrisman, Volker Blobel, M. J. Pearce, Sachio Komamiya, Ekg Sarkisyan, Siegfried Bethke, B. Nijjhar, W. G. Scott, S. L. Chu, T. Behnke, J. Steuerer, M. Gruwé, C. M. Hawkes, Richard Nisius, P. Weber, Marco Cuffiani, Stephen Lloyd, G. G. Hanson, E. Ros, A. T. Watson, S. B. Anderson, P. Szymanski, Daniel Lellouch, T. J. Smith, K. Stephens, P. W. Jeffreys, E. Lefebvre, Andris Skuja, Koji Yoshimura, Takehiko Mori, S. Yamashita, W. R. Gibson, Madjid Boutemeur, F. Odorici, G. Giacomelli, Dezso Horvath, M. J. Losty, D. M. Strom, S. Petzold, G. D. Long, A. Joly, P. Poffenberger, P. Igo-Kemenes, Shlomo Dado, Matthias Schröder, T. P. Kokott, Stan Bentvelsen, Jean-Arcady Meyer, B. T. Bouwens, P. Schenk, M. Hauschild, A. Luig, Tetsuro Mashimo, H. Fukui, V. Zacek, F. S. Merritt, Ehud Duchovni, V. Gibson, P. G. Estabrooks, H. Jeremie, R. E. Hughes-Jones, R. K. Keeler, R. Rylko, R. M. Brown, Lorne Levinson, M. S. Dixit, M. Jimack, Frans Meijers, D. L. Rees, M. Hapke, M. Thiergen, H. Lafoux, D. E. Hutchcroft, Achim Stahl, F. Palmonari, Gilles Beaudoin, C. Sbarra, A. Skillman, F. Scharf, C. Markus, N. I. Geddes, German Martinez, J. J. Ward, W. Gorn, Michael Hildreth, P. Vikas, R. D. Heuer, P. M. Watkins, Giora Mikenberg, P. Schütz, E. do Couto e Silva, S. W. Gensler, Fabrizio Fabbri, S. Söldner-Rembol, A. S. Turcot, R. W. Springer, D. Lanske, A. D. Schaile, C. Hartmann, D. E. Plane, T. Kobayashi, J. Bechtluft, N. L. Rodning, B. Schmitt, Sven Menke, G. T. Jones, M. J. Oreglia, D. R. Ward, B. Stockhausen, Paul Kyberd, F. K. Loebinger, T. Kress, R. Lahmann, D. C. Imrie, M. Palazzo, J. A. McKenna, M. R. Ingram, E. H. Vokurka, James Pinfold, Stephen Hillier, Silvia Arcelli, G. M. Dallavalle, W. Matthews, B. Poli, S. Braibant, G. Yekutieli, D. R. Rust, Stefan Kluth, D. M. Gingrich, M. A. Thomson, E. Tsur, D. G. Fong, C. Lewis, Joleen Pater, C. Darling, Gabriella Pasztor, H. Mes, I. P. Duerdoth, Shlomit Tarem, J. Gascon, Paolo Giacomelli, M. Verzocchi, K. W. Bell, M. Hansroul, C. Y. Chang, E. K. U. Gross, R. Giacomelli, T. Hilse, R. Bartoldus, G. P. Siroli, J. King, P. Fath, O. Runolfsson, A. Gaidot, P. Mättig, J. Pálinkás, Shoji Asai, J. C. Hill, Gregor Herten, T. Wlodek, M. Sproston, S. M. Gascon-Shotkin, Christoph Geich-Gimbel, A. A. Carter, G. A. Snow, C. P. Ward, A. M. Lee, P. Taras, A. Rooke, Misao Sasaki, A. Malik, Carsten Daniel Burgard, J. G. Layter, Michael Kobel, M. Tecchio, A. H. Bain, I. J. Bloodworth, E. von Törne, J. W. Gary, Ron Folman, C. Beeston, E. A. Mckigney, W. P. Lai, R. Kowalewski, B. Wilkens, U. Müller, D. S. Koetke, C. Charlesworth, N. Tesch, J. R. Carter, G. N. Patrick, Otmar Biebel, Claudio Grandi, John Allison, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, G. D. Lafferty, Marcello Mannelli, Matthew Evans, Gunter Wolf, J. E. Pilcher, Julie Kirk, Stefania Xella, C. H. Shepherd-Themistocleous, A. M. Rossi, R. J. Homer, F. X. Gentit, A. J. Martin, R. Howard, Yoram Rozen, A. Fürtjes, M. F. Turner-Watson, N. K. Watson, K. Ametewee, M. Morii, Peter R Hobson, J. E. Conboy, J. S. White, Roger Jones, S. Wotton, J. P. Pansart, H. M. Fischer, J. M. Roney, P. Scharff-Hansen, P. E.L. Clarke, P. Utzat, M. K. Jones, Gideon Alexander, M. Foucher, A. Michelini, Paolo Capiluppi, R. G. Kellogg, J. P. Martin, R. Van Kooten, M. Tscheulin, P. Routenburg, A. I. McNab, S. De Jong, M. G. Rison, Guenter Duckeck, Frank Fiedler, J. Letts, G. W. Wilson, Junichi Kanzaki, S. A. Robins, D. Karlen, J. Goldberg, W. Mohr, O. Schaile, A. Posthaus, P. S. Wells, B. Nellen, M. Fierro, S. W. O'Neale, Norbert Wermes, Sherry Towers, T. Kawamoto, H. Przysiezniak, K. J. Anderson, T. J. McMahon, J. E.G. Edwards, A. M. Smith, Terry Richard Wyatt, C. K. Hargrove, M. Starks, J. E. Bloomer, A. N. Bell, F. Wäckerle, G. Vasseur, B. Lorazo, H. G. Evans, M. J. Goodrick, I. Cohen, S. Orito, J. Schwiening, M. Rosvick, R. K. Carnegie, P. Berlich, J. A. Wilson, O. C. Cooke, J. von Krogh, Csaba Hajdu, R. J. Hawkings, Stefano Marcellini, L. A. del Pozo, Gideon Bella, H. J. Burckhart, Jacqueline Batley, G. Azuelos, T. Omori, H. O. Ogren, D. Rigby, R. J. Hemingway, D. Axen, A. Jawahery, T. Geralis, B. W. Kennedy, P. Jovanovic, Peter Sherwood, Peter Krieger, Manuella Vincter, Alessandro Montanari, J. Ludwig, K. Runge, P. Bock, Dave Charlton, C. Dallapiccola, R. Bürgin, P. Gagnon, N. Altekamp, R. J. Barlow, D. J. Miller, A. K. Honma, U. Jost, R. Mir, A. Sittler, H. Takeda, F. G. Oakham, E. L. Barberio, H. M. Bosch, J. Lauber, and F. Strumia
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, High Energy Physics::Phenomenology, Detector, Scalar (mathematics), Lightest Supersymmetric Particle, Lower limit, Nuclear physics, Chargino, Neutralino, High Energy Physics::Experiment, Particle Physics - Experiment, Minimal Supersymmetric Standard Model
Abstract: A search for charginos and neutralinos, predicted by supersymmetric theories, has been performed using a data sample of 2.6 pb−1 at a centre-of-mass energy of S=130 GeV and 2.6 pb−1 at 136 GeV collected with the OPAL detector at LEP during November 1995. No candidate events were observed. The 95% C.L. lower limit on the lightest chargino mass in the Minimal Supersymmetric Standard Model is 65.4 GeV if the universal scalar mass m0 is greater than 1 TeV, and 58.7 GeV for the smallest m0 compatible with slepton and sneutrino mass limits obtained at centre-of-mass energies near the Z peak. These limits were obtained under the conditions that the lightest chargino is heavier than the lightest neutralino by more than 10 GeV and tan β is larger than 1.5. The results of a model independent search for charginos and neutralinos are also given.
Published: 1996

38. Upper limit on theν τ mass fromτ → 3hν τ decays

Author: B. C. Shen, Siegfried Bethke, W. G. Scott, P. Weber, Otmar Biebel, S. Komamiya, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, D. Karlen, Carsten Daniel Burgard, Georges Azuelos, U. Jost, R. Mir, E. Tsur, I. J. Bloodworth, C. M. Hawkes, David G. Charlton, K. W. Bell, D. C. Imrie, E. Lefebvre, G. Duckeck, S. J. De Jong, J. C. Hill, P. Igo-Kemenes, H. Jeremie, James Pinfold, J. Schwiening, F. Odorici, M. Palazzo, Ehud Duchovni, Marco Verzocchi, Yoram Rozen, M. Foucher, R. Bartoldus, H. Takeda, R. D. Heuer, R. E. Hughes-Jones, O. Schaile, E. A. Mckigney, W. P. Lai, Gideon Bella, F. G. Oakham, D. G. Fong, C. Lewis, G. P. Siroli, J. King, O. C. Cooke, V. Gibson, J. Gascon, Hans-Christian Schultz-Coulon, Michael Schulz, P. S. Wells, E. do Couto e Silva, E. L. Barberio, David E. Plane, M. F. Turner-Watson, Meirin Oan Evans, M. Morii, Peter R Hobson, Frank Fiedler, J. A. McKenna, J. Steuerer, H. J. Burckhart, Jacqueline Batley, G. W. Wilson, Junichi Kanzaki, S. W. Gensler, Eduardo Ros, Matthew Jones, J. W. Gary, H. O. Ogren, Reda Tafirout, G.Marco Dallavalle, B. Stockhausen, F. K. Loebinger, P. Schütz, S. J. Hillier, B. Schmitt, Christoph Geich-Gimbel, Mathieu Doucet, Gabriella Pasztor, Matthias Schröder, Sherry Towers, V. Zacek, Sven Menke, J. E. Bloomer, T. Kawamoto, G. D. Lafferty, D. Axen, K. Stephens, A. Jawahery, J. von Krogh, Daniel Lellouch, E.K.G. Sarkisian, D. Rigby, R. J. Hemingway, I. P. Duerdoth, BT Bouwens, W.John McDonald, Takehiko Mori, P. Szymanski, S. Orito, M. Gruwe, P. Fath, Joleen Pater, Peter Sherwood, Fabrizio Fabbri, Hildreth, M. Sasaki, M. Rosvick, Koji Yoshimura, T. Kress, Marcello Mannelli, Carla Sbarra, P. Jovanovic, Stan Bentvelsen, P. G. Estabrooks, A. D. Schaile, A. S. Turcot, R. Giacomelli, M. Hauschild, Paolo Giacomelli, W. R. Gibson, G. A. Snow, C. P. Ward, R. J. Hawkings, Robert Wayne Springer, M. Hansroul, M. Hapke, S. A. Wotton, Peter Krieger, T. P. Kokott, A. Luig, R. Kowalewski, M. Thiergen, H. Lafoux, L. A. del Pozo, R. W. L. Jones, D. L. Rees, Manuella Vincter, Alessandro Montanari, S. Söldner-Rembold, Richard Keeler, P. M. Watkins, C. Markus, N. K. Watson, S. M. Gascon-Shotkin, Rick J. Van Kooten, S. W. O'Neale, D. R. Ward, P. Scharff-Hansen, R. Bürgin, D. E. Hutchcroft, T. J. McMahon, C. H. Shepherd-Themistocleous, M. R. Ingram, Stefan Kluth, M. Jimack, John Allison, Shlomit Tarem, C. Dallapiccola, G. Mikenberg, K. Ametewee, R. J. Sobie, J. Ludwig, R. J. Homer, Lorne Levinson, Gideon Alexander, T. Behnke, Paolo Capiluppi, K. J. Anderson, R. K. Carnegie, F. X. Gentit, M. J. Oreglia, C. Darling, T. J. Smith, C.J. Beeston, A. K. Honma, N. Altekamp, J. Palinkas, B. W. Kennedy, A. M. Rossi, K. Runge, P. Bock, S. Braibant, J. A. Wilson, J. E. Conboy, M. J. Kobel, P. Mättig, A. Fürtjes, Gilles Beaudoin, Shlomo Dado, G. T. Jones, A. M. Smith, R. G. Kellogg, Roger Barlow, P.A. Hart, T. Geralis, Shoji Asai, D. S. Koetke, Csaba Hajdu, E. H. Vokurka, D. J. Miller, M. Tecchio, C. Y. Chang, Doug Gingrich, R. Howard, A. I. McNab, Richard Nisius, J. S. White, G. Vasseur, Tara Shears, Abish Malik, Stefano Marcellini, J. Goldberg, B. Lorazo, P. Taras, Volker Blobel, James Letts, A. Stahl, P R Poffenberger, J. P. Pansart, B. Nellen, Andris Skuja, Eugene P. Gross, F. Wäckerle, S. Petzold, C. Hartmann, G. D. Long, Tetsuro Mashimo, Marco Cuffiani, Stephen Lloyd, G. N. Patrick, F. S. Merritt, P.G. Bright-Thomas, H. Fischer, Robert M Brown, Julie Kirk, A. Joly, G. Yekutieli, N. L. Rodning, H. G. Evans, B. Poli, B. Nijjhar, A. P. Wagner, N. I. Geddes, M. J. Pearce, M. J. Goodrick, P. Vikas, I. Cohen, P. Gagnon, S. L. Chu, W. Gorn, A. A. Carter, O. Runolfsson, Alan Watson, Ron Folman, S. B. Anderson, J. Bechtluft, J.A. Lauber, A. Michelini, Gy. Wolf, P. Berlich, Thomson, D. M. Strom, P. Utzat, F. Scharf, German Martinez, M. G. Rison, S. A. Robins, H. Fukui, R. Rylko, J. R. Carter, D. R. Rust, Gregor Herten, A. Sittler, U. Müller, Norbert Wermes, B. Wilkens, A. J. Martin, J. E. Pilcher, P. Kyberd, C. K. Hargrove, E. von Törne, W. Matthews, H. M. Bosch, M. Starks, A. Skillman, A. Gaidot, T. Wlodek, H. Mes, M. Sproston, F. Strumia, P. Routenburg, N. Tesch, Satoru Yamashita, D Chrisman, J. M. Roney, Tsunehiko Omori, T. R. Wyatt, P. E. L. Clarke, W. Mohr, A. Posthaus, M. Boutemeur, M. Fierro, J. E.G. Edwards, T. Hilse, Claudio Grandi, A. Rooke, J. G. Layter, C. Charlesworth, Dixit, P. W. Jeffreys, T. Kobayashi, A. M. Lee, Stefania Xella, Robert Lahmann, M. Tscheulin, J.P. Martin, H. Przysiezniak, A. N. Bell, J. J. Ward, D. Lanske, G. G. Hanson, G. Giacomelli, P. Schenk, Frans Meijers, A. H. Ball, and Silvia Arcelli
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), Electron–positron annihilation, Tau neutrino, Limit (mathematics), Lower limit
Published: 1996

39. Topological search for the production of neutralinos and scalar particles

Author: C. Sbarra, G. Yekutieli, Ehud Duchovni, J. Lauber, Shlomo Dado, A. S. Turcot, Dave Charlton, A. A. Carter, Ron Folman, M. Jimack, Roger Jones, P. E.L. Clarke, M. K. Jones, Otmar Biebel, P. Utzat, Reda Tafirout, S. W. Gensler, T. Kobayashi, J. P. Martin, M. Kobe, M. Tscheulin, Matthias Schröder, Giora Mikenberg, M. Thiergen, F. Strumia, M. G. Rison, R. Bürgin, Andris Skuja, S. Petzold, G. D. Long, Frank Fiedler, P. S. Wells, Terry Richard Wyatt, J. E. Bloomer, H. Mes, I. P. Duerdoth, P. Fath, H. M. Fischer, A. Michelini, O. Schaile, M. Starks, Sachio Komamiya, Theodoros Geralis, E. Ros, R. Kowalewski, B. Stockhausen, Paul Kyberd, S. A. Robins, E. Lefebvre, F. Odorici, T. P. Kokott, K. Ametewee, F. K. Loebinger, S. De Jong, Tara Shears, Gideon Alexander, A. Luig, H. Przysiezniak, R. W. Springer, Tetsuro Mashimo, K. Stephens, Paolo Capiluppi, Gregor Herten, D. J. Miller, J. Steuerer, A. I. McNab, J. Goldberg, B. Nellen, R. Bartoldus, B. Wilkens, I. J. Bloodworth, J. Letts, P. A. Hart, R. Lahmann, D. C. Imrie, M. Palazzo, H. O. Ogren, S. Braibant, Gabriella Pasztor, Norbert Wermes, T. Behnke, A. N. Bell, S. Yamashita, J. P. Pansart, Joleen Pater, W. R. Gibson, Richard Keeler, M. J. Pearce, Mathieu Doucet, Georges Azuelos, Sherry Towers, V. Gibson, J. E. Pilcher, Christoph Geich-Gimbel, T. J. McMahon, P. Igo-Kemenes, E. Tsur, S. M. Gascon-Shotkin, G. P. Siroli, J. King, R. D. Heuer, Fabrizio Fabbri, T. Kawamoto, B. T. Bouwens, M. Verzocchi, D. Axen, A. Jawahery, G. A. Snow, C. P. Ward, G. W. Wilson, K. W. Bell, J. Pálinkás, H. Jeremie, M. Hauschild, H. G. Evans, J. Schwiening, R. K. Carnegie, M. J. Goodrick, I. Cohen, M. Gruwé, J. C. Hill, Misao Sasaki, S. Söldner-Rembold, Peter Sherwood, M. Fierro, J. E.G. Edwards, C. Markus, C. M. Hawkes, R. E. Hughes-Jones, D. Chrisman, Volker Blobel, R. Giacomelli, Yoram Rozen, D. R. Rust, J. A. Wilson, W. J. McDonald, B. C. Shen, Siegfried Bethke, A. K. Honma, W. Gorn, G. T. Jones, Alexander Wagner, Ekg Sarkisyan, Lorne Levinson, P. W. Jeffreys, Matthew Evans, E. H. Vokurka, S. Orito, M. Rosvick, M. F. Turner-Watson, Achim Stahl, J. Ludwig, A. Rooke, D. R. Ward, H. Lafoux, A. M. Rossi, T. Kress, B. Nijjhar, W. G. Scott, J. G. Layter, M. Morii, Peter R Hobson, K. Runge, P. Bock, A. J. Martin, Gilles Beaudoin, Richard Nisius, R. Howard, M. Foucher, A. Skillman, A. M. Lee, P. Routenburg, P. Weber, Marco Cuffiani, Stephen Lloyd, M. Tecchio, E. von Törne, Robert M Brown, Gideon Bella, C. H. Shepherd-Themistocleous, H. J. Burckhart, S. Asa, J. S. White, S. W. O'Neale, C. Charlesworth, M. R. Ingram, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, E. do Couto e Silva, P. Scharff-Hansen, P. Gagnon, Stefan Kluth, Shlomit Tarem, P. Bright-Thomas, K. J. Anderson, N. I. Geddes, Michael Hildreth, M. Hapke, D. E. Plane, S. L. Chu, Jacqueline Batley, B. Schmitt, O. C. Cooke, R. Van Kooten, Stephen Hillier, U. Müller, N. L. Rodning, B. Poli, C. K. Hargrove, D. Rigby, R. J. Hemingway, Stefania Xella, D. E. Hutchcroft, Junichi Kanzaki, G. M. Dallavalle, J. E. Conboy, J. J. Ward, P. Vikas, A. Fürtjes, P. Poffenberger, A. M. Smith, Sven Menke, A. Sittler, G. Vasseur, B. Lorazo, F. Wäckerle, D. Karlen, C. Burgard, T. Omori, D. M. Gingrich, Alan Watson, J. von Krogh, D. Lanske, B. W. Kennedy, P. Jovanovic, Silvia Arcelli, P. Schütz, M. J. Oreglia, P. Berlich, R. J. Hawkings, A. Gaidot, Gunter Wolf, F. X. Gentit, H. M. Bosch, G. G. Hanson, L. A. del Pozo, Austin Ball, Peter Krieger, James Pinfold, C. Y. Chang, D. G. Fong, C. Lewis, J. Gascon, D. M. Strom, C. Darling, P. Taras, T. J. Smith, Manuella Vincter, Alessandro Montanari, Paolo Giacomelli, M. Hansroul, A. Malik, G. Giacomelli, E. A. Mckigney, J. W. Gary, P. Mättig, D. S. Koetke, S. Wotton, Marcello Mannelli, R. J. Homer, J. R. Carter, G. N. Patrick, Julie Kirk, U. Jost, R. Mir, H. Fukui, P. Schenk, R. Rylko, Daniel Lellouch, T. Hilse, S. B. Anderson, C. Hartmann, Takehiko Mori, P. Szymanski, F. S. Merritt, O. Runolfsson, W. P. Lai, V. Zacek, H. Takeda, M. S. Dixit, Frans Meijers, F. G. Oakham, E. L. Barberio, C. Dallapiccola, C. Beeston, A. Joly, N. Altekamp, Stan Bentvelsen, R. J. Barlow, J. Bechtluft, J. A. McKenna, Claudio Grandi, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, G. D. Lafferty, Guenter Duckeck, J. M. Roney, John Allison, Madjid Boutemeur, R. G. Kellogg, Csaba Hajdu, Stefano Marcellini, P. G. Estabrooks, P. M. Watkins, Koji Yoshimura, D. L. Rees, F. Scharf, German Martinez, A. D. Schaile, N. K. Watson, W. Mohr, A. Posthaus, W. Matthews, M. A. Thomson, E. K. U. Gross, T. Wlodek, M. Sproston, and N. Tesch
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Missing energy, Electron–positron annihilation, High Energy Physics::Phenomenology, Scalar (mathematics), Supersymmetry, law.invention, Nuclear physics, law, Neutralino, High Energy Physics::Experiment, Neutrino, Collider, Particle Physics - Experiment, Minimal Supersymmetric Standard Model
Abstract: A search for scalar particles and neutralinos such as those predicted by supersymmetric models has been performed using a data sample of 4.4 million hadronic Z 0 decays recorded by the OPAL detector at the e + e − collider LEP. The production of such particles typically leads to event topologies consisting of an acoplanar pair of jets, or of a mono-jet, accompanied by sizeable missing energy owing to neutrinos and other undetectable neutral particles. Limits are obtained, at the 95% confidence level, on the masses and production rates of scalar particles produced in association with the Z 0 . Limits are also placed on neutralino production, for which an additional possible signature is also studied, events containing a single observed photon. Within the Minimal Supersymmetric Standard Model, the mass of the lightest neutralino is found to be larger than 12.5 GeV/ c 2 at 95% C.L., provided that tan β is larger than 1.5.
Published: 1996

40. A study of the timing characteristics of scintillator counters with fine-mesh photomultiplier tubes

Author: M Herndon, H. Jawahery, and M. Foucher
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Photomultiplier, Detector, Cosmic ray, Time resolution, Scintillator, Instrumentation, B-factory
Abstract: We report on a study of the precision of Time-Of-Flight measurements using plastic scintillator counters with Fine Mesh Photomultiplier Tubes (FM PMT). This work was part of an investigation of several techniques considered for hadron identification in the B factory detector (BaBar) at SLAC. In cosmic ray tests of prototype counters we achieved a time resolution of 91 ps with a 3.0 m long counter and 70 ps with a 1.0 m long counter.
Published: 1996

41. Measurement of heavy quark forward-backward asymmetries and average B mixing using leptons in multihadronic events

Author: M. Hapke, D. C. Imrie, M. Palazzo, I. J. Bloodworth, Theodoros Geralis, D. Rigby, R. J. Hemingway, A. D. Schaile, A. S. Turcot, U. Müller, H. M. Fischer, Gregor Herten, Ehud Duchovni, S. W. Gensler, S. J. Hillier, S. L. Chu, A. H. Ball, Silvia Arcelli, B. Wilkens, Robert Wayne Springer, A. J. Martin, A. Michelini, D.L. Wagner, P. Jovanovic, G. P. Siroli, J. King, B. C. Shen, T. P. Kokott, A. Luig, P. Igo-Kemenes, M. J. Oreglia, S. Braibant, J. G. Layter, J. E. Pilcher, J.A. Lauber, G. Yekutieli, Peter Krieger, Siegfried Bethke, S. A. Robins, D Chrisman, P.G. Bright-Thomas, Yoram Rozen, J. Schwiening, H. Jeremie, M. Jimack, John Allison, G. A. Beck, W. G. Scott, P. Weber, C. K. Hargrove, M. Hauschild, Stefan Kluth, C. Charlesworth, M. Foucher, Manuella Vincter, K. Stephens, Achim Stahl, H. Mes, E. A. Mckigney, Shlomit Tarem, R. W. L. Jones, S. A. Wotton, A. A. Carter, Gabriella Pasztor, Alessandro Montanari, J. R. Carter, F. Strumia, S. W. O'Neale, W.John McDonald, W. P. Lai, Doug Gingrich, B. Nijjhar, T. R. Wyatt, T. Kress, T. Kobayashi, M. J. Pearce, R. E. Hughes-Jones, R. G. Kellogg, Stefania Xella, C. Markus, S. B. Anderson, D. S. Koetke, G. W. Wilson, Csaba Hajdu, R. Bürgin, B. Fabbro, Ron Folman, Rick J. Van Kooten, K. Ametewee, Stefano Marcellini, G. A. Snow, C. P. Ward, E. H. Vokurka, G. N. Patrick, D. L. Rees, Gideon Alexander, Paolo Capiluppi, D. M. Strom, P R Poffenberger, F. S. Merritt, R. Kowalewski, C. Stegmann, James Letts, Michael Hildreth, B. Schmitt, S. Söldner-Rembold, G. D. Lafferty, C. J. Oram, Robert M Brown, H-C. Schultz-Coulon, N. J. Oldershaw, Daniel Lellouch, S. Komamiya, N. L. Rodning, S. G. Clowes, M. Boutemeur, Otmar Biebel, J. Palinkas, D. Axen, G. Giacomelli, Matthias Schröder, M. Fierro, H. Fukui, A. Jawahery, Takehiko Mori, Shlomo Dado, D. E. Hutchcroft, K. J. Anderson, B. Stockhausen, F. K. Loebinger, B. Poli, C. Dallapiccola, BT Bouwens, G. Duckeck, R. Rylko, P. Vikas, H. Lafoux, J. E.G. Edwards, V. Gibson, Stan Bentvelsen, Gideon Bella, A. P. Wagner, Norbert Wermes, G. Mikenberg, Joleen Pater, Peter Sherwood, P. G. Estabrooks, H. J. Burckhart, G. G. Hanson, Jacqueline Batley, Margret Fincke-Keeler, M. Starks, Dezso Horvath, M. J. Losty, M. F. Turner-Watson, J. Ludwig, K. Runge, P. Bock, R. Giacomelli, R. K. Keeler, M. Morii, A. I. McNab, J. Steuerer, D. R. Ward, P.A. Hart, Peter R Hobson, B. J. King, Jean-Arcady Meyer, P. Utzat, P. M. Watkins, J. Bechtluft, P. Gagnon, P. S. Wells, David E. Plane, E. do Couto e Silva, J. Goldberg, S. J. De Jong, N. K. Watson, S. M. Gascon-Shotkin, T. Omori, Eilam Gross, B. Nellen, T. Hilse, A. T. Watson, F. Palmonari, A. K. Honma, P. Schenk, N. Altekamp, A. Sittler, C. Darling, T. J. Smith, M. G. Rison, Michael Schulz, J. E. Bloomer, A. Joly, P. Szymanski, P. Kyberd, M. J. Kobel, P. Mättig, H. M. Bosch, Sherry Towers, Shoji Asai, T. Kawamoto, N. I. Geddes, M. S. Dixit, D. Hochman, Frans Meijers, R. J. Sobie, A. M. Rossi, G.Marco Dallavalle, O. C. Cooke, D. J. Miller, U. C. Dunwoody, S. Orito, P. Schütz, M. Rosvick, Sven Menke, T. Behnke, Claudio Grandi, R. Howard, M. Tscheulin, J. P. Pansart, Frank Fiedler, H. G. Evans, David G. Charlton, T. W. Pritchard, J.P. Martin, H. Przysiezniak, Richard Nisius, M. Sasaki, R. Bartoldus, E. Lefebvre, Paolo Giacomelli, A. N. Bell, P. W. Jeffreys, M. J. Goodrick, F. Odorici, I. Cohen, Marco Cuffiani, M. Hansroul, Georges Azuelos, A. M. Lee, J. W. Gary, E. Tsur, H. O. Ogren, Robert Lahmann, C. M. Hawkes, Andris Skuja, C. Y. Chang, J. A. McKenna, G. D. Long, U. Jost, R. Mir, Tetsuro Mashimo, J. von Krogh, Christoph Geich-Gimbel, K. W. Bell, W. Gorn, I. P. Duerdoth, P. Fath, James Pinfold, C. H. Shepherd-Themistocleous, D. G. Fong, C. Lewis, J. Gascon, J. J. Ward, Carla Sbarra, J. E. Conboy, J. C. Hill, V. Zacek, P. Taras, A. Malik, Carsten Daniel Burgard, M. A. Thomson, D. Lanske, Marcello Mannelli, R. J. Hawkings, P. Scharff-Hansen, R. J. Homer, A. M. Smith, G. Vasseur, B. Lorazo, L. A. del Pozo, H. Takeda, R. D. Heuer, S. L. Lloyd, F. X. Gentit, F. G. Oakham, T. J. McMahon, E. L. Barberio, E.K.G. Sarkisian, A. Fürtjes, Julie Kirk, R. K. Carnegie, M. Tecchio, J. A. Wilson, C. Hartmann, O. Runolfsson, W. R. Gibson, Lorne Levinson, P. D. Phillips, D. Karlen, B. W. Kennedy, Gilles Beaudoin, O. Schaile, Roger Barlow, Fabrizio Fabbri, C.J. Beeston, T. G. Shears, F. Wäckerle, Gy. Wolf, P. Berlich, D. R. Rust, E. von Törne, Matthew Jones, Eduardo Ros, Reda Tafirout, W. Matthews, A. Skillman, A. Gaidot, T. Wlodek, M. Sproston, P. Routenburg, T. Tsukamoto, N. Tesch, Satoru Yamashita, J. M. Roney, P. E. L. Clarke, W. Mohr, A. Posthaus, F. Scharf, and German Martinez
Subjects: Physics, Quark, Particle physics, Physics and Astronomy (miscellaneous), Forward backward, Particle Physics - Experiment, Mixing (physics), Lepton
Published: 1996

42. J/ $\psi$ and $\psi^\prime$ production in hadronic ${\rm Z}^0$ decays

Author: Gunter Wolf, R. Lahmann, D. C. Imrie, M. Palazzo, I. J. Bloodworth, R. Bartoldus, S. Wotton, H. O. Ogren, Christoph Geich-Gimbel, J. Lauber, P. Poffenberger, E.K.G. Sarkisian, P. S. Wells, David E. Plane, G. P. Siroli, J. King, Frank Fiedler, D. Hochman, Terry Richard Wyatt, M. Hapke, S. Yamashita, P. Igo-Kemenes, Yoram Rozen, J. E. Bloomer, M. Foucher, E. A. Mckigney, D. E. Hutchcroft, Dixit, Matthias Schröder, F. Strumia, Gideon Bella, G.Marco Dallavalle, P. Schütz, T. J. Smith, K. Stephens, C. H. Shepherd-Themistocleous, B. Stockhausen, Paul Kyberd, F. K. Loebinger, P. W. Jeffreys, W.John McDonald, W. P. Lai, D. Chrisman, H. Lafoux, V. Gibson, H. Jeremie, F. X. Gentit, P. Scharff-Hansen, D. R. Ward, T. Kress, M. J. Oreglia, H. J. Burckhart, Jacqueline Batley, D. Karlen, R. E. Hughes-Jones, S. Braibant, Stefan Kluth, Joleen Pater, J. E. Conboy, A. Fürtjes, C. Burgard, Shlomit Tarem, S. B. Anderson, P. Szymanski, Gabriella Pasztor, P. Bright-Thomas, J. M. Roney, S. L. Chu, R. Giacomelli, C. M. Hawkes, A. M. Smith, Daniel Lellouch, Stephen Lloyd, Robert M Brown, C. J. Oram, R. D. Heuer, G. Vasseur, S. M. Gascon-Shotkin, Takehiko Mori, Fabrizio Fabbri, J. J. Ward, P. Vikas, J. R. Carter, Madjid Boutemeur, G. A. Beck, Achim Stahl, G. N. Patrick, Tara Shears, G. A. Snow, C. P. Ward, T. Omori, A. I. McNab, N. J. Oldershaw, C. Hartmann, D. M. Strom, C. Stegmann, B. Lorazo, J. Goldberg, U. C. Dunwoody, D. Lanske, Ehud Duchovni, Otmar Biebel, H. Fukui, E. do Couto e Silva, H. Mes, S. Söldner-Rembold, P. Gagnon, P. A. Hart, Stan Bentvelsen, B. Nellen, R. Rylko, I. P. Duerdoth, V. Zacek, James Pinfold, D. L. Wagner, M. Jimack, D. G. Fong, C. Lewis, P. G. Estabrooks, A. Sittler, M. J. Pearce, A. Joly, R. K. Keeler, P. Fath, F. S. Merritt, F. Wäckerle, Thomson, J. Gascon, S. W. O'Neale, Georges Azuelos, T. Hilse, O. Schaile, D. M. Gingrich, Sven Menke, E. Tsur, S. W. Gensler, K. J. Anderson, P. M. Watkins, Hans-Christian Schultz-Coulon, H. G. Evans, H. M. Bosch, Randall Sobie, A. M. Rossi, M. J. Goodrick, I. Cohen, S. J. Hillier, Michael Schulz, G. D. Lafferty, T. Kobayashi, P. Weber, O. Runolfsson, B. Schmitt, J. Letts, M. Starks, R. Howard, A. Malik, Norbert Wermes, T. Behnke, J. Palinkas, T. Tsukamoto, J. W. Gary, W. R. Gibson, K. W. Bell, John Allison, P. Berlich, U. Müller, J. P. Pansart, T. W. Pritchard, Sherry Towers, Hildreth, T. Kawamoto, J. Steuerer, C. Y. Chang, Shlomo Dado, H. M. Fischer, D. Axen, A. Jawahery, A. Michelini, G. W. Wilson, J. C. Hill, Misao Sasaki, C. Beeston, C. Darling, A. J. Martin, D. S. Koetke, B. T. Bouwens, Claudio Grandi, M. Hauschild, Marcello Mannelli, Guenter Duckeck, M. Rosvick, D. R. Rust, David G. Charlton, C. Markus, B. C. Shen, P. Mättig, R. G. Kellogg, Paolo Giacomelli, Shoji Asai, M. Hansroul, E. Lefebvre, Lorne Levinson, Peter Sherwood, P. Taras, Michael Kobel, Alexander Wagner, Siegfried Bethke, A. S. Turcot, E. H. Vokurka, A. K. Honma, B. Nijjhar, W. G. Scott, S. A. Robins, P. D. Phillips, Andris Skuja, J. Bechtluft, Csaba Hajdu, F. Odorici, Stefano Marcellini, Gilles Beaudoin, C. K. Hargrove, J. Ludwig, G. D. Long, K. Runge, J. A. McKenna, P. Bock, Roger Barlow, A. M. Lee, A. Skillman, R. J. Homer, Richard Nisius, Giora Mikenberg, M. Tecchio, R. Bürgin, E. von Törne, Tetsuro Mashimo, B. Fabbro, Gregor Herten, Marco Cuffiani, Dezso Horvath, M. J. Losty, B. Wilkens, Reda Tafirout, Margret Fincke-Keeler, Jean-Arcady Meyer, S. G. Clowes, Julie Kirk, J. E. Pilcher, M. Fierro, J. E.G. Edwards, N. I. Geddes, W. Gorn, N. L. Rodning, B. Poli, O. C. Cooke, J. von Krogh, R. J. Hawkings, L. A. del Pozo, C. Sbarra, G. Yekutieli, A. A. Carter, Ron Folman, Roger Jones, B. J. King, P. Utzat, M. G. Rison, T. J. McMahon, J. Schwiening, R. K. Carnegie, J. A. Wilson, P. E.L. Clarke, M. K. Jones, J. P. Martin, S. Orito, M. Tscheulin, S. De Jong, U. Jost, R. Mir, Sachio Komamiya, H. Takeda, Theodoros Geralis, F. G. Oakham, E. L. Barberio, E. Ros, A. T. Watson, D. Rigby, R. J. Hemingway, B. W. Kennedy, P. Jovanovic, Austin Ball, Peter Krieger, Manuella Vincter, Alessandro Montanari, Robert Wayne Springer, C. Dallapiccola, T. P. Kokott, A. Luig, N. Altekamp, D. J. Miller, W. Matthews, H. Przysiezniak, E. K. U. Gross, A. Gaidot, T. Wlodek, M. Sproston, N. Tesch, N. K. Watson, W. Mohr, A. Posthaus, M. F. Turner-Watson, M. Morii, Peter R Hobson, D. L. Rees, A. N. Bell, F. Scharf, German Martinez, A. D. Schaile, P. Routenburg, J. G. Layter, C. Charlesworth, Stefania Xella, G. G. Hanson, G. Giacomelli, P. Schenk, R. Kowalewski, Rick J. Van Kooten, Frans Meijers, K. Ametewee, Gideon Alexander, Paolo Capiluppi, and Silvia Arcelli
Subjects: Nuclear physics, Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, High Energy Physics::Experiment, B meson, Production rate, Lepton
Abstract: The production of J/psi mesons in Z(0) decays is studied using 3.6 million hadronic events recorded by the OPAL detector at LEP. The inclusive Z(0) to J/psi and b-quark to J/psi branching ratios are measured from the total yield of J/psi mesons, identified from their decays into lepton pairs. The J/psi momentum distribution is used to study the fragmentation of b-quarks. The production rate of psi' mesons, identified from their decays into a J/psi and a pi(+)pi(-) pair, is measured as well. The following results are obtained:Br(Z(0)-->J/psi X) = (3.9 +/- 0.2 +/- 0.3). 10(-3) and Br(Z(0)-->psi' X) = (1.6 +/- 0.3 +/- 0.2). 10(-3),where the first error is statistical and the second systematic. Finally the J/psi sample is used to reconstruct exclusive b-hadron decays and calculate the corresponding b-hadron branching ratios and masses.
Published: 1996

43. A study of charm hadron production in $$Z^0 \to c\bar c$$ and $$Z^0 \to b\bar b$$ decays at LEPdecays at LEP

Author: S. R. Lautenschlager, H. A. Neal, T. Hilse, O. Runolfsson, C. Dallapiccola, James Pinfold, S. B. Anderson, O. Schaile, P. Szymanski, Michael Hildreth, H. Mes, I. P. Duerdoth, P. Fath, E. Lefebvre, C. Beeston, Claudio Grandi, G. Mikenberg, D. G. Fong, C. Lewis, Daniel Lellouch, Stefan Kluth, Shlomit Tarem, N. Altekamp, N. L. Rodning, Robert McPherson, M. Starks, J. Gascon, F. Odorici, B. Poli, Stan Bentvelsen, D. J. Miller, J. A. McKenna, Takehiko Mori, Silvia Arcelli, F. S. Merritt, Mathieu Doucet, S. M. Gascon-Shotkin, R. W. Springer, R. D. Heuer, Fabrizio Fabbri, U. Müller, M. Hapke, B. Stockhausen, Paul Kyberd, F. K. Loebinger, V. Zacek, A. Malik, A. I. McNab, J. Goldberg, B. Nellen, Shigenori Tanaka, Matthew Evans, A. M. Rossi, U. Jost, R. Mir, Hans-Christian Schultz-Coulon, A. J. Martin, P. Gagnon, P. E.L. Clarke, M. K. Jones, Michael Schulz, T. Tsukamoto, D. R. Rust, D. S. Koetke, H. M. Fischer, Marcello Mannelli, R. W.L. Jones, Gregor Herten, I. J. Bloodworth, J. Allison, Kiyotomo Kawagoe, J. Bechtluft, Dave Charlton, P. Igo-Kemenes, J. P. Martin, J. Steuerer, B. Wilkens, D. E. Hutchcroft, M. Tscheulin, S. De Jong, Guenter Duckeck, H. G. Evans, Achim Stahl, A. Sittler, A. M. Lee, S. A. Robins, Yoram Rozen, M. J. Goodrick, I. Cohen, E. A. Mckigney, M. Foucher, H. Jeremie, C. Hartmann, D. E. Plane, F. G. Oakham, R. E. Hughes-Jones, J. P. Pansart, Shlomo Dado, T. J. Smith, J. E. Pilcher, M. Tecchio, E. von Törne, P. Weber, P. Scharff-Hansen, D. Chrisman, B. Schmitt, E. L. Barberio, Volker Blobel, W. P. Lai, R. Bartoldus, D. Karlen, C. Burgard, G. W. Wilson, M. J. Oreglia, R. Bürgin, H. Przysiezniak, A. N. Bell, J. R. Carter, Georges Azuelos, A. S. Turcot, Stephen Hillier, G. M. Dallavalle, D. Rigby, R. J. Hemingway, H. O. Ogren, Christoph Geich-Gimbel, H. M. Bosch, V. Gibson, E. do Couto e Silva, Joleen Pater, R. J. Barlow, M. Hauschild, M. Fierro, J. E.G. Edwards, Stefan Schmitt, Ekg Sarkisyan, S. A. Wotton, P. W. Jeffreys, K. Stephens, T. Kobayashi, Gideon Bella, C. Markus, A. Rooke, Gunter Wolf, F. X. Gentit, R. Van Kooten, E. Tsur, C. H. Shepherd-Themistocleous, A. M. Smith, H. J. Burckhart, Jacqueline Batley, M. Verzocchi, Paolo Giacomelli, J. G. Layter, P. Poffenberger, R. Giacomelli, M. Hansroul, G. D. Lafferty, K. W. Bell, J. Pálinkás, Madjid Boutemeur, G. Vasseur, B. W. Kennedy, P. Jovanovic, G. T. Jones, E. H. Vokurka, C. Sbarra, P. Schütz, C. Charlesworth, C. K. Hargrove, S. L. Lloyd, J. E. Conboy, A. Fürtjes, R. Lahmann, Andris Skuja, Sven Menke, P. G. Estabrooks, R. K. Keeler, S. Petzold, G. D. Long, T. Omori, G. N. Patrick, Ehud Duchovni, Austin Ball, Peter Krieger, D. Axen, R. J. Homer, A. Jawahery, M. Jimack, Tetsuro Mashimo, P. Mättig, Shoji Asai, A. Gaidot, Matthias Schröder, Otmar Biebel, S. Braibant, Gabriella Pasztor, M. Sasaki, J. C. Hill, C. R. Jones, A. Michelini, J. J. Ward, P. Vikas, F. Wäckerle, D. M. Gingrich, D. C. Imrie, W. J. McDonald, G. P. Siroli, D. M. Strom, P. M. Watkins, G. G. Hanson, Manuella Vincter, Alessandro Montanari, W. R. Gibson, P. Pfeifenschneider, W. Gorn, Peter Sherwood, D. Lanske, P. Berlich, Alexander Wagner, B. C. Shen, G. Giacomelli, B. T. Bouwens, G. A. Snow, C. P. Ward, H. Fukui, J. Ludwig, C. Y. Chang, K. Runge, P. Bock, M. Thiergen, P. Schenk, S. Söldner-Rembold, Siegfried Bethke, J. Lauber, J. Letts, P. Taras, Michael Kobel, A. K. Honma, B. Nijjhar, R. Rylko, R. Kowalewski, M. S. Dixit, Frans Meijers, Norbert Wermes, Sherry Towers, T. Kawamoto, W. G. Scott, A. Joly, K. Ametewee, J. W. Gary, Gideon Alexander, Paolo Capiluppi, R. M. Brown, Lorne Levinson, S. Orito, F. Strumia, S. D. Talbot, M. Rosvick, Julie Kirk, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, S. W. O'Neale, N. I. Geddes, K. J. Anderson, Gilles Beaudoin, G. Yekutieli, A. Skillman, M. F. Turner-Watson, M. Morii, P. S. Wells, Terry Richard Wyatt, A. T. Watson, Peter R Hobson, J. E. Bloomer, P. Routenburg, Sachio Komamiya, Tara Shears, Theodoros Geralis, M. Gruwe, E. Ros, T. P. Kokott, A. Luig, R. J. Sobie, T. R. Junk, R. G. Kellogg, M. Steiert, Csaba Hajdu, Stefano Marcellini, R. Howard, J. S. White, P. A. Hart, Reda Tafirout, Klaus Kurt Desch, M. J. Pearce, D. R. Ward, H. Lafoux, T. Kress, J. Hoare, U. Ruppel, M. R. Ingram, A. A. Carter, Ron Folman, B. J. King, P. Utzat, Frank Fiedler, T. J. McMahon, T. Behnke, R. K. Carnegie, J. A. Wilson, C. M. Hawkes, Richard Nisius, Marco Cuffiani, S. L. Chu, D. Lazic, O. C. Cooke, J. von Krogh, R. J. Hawkings, L. A. del Pozo, D. L. Rees, F. Scharf, German Martinez, A. D. Schaile, W. Matthews, M. A. Thomson, E. K. U. Gross, T. Wlodek, M. Sproston, Satoru Yamashita, N. K. Watson, J. M. Roney, W. Mohr, and A. Posthaus
Subjects: Nuclear physics, Physics, Quark, Partial width, Physics and Astronomy (miscellaneous), High Energy Physics::Phenomenology, Hadron, Decay length, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Measurements of the production of the weakly decaying charmed hadrons: D0, D+, Ds+ andΛc+ in both$Z^0 \to c\bar c$ and$Z^0 \to b\bar b$ events are reported. By summing the partial contributions from each of these states we measure the partial width for Z0 decays into a$c\bar c$ pair as: $$\frac{{\Gamma _{c\bar c} }}{{\Gamma _{had} }} = 0.167 \pm 0.011(stat) \pm 0.011(sys) \pm 0.005(br)$$ where the errors are statistical, systematic and due to the uncertainties in the charmed hadron branching ratios, respectively. The relative production rates for the formation of the charmed hadrons from primaryc quarks is found to be in good agreement with continuum e+e− data at √s≈10 GeV.
Published: 1996

44. Search for a narrow resonance in Z0 decays into hadrons and isolated photons

Author: M. Hapke, Sachio Komamiya, Theodoros Geralis, E. Ros, A. T. Watson, O. C. Cooke, R. Bartoldus, T. P. Kokott, A. Luig, Daniel Lellouch, H. O. Ogren, A. Joly, H. M. Fischer, M. J. Oreglia, Christoph Geich-Gimbel, Takehiko Mori, P. S. Wells, V. Zacek, Koji Yoshimura, P. Weber, J. E. Bloomer, W. J. McDonald, A. Michelini, J. von Krogh, B. C. Shen, Andris Skuja, D. Axen, A. Jawahery, F. X. Gentit, J. E. Conboy, A. Fürtjes, Peter Sherwood, E. Lefebvre, S. Yamashita, P. Igo-Kemenes, I. J. Bloodworth, S. Petzold, G. D. Long, R. J. Hawkings, Alexander Wagner, F. Odorici, P. A. Hart, J. Lauber, H. Jeremie, G. N. Patrick, Silvia Arcelli, J. Ludwig, K. Runge, P. Bock, F. Strumia, Gunter Wolf, P. Gagnon, S. A. Robins, D. L. Rees, Tetsuro Mashimo, R. E. Hughes-Jones, J. Allison, B. Nijjhar, Siegfried Bethke, A. K. Honma, M. J. Pearce, A. Sittler, B. Stockhausen, Paul Kyberd, F. K. Loebinger, L. A. del Pozo, D. E. Hutchcroft, C. Dallapiccola, J. Steuerer, Yoram Rozen, M. F. Turner-Watson, H. M. Bosch, F. Scharf, German Martinez, R. Van Kooten, M. Foucher, E. A. Mckigney, Otmar Biebel, M. Morii, Peter R Hobson, T. J. McMahon, Joleen Pater, V. Gibson, S. L. Chu, J. R. Carter, W. Gorn, W. G. Scott, A. D. Schaile, F. S. Merritt, R. Giacomelli, W. P. Lai, N. Altekamp, W. Matthews, P. Routenburg, R. Howard, J. S. White, N. J. Oldershaw, Junichi Kanzaki, D. Karlen, C. Burgard, E. do Couto e Silva, J. Schwiening, J. P. Pansart, R. K. Carnegie, S. Wotton, M. A. Thomson, Dave Charlton, T. R. Wyatt, A. S. Turcot, D. J. Miller, R. J. Barlow, J. M. Roney, S. M. Gascon-Shotkin, C.J. Beeston, T. G. Shears, U. Müller, H. Mes, J. Bechtluft, R. Lahmann, D. C. Imrie, J. A. McKenna, M. Palazzo, I. P. Duerdoth, A. J. Martin, G. D. Lafferty, A. Gaidot, J. A. Wilson, R. Bürgin, S. G. Clowes, A. I. McNab, Sven Menke, Dezso Horvath, M. J. Losty, Jean-Arcady Meyer, T. Wlodek, D. Chrisman, M. Sproston, P. Fath, J. Goldberg, F. Wäckerle, J. Letts, M. Fierro, J. E.G. Edwards, Ekg Sarkisyan, G. P. Siroli, J. King, O. Schaile, D. M. Gingrich, P. W. Jeffreys, D. M. Strom, D. Rigby, R. J. Hemingway, Madjid Boutemeur, Volker Blobel, T. Behnke, B. Nellen, G. Giacomelli, Norbert Wermes, Eilam Gross, Sherry Towers, T. Kawamoto, P. Scharff-Hansen, C. K. Hargrove, B. W. Kennedy, C. Darling, T. J. Smith, Matthew Evans, M. Starks, P. Berlich, Gideon Bella, N. Tesch, M. Gruwé, P. Jovanovic, S. Orito, C. H. Shepherd-Themistocleous, H. J. Burckhart, M. Rosvick, Jacqueline Batley, Austin Ball, P. Bright-Thomas, A. M. Rossi, Matthias Schröder, P. G. Estabrooks, R. K. Keeler, C. Sbarra, Peter Krieger, P. Mättig, R. W. Springer, H. G. Evans, H. Fukui, R. Rylko, Richard Nisius, M. Thiergen, Stephen Lloyd, J. J. Ward, Manuella Vincter, R. G. Kellogg, Csaba Hajdu, Stefano Marcellini, M. J. Goodrick, I. Cohen, Alessandro Montanari, Hans-Christian Schultz-Coulon, Robert M Brown, Shoji Asai, Marco Cuffiani, T. Omori, P. Vikas, H. Lafoux, D. Lanske, A. M. Smith, G. W. Wilson, G. Vasseur, M. Hauschild, P. M. Watkins, Randall Sobie, Georges Azuelos, E. Tsur, Michael Schulz, C. M. Hawkes, U. Jost, R. Mir, R. D. Heuer, N. K. Watson, Fabrizio Fabbri, B. Lorazo, N. I. Geddes, Michael Hildreth, C. Markus, M. Verzocchi, K. W. Bell, Ehud Duchovni, G. Yekutieli, N. L. Rodning, J. C. Hill, Misao Sasaki, T. Hilse, H. Takeda, D. R. Rust, E. H. Vokurka, O. Runolfsson, M. Jimack, James Pinfold, B. Poli, D. G. Fong, C. Lewis, F. G. Oakham, Stefan Kluth, E. L. Barberio, Shlomit Tarem, J. Gascon, A. M. Lee, A. A. Carter, Ron Folman, F. Palmonari, Roger Jones, M. Tecchio, E. von Törne, W. Mohr, S. W. Gensler, Gregor Herten, A. Posthaus, Claudio Grandi, A. Malik, J. W. Gary, T. Kobayashi, Guenter Duckeck, B. Wilkens, D. S. Koetke, Marcello Mannelli, J. E. Pilcher, P. Utzat, M. G. Rison, R. Kowalewski, K. Ametewee, Gideon Alexander, Paolo Capiluppi, S. B. Anderson, P. Szymanski, Stan Bentvelsen, C. Hartmann, D. E. Plane, Stephen Hillier, G. M. Dallavalle, J. G. Layter, C. Charlesworth, W. R. Gibson, Stefania Xella, B. T. Bouwens, J. Palinkas, Shlomo Dado, G. G. Hanson, Lorne Levinson, Giora Mikenberg, P. D. Phillips, P. Schenk, S. Braibant, Gabriella Pasztor, M. S. Dixit, Frans Meijers, Gilles Beaudoin, G. A. Snow, C. P. Ward, P. E.L. Clarke, M. K. Jones, A. Skillman, S. Söldner-Rembold, Paolo Giacomelli, J. P. Martin, M. Tscheulin, M. Hansroul, S. De Jong, H. Przysiezniak, A. N. Bell, Reda Tafirout, R. J. Homer, Achim Stahl, C. Y. Chang, B. Schmitt, P. Taras, Michael Kobel, Julie Kirk, P. Poffenberger, P. Schütz, S. W. O'Neale, K. J. Anderson, K. Stephens, D. R. Ward, T. Kress, and Frank Fiedler
Subjects: Quark, Physics, Particle physics, Physics and Astronomy (miscellaneous), Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Scalar (mathematics), Bottom quark, Resonance (particle physics), Standard Model, Nuclear physics, Higgs boson, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: A search for the hadronic decay of a hypothetical resonance S0 in the process e+e−→γ + hadrons at Z0 energies is reported. Particular care is taken to optimise the sensitivity to a scalar resonance decaying into bottom quarks, as expected for Higgs production, e+e−→Z0→H0γ with$H^0 \to b\bar b$, in the Standard Model or some of its extensions. No evidence for such a resonance is observed in a sample of about 5 million produced Z0’s. The results are interpreted in terms of models of non-standard Higgs production. An update of a search for a resonance produced in association with hadrons and the subsequent resonance decay into two photons is also presented.
Published: 1996

45. Measurement of the branching ratio

Author: F. S. Merritt, Otmar Biebel, D. L. Wagner, D. E. Hutchcroft, C. Dallapiccola, O. C. Cooke, I. J. Bloodworth, J. Bechtluft, D. M. Strom, C. Stegmann, H. M. Fischer, H. Fukui, R. Rylko, Margret Fincke-Keeler, A. Michelini, D. R. Rust, J. von Krogh, Yoram Rozen, R. W. Springer, R. Lahmann, D. C. Imrie, M. Palazzo, J. Letts, M. Foucher, R. J. Sobie, N. Altekamp, R. Howard, P. E.L. Clarke, Norbert Wermes, Sherry Towers, J. P. Pansart, S. Braibant, Gabriella Pasztor, P. Gagnon, R. J. Hawkings, T. Kawamoto, R. Bartoldus, E. Lefebvre, G. P. Siroli, J. King, P. Igo-Kemenes, M. K. Jones, W. Matthews, A. M. Lee, T. Behnke, J. Steuerer, S. A. Robins, P. S. Wells, J. Allison, D. J. Miller, H. O. Ogren, A. T. Watson, J. P. Martin, S. Orito, L. A. del Pozo, J. E. Bloomer, Joleen Pater, C. Y. Chang, H. Jeremie, M. Tscheulin, M. A. Thomson, M. Rosvick, Christoph Geich-Gimbel, P. Scharff-Hansen, Stefan Kluth, Shlomit Tarem, M. Tecchio, E. von Törne, A. Sittler, C. Burgard, F. Odorici, S. De Jong, Sachio Komamiya, Theodoros Geralis, Georges Azuelos, D Darlen, J. R. Carter, R. E. Hughes-Jones, C. P. Ward, E. K. U. Gross, Gideon Bella, A. Gaidot, T. Wlodek, M. Sproston, C. H. Shepherd-Themistocleous, C. Sbarra, C. J. Oram, E. Ros, W. R. Gibson, S. L. Lloyd, F. X. Gentit, Gregor Herten, P. Taras, E. Tsur, A. Joly, S. Söldner-Rembold, H. M. Bosch, A. S. Turcot, Michael Kobel, M. Hapke, J. E. Conboy, A. Fürtjes, H. J. Burckhart, Jacqueline Batley, K. W. Bell, G. Yekutieli, T. P. Kokott, C. Darling, V. Gibson, A. Luig, N. I. Geddes, J. A. McKenna, B. Wilkens, J. C. Hill, B. T. Bouwens, N. Tesch, H. Przysiezniak, A. M. Smith, Michael Hildreth, Paolo Giacomelli, G.A Show, Gunter Wolf, Silvia Arcelli, Satoru Yamashita, M. Hansroul, W.J. McDonald, D. Rigby, R. J. Hemingway, A. A. Carter, Ron Folman, A. N. Bell, E. do Couto e Silva, U. Müller, T. J. Smith, N. L. Rodning, K. Stephens, G. Vasseur, B. Lorazo, B. Poli, R. M. Brown, D. Axen, Lorne Levinson, A. Jawahery, P. Mättig, Richard Nisius, M. J. Oreglia, S. Wotton, J. E. Pilcher, T. Omori, Shoji Asai, B. W. Kennedy, B. J. King, C. M. Hawkes, P. D. Phillips, Julie Kirk, T. Hilse, O. Schaile, B. C. Shen, Andris Skuja, A. J. Martin, J. Palinkas, Peter Sherwood, Marco Cuffiani, Daniel Lellouch, H. Mes, N. J. Oldershaw, D. L. Rees, Shlomo Dado, I. P. Duerdoth, P. Fath, G. D. Long, R. J. Homer, R. G. Kellogg, P. Utzat, Gilles Beaudoin, A. Skillman, P. Jovanovic, Austin Ball, M. G. Rison, Alexander Wagner, Csaba Hajdu, Peter Krieger, Takehiko Mori, Sven Menke, Siegfried Bethke, Tetsuro Mashimo, J. Ludwig, K. Runge, P. Bock, A. K. Honma, A. I. McNab, J. Goldberg, G. N. Patrick, F. Scharf, S. B. Anderson, B. Nellen, German Martinez, Stefano Marcellini, S. M. Gascon-Shotkin, T. J. McMahon, Manuella Vincter, J. Schwiening, G. G. Hanson, Alessandro Montanari, M. F. Turner-Watson, P. Szymanski, O. Runolfsson, M. Morii, Peter R Hobson, W. G. Scott, R. D. Heuer, G. A. Beck, Achim Stahl, J. Lauber, J. W. Gary, B. Stockhausen, Paul Kyberd, Reda Tafirout, F. K. Loebinger, Fabrizio Fabbri, A. D. Schaile, R. Van Kooten, S. L. Chu, F. Strumia, H. G. Evans, M. J. Goodrick, I. Cohen, N. K. Watson, G. Mikenberg, U. Jost, R. K. Carnegie, R. Mir, J. A. Wilson, P. Poffenberger, Dave Charlton, R. Giacomelli, C. K. Hargrove, P. Routenburg, P. Schütz, W. Gorn, D. R. Ward, T. Kress, P. Weber, Stan Bentvelsen, Dezso Horvath, U. C. Dunwoody, Claudio Grandi, B. Schmitt, J. M. Roney, P. A. Hart, G. Giacomelli, P. Schenk, M. Starks, C.J. Beeston, M. J. Losty, Jean-Arcady Meyer, T. G. Shears, E. A. Mckigney, Abish Malik, Ekg Sarkisyan, P. W. Jeffreys, B. Nijjhar, T. Kobayashi, H. Takeda, C. Hartmann, D. E. Plane, F. Wäckerle, R. Bürgin, B. Fabbro, M. Sasaki, D. M. Gingrich, M. S. Dixit, Frans Meijers, M. J. Pearce, G. M. Dallavalle, W. P. Lai, F. G. Oakham, G. W. Wilson, W. Mohr, P. Berlich, James Pinfold, M. Hauschild, Hans-Christian Schultz-Coulon, A. Posthaus, P. Bright-Thomas, Michael Schulz, E. L. Barberio, A. M. Rossi, D. G. Fong, C. Lewis, J. Gascon, Frank Fiedler, D. Hochman, J. J. Ward, T. Tsukamoto, P. Vikas, D. Lanske, C. Markus, Matthias Schröder, T. W. Pritchard, V. Zacek, H. Lafoux, T. R. Wyatt, D. S. Koetke, G. D. Lafferty, Guenter Duckeck, R. J. Barlow, Marcello Mannelli, R. W.L. Jones, Madjid Boutemeur, S. G. Clowes, M. Fierro, J. E.G. Edwards, J. G. Layter, S. W. O'Neale, E. H. Vokurka, P. G. Estabrooks, R. K. Keeler, P. M. Watkins, C. Charlesworth, K. J. Anderson, Stefania Xella, D. Chrisman, R. Kowalewski, K. Ametewee, Gideon Alexander, Paolo Capiluppi, Ehud Duchovni, M. Jimack, S. W. Gensler, and S. J. Hillier
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Branching fraction, Electron–positron annihilation, Detector, Weak interaction, Charged current, Universality (dynamical systems)
Abstract: The branching ratio of the τ− → e−νeντ decay mode has been measured with the OPAL detector to be (17.78 ± 0.10 ±0.09)% where the first error is statistical and the second is systematic. The branching ratio, together with other measurements, has been used to test e — μ and μ — τ universality in the charged current weak interaction.
Published: 1996

46. Measurement of the average b-baryon lifetime and the product branching ratio {\boldmath {{f({\mathrm{b}} \rightarrow \Lambda_{\mathrm{b}}) \cdot BR(\Lambda_{\mathrm{b}} \rightarrow \Lambda \ell^- \bar{\nu} \mathrm{X})}}}

Author: G. G. Hanson, G. Giacomelli, P. Schenk, Frans Meijers, A. I. McNab, J. Goldberg, J. G. Layter, Dixit, C. Charlesworth, O. C. Cooke, N. K. Watson, S. M. Gascon-Shotkin, P. W. Jeffreys, T. Kobayashi, B. Nellen, P. G. Estabrooks, U. C. Dunwoody, Margret Fincke-Keeler, A. M. Lee, M. Tscheulin, Eduardo Ros, Abish Malik, D. Rigby, R. J. Hemingway, Robert Lahmann, I. P. Duerdoth, J.P. Martin, D. Axen, H. Przysiezniak, P. Fath, C. Hartmann, Otmar Biebel, Gideon Bella, P. M. Watkins, C. Darling, T. J. Smith, R. Bartoldus, H. G. Evans, M. J. Goodrick, I. Cohen, H. J. Burckhart, D.L. Wagner, P. Jovanovic, Peter Krieger, A. Jawahery, A. M. Rossi, H. Deng, A. Stahl, S. B. Anderson, T. Tsukamoto, J. von Krogh, Ehud Duchovni, Jacqueline Batley, P. Igo-Kemenes, J. W. Gary, H. O. Ogren, S. L. Chu, T. Kress, O. Runolfsson, Alan Watson, M. J. Kobel, P. Mättig, J. Ludwig, J. J. Ward, D. Lanske, Doug Gingrich, H. Jeremie, Manuella Vincter, Alessandro Montanari, Shlomo Dado, K. Runge, P. Bock, Christoph Geich-Gimbel, R. J. Hawkings, A. H. Ball, Silvia Arcelli, S. J. De Jong, Shoji Asai, L. A. del Pozo, James Pinfold, R. E. Hughes-Jones, D. E. Hutchcroft, C. Dallapiccola, J. M. Roney, S. W. Gensler, W. R. Gibson, David G. Charlton, E. Lefebvre, H. Mes, H. Fischer, G. Mikenberg, S. W. O'Neale, Georges Azuelos, B. Stockhausen, F. K. Loebinger, J. D. Gillies, D. G. Fong, Daniel Lellouch, T. J. McMahon, S. J. Hillier, Carla Sbarra, S. Komamiya, T. R. Wyatt, Kiyotomo Kawagoe, C. M. Hawkes, A. K. Honma, J.A. Lauber, J. Schwiening, J. Gascon, Takehiko Mori, F. Odorici, V. Gibson, C.J. Beeston, Sherry Towers, G. Duckeck, R. K. Carnegie, A. P. Wagner, K. W. Bell, N. Altekamp, E. A. Mckigney, N. L. Rodning, T. Kawamoto, Frank Fiedler, S. G. Clowes, M. Boutemeur, Stan Bentvelsen, Norbert Wermes, E. do Couto e Silva, J. C. Hill, D. J. Miller, A. Beck, M. Fierro, J. E.G. Edwards, Eugene P. Gross, F. Wäckerle, J. A. McKenna, J. A. Wilson, B. Poli, M. W. Redmond, M. F. Turner-Watson, Peter Sherwood, P. E. L. Clarke, F. X. Gentit, M. Morii, B. C. Shen, Peter R Hobson, W. Mohr, W. P. Lai, V. Zacek, R. Kowalewski, J. E. Conboy, K. J. Anderson, S. Orito, J. C. Clayton, A. Posthaus, D. C. Imrie, A. Fürtjes, Siegfried Bethke, Gy. Wolf, P. Berlich, D. Karlen, P. Gagnon, Thomson, T. Geralis, Rick J. Van Kooten, Sven Menke, P. Szymanski, Stefan Kluth, M. Rosvick, Shlomit Tarem, M. Tecchio, Lorne Levinson, W. G. Scott, P. Weber, R. Giacomelli, T. Hilse, I. J. Bloodworth, G. P. Siroli, J. King, K. Ametewee, P. D. Phillips, O. Schaile, M. Hapke, G. T. Zorn, G. D. Lafferty, Marcello Mannelli, J. E. Duboscq, A. Michelini, Gideon Alexander, Paolo Capiluppi, Hans-Christian Schultz-Coulon, P. Kyberd, C. J. Oram, B. W. Kennedy, Pedro Teixeira-Dias, Robert Wayne Springer, Paolo Giacomelli, H. M. Bosch, M. Hansroul, Gilles Beaudoin, T. P. Kokott, A. Luig, J. Steuerer, Andris Skuja, M. Settles, Michael Schulz, Wolfram Dietrich Zeuner, Roger Barlow, M. J. Losty, Claudio Grandi, F. Palmonari, G. D. Long, F. S. Merritt, Yoram Rozen, Fabrizio Fabbri, S. A. Robins, G. A. Snow, C. P. Ward, Tetsuro Mashimo, Carsten Daniel Burgard, M. Foucher, M. Jimack, John Allison, K. Stephens, T. W. Pritchard, P. Vikas, Matthew Jones, M. J. Oreglia, C. H. Shepherd-Themistocleous, D. R. Rust, G. Yekutieli, F. Scharf, G. W. Wilson, G.Marco Dallavalle, P. Schütz, D. L. Rees, S. Söldner-Rembold, S. Braibant, T. Behnke, J. R. Carter, Junichi Kanzaki, R. J. Homer, Stephen Lloyd, E. von Törne, Robert M Brown, Reda Tafirout, W. Gorn, A. A. Carter, J. Bechtluft, M. Sasaki, Ron Folman, W. Matthews, R. W. L. Jones, Marco Cuffiani, R. G. Kellogg, A. Skillman, G. N. Patrick, C. Y. Chang, A. Gaidot, B. J. King, A. D. Schaile, A. S. Turcot, D. R. Ward, P. Taras, P. Scharff-Hansen, D. S. Koetke, T. Wlodek, M. Sproston, P. Utzat, Marcello Fanti, Julie Kirk, G. A. Beck, P. Routenburg, N. Tesch, R. Bürgin, Stefano Marcellini, B. Fabbro, James Letts, A. M. Smith, G. Vasseur, B. Lorazo, M. G. Rison, A. Joly, N. I. Geddes, D. Hochman, B. Schmitt, Gregor Herten, B. Wilkens, J. E. Pilcher, N. J. Oldershaw, R.J. Akers, M. Starks, M. Hauschild, S. A. Wotton, C. Markus, P. S. Wells, David E. Plane, P R Poffenberger, P.G. Bright-Thomas, A. Buijs, D. M. Strom, C. Stegmann, H. Fukui, Richard Keeler, R. J. Sobie, R. Howard, R. Mir, Matthias Schröder, R. D. Heuer, H. Lafoux, F. G. Oakham, P.A. Hart, J. P. Pansart, U. Müller, A. J. Martin, E. L. Barberio, C. K. Hargrove, Tara Shears, B. Nijjhar, and M. J. Pearce
Subjects: Physics, Baryon, Nuclear physics, Particle physics, Physics and Astronomy (miscellaneous), Branching fraction, Product (mathematics), Electron–positron annihilation, Bibliography, Neutrino, Lambda
Published: 1996

47. Measurement of the average b-baryon lifetime and the product branching ratio $$f(b \to \Lambda _b ) \cdot BR(\Lambda _b \to \Lambda \ell ^ - \bar vX)$$

Author: R. Lahmann, D. C. Imrie, C. Y. Chang, P. Taras, Michael Kobel, G. P. Siroli, J. King, I. J. Bloodworth, O. C. Cooke, S. L. Chu, Stefan Kluth, M. Hapke, D. Axen, A. Jawahery, Shlomit Tarem, J. C. Clayton, M. Settles, Julie Kirk, H. Lafoux, R. Kowalewski, D. E. Hutchcroft, Gideon Bella, C. J. Oram, G. W. Wilson, P. Igo-Kemenes, Yoram Rozen, J. von Krogh, M. Hauschild, H. J. Burckhart, Jacqueline Batley, H. Mes, K. Stephens, M. Foucher, M. J. Oreglia, H. Jeremie, K. Ametewee, C. Markus, R. E. Hughes-Jones, R. J. Hawkings, R. Bartoldus, Peter Sherwood, V. Gibson, Tara Shears, Alexander Wagner, Frank Fiedler, D. Hochman, Gunter Wolf, F. X. Gentit, Gideon Alexander, Paolo Capiluppi, L. A. del Pozo, I. P. Duerdoth, Kiyotomo Kawagoe, P. Fath, Junichi Kanzaki, D. Karlen, H. O. Ogren, Christoph Geich-Gimbel, D. R. Ward, T. Kress, T. J. McMahon, J. Schwiening, P. S. Wells, U. C. Dunwoody, P. A. Hart, J. Ludwig, P. Poffenberger, K. Runge, P. Bock, R. K. Carnegie, C. Burgard, E. do Couto e Silva, N. J. Oldershaw, R.J. Akers, J. R. Carter, Terry Richard Wyatt, G. N. Patrick, J. A. Wilson, M. J. Pearce, Ehud Duchovni, J. Steuerer, P. Schütz, S. Wotton, B. Stockhausen, Paul Kyberd, F. K. Loebinger, Sven Menke, P. Weber, O. Schaile, S. G. Clowes, S. B. Anderson, P. Szymanski, A. Gaidot, P. Scharff-Hansen, M. Fierro, J. E.G. Edwards, Otmar Biebel, D. L. Wagner, R. W. Springer, M. Jimack, J. E. Conboy, A. Fürtjes, Sachio Komamiya, Theodoros Geralis, A. I. McNab, J. Goldberg, H. Deng, S. Braibant, P. W. Jeffreys, M. Starks, E. Ros, A. T. Watson, A. J. Martin, B. Nellen, D. L. Rees, J. Letts, F. Palmonari, Silvia Arcelli, S. W. Gensler, S. J. Hillier, T. Kobayashi, Georges Azuelos, Norbert Wermes, Sherry Towers, R. Giacomelli, F. Scharf, A. M. Smith, T. Kawamoto, F. S. Merritt, C. Darling, P. Bright-Thomas, T. J. Smith, C. Sbarra, Matthias Schröder, G. A. Snow, C. P. Ward, E. Lefebvre, Stan Bentvelsen, G. Vasseur, S. Orito, B. Lorazo, M. Rosvick, Marco Cuffiani, S. W. O'Neale, K. W. Bell, K. J. Anderson, A. D. Schaile, H. G. Evans, M. J. Goodrick, S. Söldner-Rembold, I. Cohen, T. P. Kokott, A. Luig, Andris Skuja, P. Gagnon, A. Buijs, F. Odorici, D. M. Strom, J. C. Hill, Misao Sasaki, G. Yekutieli, Dave Charlton, J. J. Ward, P. Vikas, D. Lanske, P. Mättig, Shoji Asai, B. C. Shen, G. D. Long, Tetsuro Mashimo, Paolo Giacomelli, M. Hansroul, A. A. Carter, C. Stegmann, J. A. McKenna, Gregor Herten, Siegfried Bethke, A. Joly, Ron Folman, Roger Jones, Shlomo Dado, N. K. Watson, Gordon H. Hanson, A. K. Honma, Stephen Lloyd, B. Nijjhar, G. T. Zorn, W. G. Scott, M. Tecchio, C. M. Hawkes, B. Wilkens, G. Giacomelli, A. S. Turcot, B. J. King, H. Fukui, P. Utzat, R. Bürgin, B. Fabbro, M. W. Redmond, M. G. Rison, C. H. Shepherd-Themistocleous, E. A. Mckigney, J. Bechtluft, M. F. Turner-Watson, J. P. Pansart, T. Hilse, M. Morii, W. Gorn, H. M. Bosch, Wolfram Dietrich Zeuner, John Allison, P. Schenk, Peter R Hobson, Giora Mikenberg, Daniel Lellouch, Takehiko Mori, J. E. Pilcher, N. I. Geddes, R. J. Homer, O. Runolfsson, P. Routenburg, U. Müller, M. J. Losty, R. G. Kellogg, W. Mohr, A. Posthaus, W. P. Lai, M. S. Dixit, Stefano Marcellini, N. L. Rodning, C. Beeston, James Pinfold, Claudio Grandi, B. Poli, D. G. Fong, W. Matthews, M. A. Thomson, Frans Meijers, J. Gascon, V. Zacek, G. A. Beck, C. K. Hargrove, E. K. U. Gross, A. Malik, T. Wlodek, R. Howard, Achim Stahl, P. Teixeira-Dias, M. Sproston, J. W. Gary, D. S. Koetke, Marcello Mannelli, J. E. Duboscq, J. M. Roney, T. Tsukamoto, N. Tesch, T. Behnke, S. M. Gascon-Shotkin, J. G. Layter, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, G. D. Lafferty, B. Schmitt, Madjid Boutemeur, C. Charlesworth, Margret Fincke-Keeler, T. W. Pritchard, P. E.L. Clarke, M. K. Jones, J. P. Martin, P. G. Estabrooks, M. Tscheulin, R. K. Keeler, Guenter Duckeck, S. De Jong, A. M. Rossi, H. Przysiezniak, P. M. Watkins, H. M. Fischer, A. Michelini, S. A. Robins, C. Dallapiccola, J. D. Gillies, N. Altekamp, R. J. Barlow, D. J. Miller, R. Mir, J. Lauber, F. G. Oakham, E. L. Barberio, D. Rigby, R. J. Hemingway, B. W. Kennedy, P. Jovanovic, Austin Ball, Peter Krieger, Manuella Vincter, Alessandro Montanari, D. R. Rust, C. Hartmann, D. E. Plane, G. M. Dallavalle, A. M. Lee, E. von Törne, W. R. Gibson, A. Beck, R. Van Kooten, R. M. Brown, Lorne Levinson, P. D. Phillips, Gilles Beaudoin, A. Skillman, F. Wäckerle, Reda Tafirout, D. M. Gingrich, P. Berlich, M. Fanti, R. D. Heuer, and Fabrizio Fabbri
Subjects: Physics, Quark, Particle physics, Muon, Physics and Astronomy (miscellaneous), Branching fraction, High Energy Physics::Phenomenology, Lambda, Baryon, Nuclear physics, High Energy Physics::Experiment, Baryon number, Impact parameter, Nuclear Experiment, Lepton
Abstract: The average lifetime of b-flavoured baryons measured with the OPAL detector is updated to include data collected between 1990 and 1994 at LEP. Bottom-flavoured baryons that decay semileptonically and produce aΛ baryon are identified through the correlation of the baryon number of theΛ and the electric charge of the lepton. To measure the lifetime, the decay point of the b baryon is estimated by theΛ-lepton vertex, and the observed distribution of decay lengths is fitted simultaneously in 874 right-sign and 384 wrong-sign combinations. In a separate method, the impact parameter distribution of the leptons is fitted in a subset of these data. When the two results are combined, taking correlations into account, the average b-baryon lifetime is found to be τ=1.16±0.11(stat.)±0.06(syst.) ps. Using the same data, the product branching ratio is measured to be$\begin{gathered} \hfill f(b \to \Lambda _b ) \cdot BR(\Lambda _b \to \Lambda \ell ^ - \bar vX) = (2.91 \pm 0.23(stat.) \\ \hfill \pm 0.25(stat.)) \cdot 10^{ - 3} \\ \end{gathered} $, where the symbolf(b→Λb) is the fraction of b quarks from Z0 decays forming b baryons,Λb represents all b-flavoured baryons and l is either an electron or a muon.
Published: 1995

48. Measurement of the τ−→h − h + h − v τ and τ−→h − h + h −≥1π0 v τ branching ratios

Author: Madjid Boutemeur, G. D. Long, Tetsuro Mashimo, P. G. Estabrooks, R. K. Keeler, W. Gorn, P. M. Watkins, R. Bartoldus, Otmar Biebel, D. L. Wagner, H. O. Ogren, C. Y. Chang, S. Braibant, Christoph Geich-Gimbel, H. Deng, G. G. Hanson, P. Taras, G. Giacomelli, W. R. Gibson, G. A. Snow, C. P. Ward, N. J. Oldershaw, F. X. Gentit, J. E. Conboy, J. Letts, P. Schenk, Michael Kobel, A. Beck, S. Söldner-Rembold, Norbert Wermes, A. Fürtjes, R.J. Akers, R. Kowalewski, Sherry Towers, M. S. Dixit, T. Kawamoto, G. A. Beck, R. M. Brown, Lorne Levinson, Frans Meijers, Achim Stahl, P. Teixeira-Dias, P. D. Phillips, P. E.L. Clarke, M. K. Jones, Gilles Beaudoin, P. Igo-Kemenes, Julie Kirk, H. Lafoux, A. Skillman, S. Orito, M. Rosvick, F. Palmonari, O. Schaile, K. Ametewee, R. G. Kellogg, Silvia Arcelli, J. P. Martin, M. Tscheulin, B. Schmitt, S. De Jong, H. Jeremie, N. K. Watson, R. Lahmann, D. C. Imrie, Matthias Schröder, Gideon Alexander, Paolo Capiluppi, R. E. Hughes-Jones, Reda Tafirout, M. Fanti, J. Steuerer, H. Przysiezniak, V. Gibson, E. A. Mckigney, O. C. Cooke, Margret Fincke-Keeler, F. S. Merritt, M. Hapke, M. Starks, G. P. Siroli, J. King, D. E. Hutchcroft, C. Dallapiccola, P. Scharff-Hansen, Sachio Komamiya, W. P. Lai, Theodoros Geralis, E. Ros, A. T. Watson, E. do Couto e Silva, S. Marcllini, J. D. Gillies, W. Mohr, A. Posthaus, Dave Charlton, J. Bechtluft, J. A. McKenna, Shlomo Dado, J. von Krogh, R. J. Hawkings, Ehud Duchovni, A. M. Smith, G. Vasseur, R. Howard, C. Hartmann, D. E. Plane, N. Altekamp, B. Lorazo, James Pinfold, D. G. Fong, P. Poffenberger, T. J. Smith, K. Stephens, P. Schütz, L. A. del Pozo, B. C. Shen, R. Bürgin, B. Fabbro, G. M. Dallavalle, G. W. Wilson, M. Hauschild, J. G. Layter, Sven Menke, H. Mes, M. J. Oreglia, J. P. Pansart, Giora Mikenberg, J. Gascon, T. P. Kokott, A. Luig, T. J. McMahon, D. J. Miller, C. Markus, D. L. Rees, C. Charlesworth, A. Malik, G. N. Patrick, U. Müller, A. J. Martin, J. Schwiening, I. P. Duerdoth, R. K. Carnegie, D. Axen, J. W. Gary, Paolo Giacomelli, R. D. Heuer, A. Jawahery, Fabrizio Fabbri, D. S. Koetke, F. Scharf, M. Hansroul, M. Jimack, J. A. Wilson, Marcello Mannelli, J. E. Duboscq, S. W. Gensler, P. Fath, Siegfried Bethke, A. K. Honma, A. D. Schaile, Kiyotomo Kawagoe, Gideon Bella, Marco Cuffiani, S. J. Hillier, Peter Sherwood, A. Buijs, T. Kobayashi, H. J. Burckhart, Alexander Wagner, Jacqueline Batley, W. Matthews, C. Sbarra, D. M. Strom, C. Stegmann, T. R. Wyatt, M. A. Thomson, J. Ludwig, K. Runge, D. R. Rust, C. H. Shepherd-Themistocleous, P. Bock, G. Yekutieli, C. K. Hargrove, H. Fukui, E. K. U. Gross, P. Weber, W. G. Scott, A. Gaidot, T. Wlodek, M. F. Turner-Watson, A. A. Carter, M. Sproston, Ron Folman, Roger Jones, P. Gagnon, U. C. Dunwoody, P. A. Hart, J. Allison, D. R. Ward, T. Kress, Gregor Herten, B. J. King, R. J. Barlow, M. Morii, P. Utzat, B. Nijjhar, S. L. Chu, R. J. Homer, Peter R Hobson, N. Tesch, G. T. Zorn, M. J. Pearce, A. M. Lee, R. Mir, M. G. Rison, B. Wilkens, S. W. O'Neale, K. J. Anderson, E. Lefebvre, E. von Törne, H. M. Bosch, S. G. Clowes, Wolfram Dietrich Zeuner, P. Routenburg, J. E. Pilcher, M. Fierro, J. E.G. Edwards, F. Odorici, Frank Fiedler, D. Hochman, P. W. Jeffreys, R. Van Kooten, P. S. Wells, J. C. Clayton, Stephen Lloyd, T. Behnke, C.J. Beeston, T. G. Shears, M. Tecchio, F. Wäckerle, J. Lauber, D. M. Gingrich, P. Berlich, P. Bright-Thomas, J. J. Ward, P. Vikas, D. Lanske, F. G. Oakham, M. J. Losty, E. L. Barberio, T. Hilse, O. Runolfsson, D. Rigby, R. J. Hemingway, B. W. Kennedy, P. Jovanovic, Claudio Grandi, Austin Ball, Peter Krieger, R. W. Springer, Manuella Vincter, Alessandro Montanari, Georges Azuelos, K. W. Bell, J. C. Hill, Misao Sasaki, J. M. Roney, G. D. Lafferty, A. Joly, M. W. Redmond, B. Stockhausen, Paul Kyberd, F. K. Loebinger, R. Giacomelli, A. I. McNab, J. Goldberg, S. M. Gascon-Shotkin, B. Nellen, H. G. Evans, M. J. Goodrick, I. Cohen, A. M. Rossi, T. Tsukamoto, Stefan Kluth, H. M. Fischer, Shlomit Tarem, A. Michelini, C. J. Oram, Gunter Wolf, S. A. Robins, S. Wotton, J. R. Carter, N. I. Geddes, N. L. Rodning, B. Poli, I. J. Bloodworth, M. Settles, Yoram Rozen, M. Foucher, Junichi Kanzaki, D. Karlen, C. Burgard, C. M. Hawkes, Daniel Lellouch, A. S. Turcot, Takehiko Mori, V. Zacek, C. Darling, P. Mättig, Shoji Asai, S. B. Anderson, P. Szymanski, Stan Bentvelsen, Hans-Christian Schultz-Coulon, Randall Sobie, Michael Schulz, T. W. Pritchard, Guenter Duckeck, and Andris Skuja
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, Branching fraction, Electron–positron annihilation, Analytical chemistry, Branching (polymer chemistry), Engineering (miscellaneous), Charged particle, Lepton
Abstract: The branching ratios of the τ−→h − h + h − v τ and τ−→h − h + h −≥1π0 v τ decays, whereh is either a charged π orK meson, are measured using a data sample of 87861 τ+τ− pairs collected with the OPAL detector at LEP. The two branching ratios are extracted simultaneously from a sample of three charged particle decays and found to be: $$\begin{gathered} B(\tau ^ - \to h^ - h^ + h^ - \nu _\tau ) = (9.87 \pm 0.10 \pm 0.24)\% \hfill \\ B(\tau ^ - \to h^ - h^ + h^ - \geqslant 1\pi ^0 \nu _\tau ) = (5.09 \pm 0.10 \pm 0.23)\% \hfill \\ \end{gathered}$$ where the first error is statistical and the second systematic. The branching ratio of the τ lepton into three charged particles is measured to be: $$B(\tau ^ - \to 3 - prong) = (14.96 \pm 0.09 \pm 0.22)\%$$
Published: 1995

49. A study of QCD structure constants and a measurement of $$\alpha _s (M_{Z^0 } )$$ at LEP using event shape observables

Author: S. Braibant, H. M. Fischer, T. J. McMahon, Otmar Biebel, A. Michelini, D. L. Wagner, Gunter Wolf, F. X. Gentit, G. A. Snow, C. P. Ward, H. Deng, S. Söldner-Rembold, Reda Tafirout, S. A. Robins, P. E.L. Clarke, R. Kowalewski, J. Schwiening, M. K. Jones, G. W. Wilson, J. Letts, Frank Fiedler, D. Hochman, M. Hauschild, R. Lahmann, D. C. Imrie, J. P. Martin, E. Lefebvre, Norbert Wermes, Sherry Towers, C. Markus, R. K. Carnegie, Andris Skuja, M. Tscheulin, S. De Jong, N. J. Oldershaw, J. A. Wilson, R.J. Akers, O. Schaile, T. Kawamoto, Paolo Giacomelli, C. M. Hawkes, M. Starks, K. Ametewee, K. Stephens, F. Odorici, Daniel Lellouch, Madjid Boutemeur, M. Hansroul, S. Wotton, Matthias Schröder, Takehiko Mori, Shlomo Dado, Gideon Alexander, Paolo Capiluppi, G. P. Siroli, J. King, M. Fanti, W. R. Gibson, S. Orito, M. Rosvick, G. D. Long, Tetsuro Mashimo, P. G. Estabrooks, R. K. Keeler, V. Gibson, H. Przysiezniak, C. H. Shepherd-Themistocleous, V. Zacek, R. J. Homer, J. Steuerer, A. Beck, Gregor Herten, B. Wilkens, Lorne Levinson, J. P. Pansart, M. Hapke, R. W. Springer, J. E. Pilcher, R. Bartoldus, C. Dallapiccola, Eilam Gross, C. Sbarra, Margret Fincke-Keeler, P. M. Watkins, J. D. Gillies, P. D. Phillips, Gilles Beaudoin, Giora Mikenberg, A. Skillman, T. Hilse, D. E. Hutchcroft, W. Gorn, Hans-Christian Schultz-Coulon, D. R. Ward, T. Kress, A. M. Rossi, N. K. Watson, O. Runolfsson, Ehud Duchovni, M. Jimack, P. S. Wells, G. Yekutieli, Randall Sobie, Michael Schulz, G. D. Lafferty, R. D. Heuer, U. Müller, C. Hartmann, D. E. Plane, A. I. McNab, P. Igo-Kemenes, Georges Azuelos, M. J. Oreglia, T. Tsukamoto, Fabrizio Fabbri, G. G. Hanson, A. J. Martin, H. O. Ogren, F. Palmonari, J. C. Clayton, Silvia Arcelli, D. Axen, Christoph Geich-Gimbel, S. W. Gensler, S. J. Hillier, C. Darling, T. J. Smith, Terry Richard Wyatt, A. A. Carter, Ron Folman, T. Kobayashi, N. Altekamp, R. Van Kooten, Roger Jones, Kiyotomo Kawagoe, G. M. Dallavalle, T. W. Pritchard, J. Goldberg, K. W. Bell, H. Mes, C. Beeston, R. J. Barlow, H. Jeremie, J. R. Carter, G. N. Patrick, J. C. Hill, P. Scharff-Hansen, P. Schenk, N. I. Geddes, Claudio Grandi, Misao Sasaki, A. Jawahery, Marco Cuffiani, B. Stockhausen, Paul Kyberd, F. K. Loebinger, P. W. Jeffreys, P. Mättig, Shoji Asai, I. P. Duerdoth, P. Fath, Dave Charlton, Sachio Komamiya, Theodoros Geralis, Guenter Duckeck, B. Nellen, B. C. Shen, D. J. Miller, S. W. O'Neale, R. E. Hughes-Jones, N. L. Rodning, E. Ros, A. T. Watson, M. S. Dixit, W. Mohr, Siegfried Bethke, A. K. Honma, B. Nijjhar, A. M. Smith, Frans Meijers, W. G. Scott, F. Wäckerle, B. Poli, E. A. Mckigney, D. M. Gingrich, K. J. Anderson, J. E. Conboy, S. L. Chu, A. Fürtjes, A. Posthaus, B. J. King, P. Utzat, M. G. Rison, A. Buijs, C. K. Hargrove, G. A. Beck, P. Weber, Achim Stahl, P. Teixeira-Dias, T. P. Kokott, A. Luig, Peter Sherwood, G. Vasseur, B. Lorazo, Tara Shears, E. do Couto e Silva, W. P. Lai, Alexander Wagner, P. Berlich, D. M. Strom, R. Bürgin, B. Fabbro, C. Stegmann, I. J. Bloodworth, Stephen Lloyd, W. Matthews, P. Bright-Thomas, F. S. Merritt, J. Ludwig, G. Giacomelli, O. C. Cooke, A. S. Turcot, H. Fukui, P. Poffenberger, U. C. Dunwoody, H. G. Evans, B. Schmitt, M. A. Thomson, M. J. Goodrick, James Pinfold, P. A. Hart, Sven Menke, D. G. Fong, J. Gascon, M. J. Losty, D. R. Rust, D. Rigby, R. J. Hemingway, M. Tecchio, Robert M Brown, J. M. Roney, J. J. Ward, P. Vikas, Gideon Bella, K. Runge, P. Bock, H. J. Burckhart, J. G. Layter, Jacqueline Batley, M. Settles, Yoram Rozen, M. Foucher, P. Schütz, R. Giacomelli, I. Cohen, M. J. Pearce, D. Lanske, A. M. Lee, A. Malik, J. W. Gary, D. S. Koetke, C. Charlesworth, B. W. Kennedy, P. Jovanovic, J. Bechtluft, J. A. McKenna, Austin Ball, E. von Törne, J. von Krogh, A. Gaidot, T. Wlodek, Marcello Mannelli, J. E. Duboscq, M. Sproston, Peter Krieger, Manuella Vincter, R. J. Hawkings, L. A. del Pozo, C. Y. Chang, D. Karlen, C. Burgard, Alessandro Montanari, P. Taras, R. Mir, R. Howard, N. Tesch, T. Behnke, S. B. Anderson, Stefan Kluth, Shlomit Tarem, P. Szymanski, Michael Kobel, J. Lauber, P. Gagnon, C. J. Oram, Julie Kirk, H. Lafoux, S. G. Clowes, D. L. Rees, Stan Bentvelsen, M. Fierro, J. E.G. Edwards, F. Scharf, F. G. Oakham, G. T. Zorn, A. D. Schaile, E. L. Barberio, H. M. Bosch, Wolfram Dietrich Zeuner, A. Joly, M. F. Turner-Watson, M. Morii, M. W. Redmond, Peter R Hobson, P. Routenburg, John Allison, R. G. Kellogg, and Stefano Marcellini
Subjects: Quantum chromodynamics, Quark, Physics, Particle physics, Structure constants, Physics and Astronomy (miscellaneous), High Energy Physics::Lattice, High Energy Physics::Phenomenology, Observable, Jet (particle physics), Nuclear physics, Strong coupling, High Energy Physics::Experiment, Constant (mathematics), Engineering (miscellaneous), Event (particle physics), Particle Physics - Experiment
Abstract: The dependence of event shape cross sections on the QCD structure constantsCA,CF andTF is studied using data from the OPAL detector at LEP. The observables Thrust, Heavy Jet Mass, Total and Wide Jet Broadening are used. They allow the use ofO(αs2), resummed NLLA, and combinedO(αs2) plus resummed NLLA QCD calculations so that a comparison between the different approaches can be performed. The measured values of the structure constants are found to be consistent with standard QCD based on SU(3) and five active quark flavours. A measurement of the strong coupling constant using NLLA QCD calculations alone results in$\alpha _s (M_{Z^0 } ) = 0.113_{ - 0.008}^{ + 0.009}$, which complements our previous determinations.
Published: 1995

50. A study of b quark fragmentation into B0 and B+ mesons at LEP

Author: Theodoros Geralis, E. Ros, S. M. Gascon-Shotkin, J. Palinkas, T. P. Kokott, A. Luig, D. Rigby, R. J. Hemingway, H. Mes, I. P. Duerdoth, Shlomo Dado, P. Fath, A. M. Rossi, F. Wäckerle, B. W. Kennedy, D. M. Gingrich, P. Jovanovic, T. Behnke, J. Steuerer, Austin Ball, Peter Krieger, P. Berlich, Manuella Vincter, Alessandro Montanari, P. W. Jeffreys, M. F. Turner-Watson, M. Morii, Peter R Hobson, P. Routenburg, Giora Mikenberg, U. Jost, R. Mir, Reda Tafirout, Madjid Boutemeur, P. Igo-Kemenes, B. C. Shen, D. Axen, I. J. Bloodworth, J. C. Clayton, P. Bright-Thomas, Dave Charlton, P. Poffenberger, H. Jeremie, P. G. Estabrooks, A. Jawahery, Marco Cuffiani, M. Settles, Siegfried Bethke, A. K. Honma, B. Nijjhar, J. J. Ward, W. Matthews, W. G. Scott, R. E. Hughes-Jones, Yoram Rozen, F. G. Oakham, P. Vikas, D. Lanske, T. J. McMahon, P. Schütz, Ehud Duchovni, M. A. Thomson, Peter Sherwood, E. L. Barberio, M. Foucher, Alexander Wagner, Paolo Giacomelli, P. M. Watkins, S. L. Chu, R. Bürgin, B. Fabbro, M. Hansroul, E. K. U. Gross, C. Dallapiccola, M. Jimack, A. Gaidot, W. R. Gibson, J. Ludwig, S. Braibant, E. Lefebvre, N. J. Oldershaw, Richard Keeler, K. Runge, P. Bock, J. D. Gillies, T. Wlodek, Junichi Kanzaki, T. Hilse, M. Sproston, D. Karlen, J. Schwiening, R. K. Carnegie, E. do Couto e Silva, N. I. Geddes, S. W. Gensler, F. S. Merrtt, R. D. Heuer, Dezso Horvath, Fabrizio Fabbri, C. Burgard, F. Odorici, O. Runolfsson, M. J. Losty, A. Beck, S. J. Hillier, P. Gagnon, N. Altekamp, J. A. Wilson, A. I. McNab, John Allison, R. Howard, Jean-Arcady Meyer, C. H. Shepherd-Themistocleous, T. Kobayashi, N. L. Rodning, Gideon Bella, R. J. Barlow, D. J. Miller, C. Beeston, Sven Menke, J. Goldberg, B. Poli, A. Sittler, Claudio Grandi, D. R. Rust, J. P. Pansart, R. J. Homer, O. Schaile, R. W. Springer, R. G. Kellogg, Silvia Arcelli, B. Nellen, G. A. Snow, C. P. Ward, S. Söldner-Rembold, H. J. Burckhart, Jacqueline Batley, T. Tsukamoto, N. Tesch, N. K. Watson, H. M. Fischer, M. Starks, A. J. Martin, H. M. Bosch, Lorne Levinson, P. D. Phillips, Gilles Beaudoin, A. Skillman, G. A. Beck, C. Darling, T. J. Smith, Achim Stahl, A. M. Lee, Csaba Hajdu, Stefano Marcellini, E. A. Mckigney, A. Michelini, P. S. Wells, M. Tecchio, E. von Törne, S. W. O'Neale, O. C. Cooke, G. W. Wilson, K. J. Anderson, M. Hauschild, Georges Azuelos, P. Mättig, Stephen Lloyd, E. Tsur, J. Lauber, Terry Richard Wyatt, W. P. Lai, Frank Fiedler, D. Hochman, S. G. Clowes, M. Fierro, Shoji Asai, B. Schmitt, S. A. Robins, Robert M Brown, C. Markus, K. W. Bell, J. E.G. Edwards, C. Hartmann, D. E. Plane, K. Stephens, J. Bechtluft, J. A. McKenna, C. Y. Chang, Misao Sasaki, C. M. Hawkes, Margret Fincke-Keeler, Daniel Lellouch, A. Joly, R. Kowalewski, J. M. Roney, W. Mohr, G. M. Dallavalle, P. Taras, A. Posthaus, J. von Krogh, F. Strumia, Michael Kobel, Takehiko Mori, E. H. Vokurka, K. Ametewee, R. J. Hawkings, V. Gibson, H. G. Evans, Gideon Alexander, Paolo Capiluppi, B. Stockhausen, Paul Kyberd, V. Zacek, F. K. Loebinger, L. A. del Pozo, C. Sbarra, Alan Watson, R. Bartoldus, D. M. Strom, M. J. Goodrick, C. Stegmann, Julie Kirk, H. Fukui, Joleen Pater, I. Cohen, D. L. Rees, D. R. Ward, T. Kress, R. Rylko, H. O. Ogren, Christoph Geich-Gimbel, G. Yekutieli, F. Scharf, R. Giacomelli, German Martinez, Gregor Herten, B. Wilkens, A. D. Schaile, A. A. Carter, Ron Folman, Roger Jones, B. J. King, P. Utzat, M. G. Rison, F. X. Gentit, J. E. Conboy, A. Fürtjes, Gunter Wolf, J. E. Pilcher, S. Wotton, Stefan Kluth, Shlomit Tarem, Tara Shears, U. C. Dunwoody, C. J. Oram, P. A. Hart, M. J. Pearce, U. Müller, Otmar Biebel, C. K. Hargrove, Matthias Schröder, D. L. Wagner, H. Lafoux, H. Deng, J. Letts, Norbert Wermes, Sherry Towers, T. Kawamoto, S. Orito, M. Rosvick, M. Hapke, D. E. Hutchcroft, M. J. Oreglia, J. R. Carter, G. N. Patrick, S. B. Anderson, P. Szymanski, Stan Bentvelsen, Andris Skuja, G. D. Long, Tetsuro Mashimo, W. Gorn, A. S. Turcot, P. Scharff-Hansen, A. M. Smith, G. Vasseur, B. Lorazo, Hans-Christian Schultz-Coulon, James Pinfold, Randall Sobie, Michael Schulz, G. D. Lafferty, D. G. Fong, C. Lewis, J. Gascon, T. W. Pritchard, A. Malik, J. W. Gary, Guenter Duckeck, D. S. Koetke, Marcello Mannelli, G. G. Hanson, G. Giacomelli, P. Schenk, M. S. Dixit, Frans Meijers, J. G. Layter, R. Lahmann, C. Charlesworth, D. C. Imrie, M. Palazzo, Stefania Xella, P. E.L. Clarke, M. K. Jones, G. P. Siroli, J. P. Martin, M. Tscheulin, John Hill, S. De Jong, J. King, H. Przysiezniak, Kiyotomo Kawagoe, P. Weber, R. Van Kooten, and Sachio Komamiya
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Bottom quark, Nuclear physics, Fragmentation (mass spectrometry), Mass spectrum, High Energy Physics::Experiment, B meson, Nuclear Experiment, Particle Physics - Experiment, Free parameter
Abstract: A study of b quark fragmentation at LEP is presented using a sample of semileptonic B decays containing a fully reconstructed charm meson. The data are compared to several theoretical models for heavy quark fragmentation; the free parameters in these models are fitted and the sensitivity of the model parameters to the rate of P-wave B meson production is studied. The mean scaled energy fraction of B 0 and B + mesons has been determined to be x E > = 0.695 ± 0.006 ± 0.003 ± 0.007, where the errors are statistical, systematic and model dependence respectively. This result is consistent with previous, less direct measurements from inclusive leptonic B decays. Also presented is a model independent fit to the shape of the energy distribution of weakly decaying B mesons at LEP.
Published: 1995

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