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GIUSEPPE RASO

Four-jet final state production in e+e- collisions at centre-of-mass energies of 130 and 136 GeV

  • Authors: Buskulic, D; de Bonis, I; Decamp, D; Ghez, P; Goy, C; Lees, JP; Lucotte, A; Minard, MN; Odier, P; Pietrzyk, B; Casado, MP; Chmeissani, M; Crespo, JM; Delfino, M; Efthymiopoulos, I; Fernandez, E; FernandezBosman, M; Garrido, L; Juste, A; Martinez, M; Orteu, S; Padilla, C; Pascual, A; Perlas, JA; Riu, I; Sanchez, F; Teubert, F; Colaleo, A; Creanza, D; de Palma, M; Gelao, G; Girone, M; Iaselli, G; Maggi, G; Maggi, M; Marinelli, N; Nuzzo, S; Ranieri, A; Raso, G; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Zito, G; Huang, X; Lin, J; Ouyang, Q; Wang, T; Xie, Y; Xu, R; Xue, S; Zhang, J; Zhang, L; Zhao, W; Alemany, R; Bazarko, AO; Cattaneo, M; Comas, P; Coyle, P; Drevermann, H; Forty, RW; Frank, M; Hagelberg, R; Harvey, J; Janot, P; Jost, B; Kneringer, E; Knobloch, J; Lehraus, I; Lutters, G; Martin, EB; Mato, P; Minten, A; Miquel, R; Mir, LM; Moneta, L; Oest, T; Pacheco, A; Pusztaszeri, JF; Ranjard, F; Rensing, P; Rolandi, L; Schlatter, D; Schmelling, M; Schneider, O; Tejessy, W; Tomalin, IR; Venturi, A; Wachsmuth, H; Wagner, A; Ajaltouni, Z; Barrès, A; Boyer, C; Falvard, A; Gay, P; Guicheney, C; Henrard, P; Jousset, J; Michel, B; Monteil, S; Montret, JC; Pallin, D; Perret, P; Podlyski, F; Proriol, J; Rosnet, P; Rossignol, JM; Fearnley, T; Hansen, JB; Hansen, JD; Hansen, JR; Hansen, PH; Nilsson, BS; Wäänänen, A; Kyriakis, A; Markou, C; Simopoulou, E; Siotis, I; Vayaki, A; Zachariadou, K; Blondel, A; Brient, JC; Rougé, A; Rumpf, M; Valassi, A; Videau, H; Focardi, E; Parrini, G; Corden, M; Georgiopoulos, C; Jaffe, DE; Antonelli, A; Bencivenni, G; Bologna, G; Bossi, F; Campana, P; Capon, G; Casper, D; Chiarella, V; Felici, G; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, GP; Passalacqua, L; PepeAltarelli, M; Curtis, L; Dorris, SJ; Halley, AW; Knowles, IG; Lynch, JG; O'Shea, V; Raine, C; Reeves, P; Scarr, TM; Smith, K; Thompson, AS; Thomson, F; Thorn, S; Turnbull, RM; Becker, U; Geweniger, C; Graefe, G; Hanke, P; Hansper, G; Hepp, V; Kluge, EE; Putzer, A; Rensch, B; Schmidt, M; Sommer, J; Stenzel, H; Tittel, K; Werner, S; Wunsch, M; Abbaneo, D; Beuselinck, R; Binnie, DM; Cameron, W; Doman, PJ; Moutoussi, A; Nash, J; Sedgbeer, JK; Stacey, AM; Williams, MD; Dissertori, G; Girtler, P; Kuhn, D; Rudolph, G; Betteridge, AP; Bowdery, CK; Colrain, P; Crawford, G; Finch, AJ; Foster, F; Hughes, G; Sloan, T; Whelan, EP; Williams, MI; Galla, A; Greene, AM; Hoffmann, C; Kleinknecht, K; Quast, G; Renk, B; Rohne, E; Sander, HG; van Gemmeren, P; Zeitnitz, C; Aubert, JJ; Bencheikh, AM; Benchouk, C; Bonissent, A; Bujosa, G; Calvet, D; Carr, J; Diaconu, C; Konstantinidis, N; Payre, P; Rousseau, D; Talby, M; Sadouki, A; Thulasidas, M; Tilquin, A; Trabelsi, K; Aleppo, M; Ragusa, F; Abt, L; Assmann, R; Bauer, C; Blum, W; Died, H; Dydak, F; Ganis, G; Gotzhein, C; Jakobs, K; Kroha, H; Lütjens, G; Lutz, G; Männer, W; Moser, HG; Richter, R; RosadoSchlosser, A; Schael, S; Settles, R; Seywerd, H; St Denis, R; Wiedenmann, W; Wolf, G; Boucrot, J; Callot, O; Cordier, A; Davier, M; Duflot, L; Grivaz, JF; Heusse, P; Höcker, A; Jacquet, M; Kim, DW; Le Diberder, F; Lefrançois, J; Lutz, AM; Nikolic, I; Park, HJ; Park, IC; Schune, MH; Simion, S; Veillet, JJ; Videau, L; Zerwas, D; Azzurri, P; Bagliesi, G; Batignain, G; Bettarini, S; Bozzi, C; Calderini, G; Carpinelli, M; Ciocci, MA; Ciulli, V; Dell'Orso, R; Fantechi, R; Ferrante, I; Giassi, A; Gregorio, A; Ligabue, F; Lusiani, A; Marrocchesi, PS; Messineo, A; Palla, F; Rizzo, G; Sanguinetti, G; Sciabà, A; Spagnolo, P; Steinberger, J; Tenchini, R; Tonelli, G; Vannini, C; Verdini, PG; Walsh, J; Blair, GA; Bryant, LM; Cerutti, F; Chambers, JT; Gao, Y; Green, MG; Medcalf, T; Perrodo, P; Strong, JA; von WimmerspergToeller, JH; Botterill, DR; Clifft, RW; Edgecock, TR; Haywood, S; Maley, P; Norton, PR; Thompson, JC; Wright, AE; BlochDevaux, B; Colas, P; Emery, S; Kozanecki, W; Lançon, E; Lemaire, MC; Locci, E; Marx, B; Perez, P; Rander, J; Renardy, JF; Roussarie, A; Schulle
  • Publication year: 2011
  • Type: Articolo in rivista (Articolo in rivista)
  • OA Link: http://hdl.handle.net/10447/75471

Abstract

The four-jet final state is analyzed to search for hadronic decays of pair-produced heavy particles. The analysis uses the ALEPH data collected at LEP in November 1995 at centre-of-mass energies of 130 and 136 GeV, corresponding to a total integrated luminosity of 5.7 pb-1. An excess of four jet events is observed with respect to the standard model predictions. In addition, these events exhibit an enhancement in the sum of the two di-jet masses around 105 GeV/c2. The properties of these events are studied and compared to the expectations from standard processes and to pair production hypotheses.