We report on properties of hadronic events from e+e− annihilation observed by the ALEPH detector at the large Electron Positron Collider at CERN. The center-of-mass energy was View the MathML source. Measured distributions of the global event-shape variables sphericity, aplanarity, thrust and minor value, and of the inclusive variables xp, p⊥in, p⊥out and y are presented. We measure a mean charged multiplicity in hadronic events of 〈Nch〉=21.3±0.1 (statistical)±0.6 (systematic). The data are in good agreement with QCD-based models which use the leading-logarithm approximation, and are less well described by a model using O(αs2) QCD.
Properties of hadronic events in e+e− annihilation at square-root-s=91 GeV / D. Decamp, B. Deschizeaux, J. Lees, M. Minard, J. Crespo, M. Delfino, E. Fernandez, M. Martinez, R. Miquel, M. Mir, S. Orteu, A. Pacheco, J. Perlas, E. Tubau, M. Catanesi, M. De Palma, A. Farilla, G. Iaselli, G. Maggi, A. Mastrogiacomo, S. Natali, S. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Chen, H. Hu, D. Huang, J. Lin, T. Ruan, T. Wang, W. Wu, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, H. Albrecht, F. Bird, E. Blucher, T. Charity, H. Drevermann, L. Garrido, C. Grab, R. Hagelberg, S. Haywood, B. Jost, M. Kasemann, G. Kellner, J. Knobloch, A. Lacourt, I. Lehraus, T. Lohse, D. Luke, A. Marchioro, P. Mato, J. May, V. Mertens, A. Minten, A. Miotto, P. Palazzi, M. Pepe Altarelli, F. Ranjard, J. Richstein, A. Roth, J. Rothberg, H. Rotscheidt, W. Vonruden, R. Denis, D. Schlatter, M. Takashima, M. Talby, H. Taureg, W. Tejessy, H. Wachsmuth, S. Wheeler, W. Wiedenmann, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadinotwinowska, A. Falvard, P. Gay, P. Henrard, J. Jousset, B. Michel, J. Montret, D. Pallin, P. Perret, J. Prat, J. Proriol, F. Prulhiere, H. Bertelsen, F. Hansen, J. Hansen, J. Hansen, P. Hansen, A. Lindahl, B. Madsen, R. Mollerud, B. Nilsson, G. Petersen, E. Simopoulou, A. Vayaki, J. Badier, D. Bernard, A. Blondel, G. Bonneaud, J. Bourotte, F. Braems, J. Brient, M. Ciocci, R. Guirlet, P. Mine, A. Rouge, H. Videau, I. Videau, D. Zwierski, D. Candlin, A. Conti, G. Parrini, M. Corden, C. Georgiopoulos, J. Goldman, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, V. Chiarella, G. Deninno, B. D’Ettorre Piazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. Murtas, G. Nicoletti, P. Picchi, P. Zografou, B. Altoon, O. Boyle, A. Flavell, A. Halley, I. Tenhave, J. Hearns, I. Hughes, J. Lynch, D. Martin, R. Oneill, C. Raine, J. Scarr, K. Smith, A. Thompson, B. Brandl, O. Braun, R. Geiges, C. Geweniger, P. Hanke, V. Hepp, E. Kluge, Y. Maumary, M. Panter, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, G. Barber, A. Belk, R. Beuselinck, D. Binnie, W. Cameron, M. Cattaneo, P. Dornan, S. Dugeay, R. Forty, D. Gentry, J. Hassard, D. Miller, D. Price, J. Sedgbeer, G. Taylor, I. Tomalin, P. Girtler, D. Kuhn, G. Rudolph, T. Brodbeck, C. Bowdery, A. Finch, F. Foster, G. Hughes, N. Keemer, M. Nuttall, B. Rowlingson, T. Sloan, S. Snow, T. Barczewski, L. Bauerdick, K. Kleinknecht, D. Pollmann, B. Renk, S. Roehn, H. Sander, M. Schmelling, F. Steeg, J. Albanese, J. Aubert, C. Benchouk, A. Bonissent, F. Etienne, R. Nacasch, P. Payre, B. Pietrzyk, Z. Qian, W. Blum, P. Cattaneo, M. Comin, G. Cowan, B. Dehning, H. Dietl, M. Fernandezbosman, D. Hauff, A. Jahn, E. Lange, G. Lutjens, G. Lutz, W. Manner, H. Moser, Y. Pan, R. Richter, A. Schwarz, R. Settles, U. Stiegler, U. Stierlin, G. Stimpfl, J. Thomas, G. Waltermann, G. Debouard, J. Boucrot, O. Callot, A. Cordier, M. Davier, G. Ganis, J. Grivaz, P. Heusse, P. Janot, V. Journe, D. Kim, J. Lefrancois, D. Lloydowen, A. Lutz, P. Marotte, J. Veillet, S. Amendolia, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bradaschia, I. Ferrante, F. Fidecaro, L. Foa, E. Focardi, F. Forti, A. Giassi, M. Giorgi, F. Ligabue, A. Lusiani, E. Mannelli, P. Marrocchesi, A. Messineo, F. Palla, G. Sanguinetti, S. Scapellato, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, J. Carter, B. Green, M. Green, A. Mckemey, P. March, T. Medcalf, M. Saich, J. Strong, R. Thomas, T. Wildish, D. Botterill, R. Clifft, T. Edgecock, M. Edwards, S. Fisher, J. Harvey, D. Hill, T. Jones, M. Morrissey, P. Norton, D. Salmon, J. Thompson, B. Blochdevaux, P. Colas, C. Klopfenstein, E. Lancon, E. Locci, S. Loucatos, L. Mirabito, E. Monnier, P. Perez, F. Perrier, J. Rander, J. Renardy, A. Roussarie, J. Schuller, J. Ashman, C. Booth, F. Combley, M. Dinsdale, J. Martin, D. Parker, L. Thompson, S. Brandt, H. Burkhardt, C. Grupen, H. Meinhard, E. Neugebauer, U. Schafer, H. Seywerd, K. Stupperich, B. Gobbo, F. Liello, E. Milotti, F. Ragusa, L. Rolandi, L. Bellantoni, J. Boudreau, D. Cinabro, J. Conway, D. Cowen, Z. Feng, J. Harton, J. Hilgart, R. Jared, R. Johnson, B. Leclaire, Y. Pan, T. Parker, J. Pater, Y. Saadi, V. Sharma, J. Wear, F. Weber, S. Wu, S. Xue, G. Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 234:1/2(1990), pp. 209-218. [10.1016/0370-2693(90)92030-M]
Properties of hadronic events in e+e− annihilation at square-root-s=91 GeV
F. Ragusa;
1990
Abstract
We report on properties of hadronic events from e+e− annihilation observed by the ALEPH detector at the large Electron Positron Collider at CERN. The center-of-mass energy was View the MathML source. Measured distributions of the global event-shape variables sphericity, aplanarity, thrust and minor value, and of the inclusive variables xp, p⊥in, p⊥out and y are presented. We measure a mean charged multiplicity in hadronic events of 〈Nch〉=21.3±0.1 (statistical)±0.6 (systematic). The data are in good agreement with QCD-based models which use the leading-logarithm approximation, and are less well described by a model using O(αs2) QCD.
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