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Observation of monojet events and tentative interpretation
Authors :
Buskulic, D. Casper, D. De Bonis, I. Decamp, D. Ghez, P. Goy, C. Lees, J.-P. Minard, M.-N. Odier, P. Pietrzyk, B. Ariztazabal, F. Chmeissani, M. Crespo, J.M. Efthymiopoulos, I. Fernandez, E. Fernandez-Bosman, M. Gaitan, V. Garrido, Ll. Martinez, M. Mattison, T. Orteu, S. Pacheco, A. Padilla, C. Palla, F. Pascual, A. Perlas, J.A. Teubert, F. Creanza, D. de Palma, M. Farilla, A. Iaselli, G. Maggi, G. Marinelli, N. Natali, S. Nuzzo, S. Ranieri, A. Raso, G. Romano, F. Ruggieri, F. Selvaggi, G. Silvestris, L. Tempesta, P. Zito, G. Chai, Y. Huang, D. Huang, X. Lin, J. Wang, T. Xie, Y. Xu, D. Zhang, J. Zhang, L. Zhao, W. Donvicini, G. Boudreau, J. Comas, P. Coyle, P. Drevermann, H. Engelhardt, A. Foà, L. Forty, R.W. Ganis, G. Gay, C. Girone, M. Hagelberg, R. Harvey, J. Jacobsen, R. Jost, B. Knobloch, J. Lehraus, I. Maggi, M. Markou, C. Martin, E.B. Mato, P. Meinhard, H. Minten, A. Miquel, R. Palazzi, P. Pater, J.R. Perrodo, P. Pusztaszeri, J.-F. Ranjard, F. Rolandi, L. Rothberg, J. Saich, M. Schlatter, D. Schmelling, M. Tejessy, W. Tomalin, I.R. Veenhof, R. Venturi, A. Wachsmuth, H. Wasserbaech, S. Wiedenmann, W. Wildish, T. Witzeling, W. Wotschack, J. Ajaltouni, Z. Bardadin-Otwinowska, M. Barres, A. Boyer, C. Falvard, A. Gay, P. Guicheney, C. Henrard, P. Jousset, J. Michel, B. Montret, J-C. Pallin, D. Perret, P. Podlyski, F. Proriol, J. Saadi, F. Fearnley, T. Hansen, J.B. Hansen, J.D. Hansen, J.R. Hansen, P.H. Johnson, S.D. Møllerud, R. Nilsson, B.S. Kyriakis, A. Simopoulou, E. Siotis, I. Vayaki, A. Zachariadou, K. Blondel, A. Bonneaud, G. Brient, J.C. Bourdon, P. Passalacqua, L. Rougé, A. Rumpf, M. Tanaka, R. Valassi, A. Verderi, M. Videau, H. Candlin, D.J. Parsons, M.I. Veitch, E. Focardi, E. Parrini, G. Corden, M. Delfino, M. Georgiopoulos, C. Jaffe, D.E. Levinthal, D. Antonelli, A. Bencivenni, G. Bologna, G. Bossi, F. Campana, P. Capon, G. Cerutti, F. Chiarella, V. Felici, G. Laurelli, P. Mannocchi, G. Murtas, F. Murtas, G.P. Pepe-Altarelli, M. Salomone, S. Colrain, P. ten Have, I. Knowles, I.G. Lynch, J.G. Maitland, W. Morton, W.T. Raine, C. Reeves, P. Scarr, J.M. Smith, K. Smith, M.G. Thompson, A.S. Thorn, S. Turnbull, R.M. Becker, U. Braun, O. Geweniger, C. Hanke, P. Hepp, V. Kluge, E.E. Putzer, A. Rensch, B. Schmidt, M. Stenzel, H. Tittel, K. Wunsch, M. Beuselinck, R. Binnie, D.M. Cameron, W. Cattaneo, M. Colling, D.J. Dornan, P.J. Hassard, J.F. Konstantinidis, N. Moneta, L. Moutoussi, A. Nash, J. Payne, D.G. San Martin, G. Sedgbeer, J.K. Wright, A.G. Girtler, P. Kuhn, D. Rudolph, G. Vogl, R. Bowdery, C.K. Brodbeck, T.J. Finch, A.J. Foster, F. Hughes, G. Jackson, D. Keemer, N.R. Nuttall, M. Patel, A. Sloan, T. Snow, S.W. Whelan, E.P. Galla, A. Greene, A.M. Kleinknecht, K. Raab, J. Renk, B. Sander, H.-G. Schmidt, H. Walther, S.M. Wanke, R. Wolf, B. Bencheikh, A.M. Benchouk, C. Bonissent, A. Calvet, D. Carr, J. Diaconu, C. Etienne, F. Nicod, D. Payre, P. Roos, L. Rousseau, D. Schwemling, P. Talby, M. Abt, I. Adlung, S. Assmann, R. Bauer, C. Blum, W. Brown, D. Cattaneo, P. Dehning, B. Dietl, H. Dydak, F. Frank, M. Halley, A.W. Jakobs, K. Kroha, H. Lauber, J. Lütjens, G. Lutz, G. Männer, W. Moser, H.-G. Richter, R. Schröder, J. Schwarz, A.S. Settles, R. Seywerd, H. Stierlin, U. Stiegler, U. St. Denis, R. Wolf, G. Alemany, R. Boucrot, J. Callot, O. Cordier, A. Courault, F. Davier, M. Duflot, L. Grivaz, J.-F. Heusse, Ph. Jacquet, M. Janot, P. Kim, D.W. Le Diberder, F. Lefrançois, J. Lutz, A.-M. Musolino, G. Nikolic, I. Park, H.J. Park, I.C. Schune, M.-H. Simion, S. Veillet, J.-J. Videau, I. Abbaneo, D. Bagliwsi, G. Batignani, G. Bottigli, U. Bozzi, C. Calderini, G. Carpinelli, M. Ciocci, M.A. Ciulli, V. Dell'Orso, R. Ferrante, I. Fidecaro, F. Forti, F. Giassi, A. Giorgi, M.A. Gregorio, A. Ligabue, F. Lusiani, A. Marrocchesi, P.S. Messineo, A. Rizzo, G. Sanguinetti, G. Spagnolo, P. Steinberger, J. Tenchini, R. Tonelli, G. Triggiani, G. Vannini, C. Verdini, P.G. Walsh, J. Betteridge, A.P. Gao, Y. Green, M.G. Johnson, D.L. March, P.V. Medcalf, T. Mir, Ll.M. Quazi, I.S. Strong, J.A. Bertin, V. Botterill, D.R. Clifft, R.W. Edgecock, T.R. Haywood, S. Edwards, M. Norton, P.R. Thompson, J.C. Bloch-Devaux, B. Colas, P. Duarte, H. Emery, S. Kozanecki, W. Lançon, E. Lemaire, M.C. Locci, E. Marx, B. Perez, P. Rander, J. Renardy, J.-F. Rosowsky, A. Roussarie, A. Schuller, J.-P. Schwindling, J. Si Mohand, D. Vallage, B. Johnson, R.P. Litke, A.M. Taylor, G. Wear, J. Beddall, A. Booth, C.N. Cartwright, S. Combley, F. Dawson, I. Koksal, A. Rankin, C. Thompson, L.F. Böhrer, A. Brandt, S. Cowan, G. Feigl, E. Grupen, C. Lutters, G. Minguet-Rodriguez, J. Rivera, F. Saraiva, P. Schäfer, U. Smolik, L. Bosisio, L. Della Marina, R. Giannini, G. Gobbo, B. Pitis, L. Ragusa, F. Bellantoni, L. Conway, J.S. Feng, Z. Ferguson, D.P.S. Gao, Y.S. Grahl, J. Harton, J.L. Hayes, O.J. Hu, H. Nachtman, J.M. Pan, Y.B. Saadi, Y. Schmitt, M. Scott, I. Sharma, V. Turk, J.D. Walsh, A.M. Weber, F.V. Wu, San Lan Wu, X. Yamartino, J.M. Zheng, M. Zobernig, G.
Source :
Physics Letters B; August 1994, Vol. 334 Issue: 1-2 p244-252, 9p
Publication Year :
1994
Abstract
A data sample corresponding to almost two million hadronic Z decays collected by the ALEPH detector at LEP has been searched for monojet events. Three events were found, in agreement with the expectation from the process e+e−→γ*vv¯, with γ*→ff¯. Two events are hadronic, the third one being an e+e−pair. All monojet masses are in excess of 3 GeV/c2, and two of the event have large transverse momenta: 18.5 and 20.3 GeV/c. These kinematic characteristics are quite unlikely in the process e+e−→γ*vv¯. The probability of their occurence increases substantially when processes involving further Z or W exchanges are taken into account, but still remains at the 5% level.
Details
Language :
English
ISSN :
03702693
Volume :
334
Issue :
1-2
Database :
Supplemental Index
Journal :
Physics Letters B
Publication Type :
Periodical
Accession number :
ejs3183362
Full Text :
https://doi.org/10.1016/0370-2693(94)90619-X