Search for charginos and neutralinos in e(+)e(-) collisions at centre-of-mass energies near 183 GeV and constraints on the MSSM parameter space

Authors
Barate, R Decamp, D Ghez, P Goy, C Jezequel, S Lees, JP Martin, F Merle, E Minard, MN Nief, JY Pietrzyk, B Alemany, R Casado, MP Chmeissani, N Crespo, JM Delfino, M Fernandez, E Fernandez-Bosman, M Garrido, L Grauges, E Juste, A Martinez, M Merino, G Miquel, R Mir, LM Morawitz, P Pacheco, A Park, IC Pascual, A Riu, I Sanchez, F Colaleo, A Creanza, D de Palma, M Gelao, G 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 Becker, U Boix, G Cattaneo, M Ciulli, V Dissertori, G Drevermann, H Forty, RW Frank, M Gianotti, F Halley, AW Hansen, JB Harvey, J Janot, P Jost, B Lehraus, I Leroy, O Loomis, C Maley, P Mato, P Minten, A Moutoussi, A Ranjard, F Rolandi, L Rousseau, D Schlatter, D Schmitt, M Schneider, O Tejessy, W Teubert, F Tomalin, IR Tournefier, E Vreeswijk, M Wright, AE Ajaltouni, Z Badaud, F Chazelle, G Deschamps, O Dessagne, S Falvard, A Ferdi, C Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Monteil, S Montret, JC Pallin, D Perret, P Podlyski, F Hansen, JD Hansen, JR Hansen, PH Nilsson, BS Rensch, B Waananen, A Daskalakis, G Kyriakis, A Markou, C Simopoulou, E Vayaki, A Blondel, A Brient, JC Machefert, F Rouge, A Swynghedauw, M Tanaka, R Valassi, A Videau, H Focardi, E Parrini, G Zachariadou, K Cavanaugh, R Corden, N Georgiopoulos, C Antonelli, A Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Cerutti, F Chiarella, V Laurelli, P Mannocchi, G Murtas, F Murtas, GP Passalacqua, L Pepe-Altarelli, M Clalmers, M Curtis, L Lynch, JG Negus, P O'Shea, V Raeven, B Raine, C Smith, D Teixeira-Dias, P Thompson, AS Ward, JJ Buchmuller, O Dhamotharan, S Geweniger, C Hanke, P Hansper, G Hepp, V Kluge, EE Putzer, A Sommer, J Tittel, K Werner, S Wunsch, M Beuselinck, R Binnie, DM Cameron, W Dornan, PJ Girone, M Goodsir, S Marinelli, N Martin, EB Nash, J Nowell, J Sedgbeer, JK Spagnolo, P Thomson, E Williams, MD Ghete, VM Girtler, P Kneringer, E Kuhn, D Rudolph, G Betteridge, AP Bowdery, CK Buck, PG Colrain, P Crawford, G Ellis, G Finch, AJ Foster, F Hughes, G Jones, RWL Robertson, NA Williams, MI van Gemmeren, P Giehl, I Holldorfer, F Hoffmann, C Jakobs, K Kleinknecht, K Krocker, M Nurnberger, HA Quast, G Renk, B Rohne, E Sander, HG Schmeling, S Wachsmuth, H Zeitnitz, C Ziegler, T Aubert, JJ Benchouk, C Bonissent, A Carr, J Coyle, P Ealet, A Fouchez, D Motsch, F Payre, P Talby, M Thulasidas, R Tilquin, A Aleppo, M Antonelli, M Ragusa, F Berlich, R Buscher, V Dietl, H Ganis, G Huttmann, K Lutjens, G Mannert, C Manner, W Moser, HG Schael, S Settles, R Seywerd, H Stenzel, H Wiedenmann, W Wolf, G Azzurri, P Boucrot, J Callot, O Chen, S Davier, M Duflot, L Grivaz, JF Heusse, P Jacholkowska, A Kado, M Lefrancois, J Serin, L Veillet, JJ Videau, I de Regie, JBD Zerwas, D Bagliesi, G Bettarini, S Boccali, T Bozzi, C Calderini, G Dell'Orso, R Ferrante, I Giassi, A Gregorio, A Ligabue, F Lusiani, A Marrocchesi, PS Messineo, A Palla, F Rizzo, G Sanguinetti, G Sciaba, A Sguazzoni, G Tenchini, R Vannini, G Venturi, A Verdini, PG Blair, GA Coles, J Cowan, G Green, MG Hutchcroft, DE Jones, LT Medcalf, T Strong, JA von Wimmersperg-Toeller, JH Botterill, DR Clifft, RW Edgecock, TR Norton, PR Thompson, JG Bloch-Devaux, B Colas, P Fabbro, B Faif, G Lancon, E Lemaire, MC Locci, E Perez, P Przysiezniak, H Rander, J Renardy, JF Rosowsky, A Trabelsi, A Tuchming, B Vallage, B Black, SN Dann, JH Kim, HY Konstantinidis, N Litke, AM McNeill, MA Taylor, G Booth, CN Cartwright, S Combley, F Hodgson, PN Kelly, MS Lehto, M Thompson, LF Affholderbach, K Bohrer, A Brandt, S Grupen, C Misiejuk, A Prange, G Sieler, U Giannini, G Gobbo, B Putz, J Rothberg, J Wasserbaech, S Williams, RW Armstrong, SR Charles, E Elmer, P Ferguson, DPS Gao, Y Gonzalez, S Greening, TC Hayes, OJ Hu, H Jin, S McNamara, PA Nachtman, JM Nielsen, J Orejudos, W Pan, YB Saadi, Y Scott, IJ Walsh, J Wu, SL Wu, X Zobernig, G
Citation
R. Barate et al., Search for charginos and neutralinos in e(+)e(-) collisions at centre-of-mass energies near 183 GeV and constraints on the MSSM parameter space, EUR PHY J C, 11(2), 1999, pp. 193-216
Citations number
39
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
14346044 → ACNP
Volume
11
Issue
2
Year of publication
1999
Pages
193 - 216
Database
ISI
SICI code
1434-6044(199911)11:2<193:SFCANI>2.0.ZU;2-2
Abstract
Searches for charginos and neutralinos are performed with the data collecte d by the ALEPH detector at LEP at centre-of-mass energies near 183 GeV. In these searches, it is assumed that R-parity is conserved and that the light est neutralino is the LSP. No evidence of a signal is observed in the 57pb( -1) accumulated, which excludes chargino and associated neutralino producti on up to the kinematic limit over large regions of the MSSM parameter space . Under the assumptions of common gaugino and common sfermion masses at the unification scale, the interplay between the chargino, neutralino and slep ton exclusion limits allows a lower bound of 27 GeV/c(2) to be set on the m ass of the lightest neutralino. Tighter constraints on the MSSM parameter s pace are obtained using in addition exclusions in the Higgs sector. Finally , the results are interpreted within the framework of minimal supergravity.