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Search for gauge mediated SUSY breaking topologies in $e^+ e^-$ collisions at centre-of-mass energies up to 209 GeV

By A. Heister, S. Schael, R. Barate, R. Bruneliere, I. De Bonis, D. Decamp, C. Goy, S. Jezequel, J P. Lees, F. Martin, E. Merle, M N. Minard, B. Pietrzyk, B. Trocme, G. Boix, S. Bravo, M P. Casado, M. Chmeissani, J M. Crespo, E. Fernandez, M. Fernandez-Bosman, L. Garrido, E. Grauges, J. Lopez, M. Martinez, G. Merino, R. Miquel, L M. Mir, A. Pacheco, D. Paneque, H. Ruiz, A. Colaleo, D. Creanza, N. De Filippis, M. De Palma, G. Iaselli, G. Maggi, M. Maggi, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, Jiali Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, P. Azzurri, T. Barklow, O. Buchmueller, M. Cattaneo, F. Cerutti, H. Drevermann, R W. Forty, M. Frank, F. Gianotti, T C. Greening, J B. Hansen, J. Harvey, D E. Hutchcroft, P. Janot, B. Jost, M. Kado, P. Mato, A. Moutoussi, F. Ranjard, L. Rolandi, D. Schlatter, G. Sguazzoni, W. Tejessy, F. Teubert, A. Valassi, I. Videau, J J. Ward, F. Badaud, S. Dessagne, Alain Falvard, D. Fayolle, Pascal Gay, J. Jousset, B. Michel, S. Monteil, D. Pallin, J M. Pascolo, Pascal Perret, J D. Hansen, J R. Hansen, P H. Hansen, B S. Nilsson, A. Kyriakis, C. Markou, E. Simopoulou, A. Vayaki, K. Zachariadou, A. Blondel, J C. Brient, F P. Machefert, A. Rouge, M. Swynghedauw, R. Tanaka, H. Videau, V. Ciulli, E. Focardi, G. Parrini, A. Antonelli, M. Antonelli, G. Bencivenni, F. Bossi, P. Campana, G. Capon, V. Chiarella, P. Laurelli, G. Mannocchi, F. Murtas, G P. Murtas, L. Passalacqua, A. Halley, J. Kennedy, J G. Lynch, P. Negus, V. O'Shea, A S. Thompson, S. Wasserbaech, R. Cavanaugh, S. Dhamotharan, P. Hanke, V. Hepp, E E. Kluge, G. Leibenguth, A. Putzer, H. Stenzel, K. Tittel, M. Wunsch, R. Beuselinck, W. Cameron, G. Davies, P J. Dornan, M. Girone, R D. Hill, N. Marinelli, J. Nowell, S A. Rutherford, J K. Sedgbeer, J C. Thompson, R. White, V M. Ghete, P. Girtler, E. Kneringer, D. Kuhn, G. Rudolph, E. Bouhova-Thacker, C K. Bowdery, D P. Clarke, G. Ellis, A J. Finch, F. Foster, G. Hughes, R W L. Jones, M R. Pearson, N A. Robertson, M. Smizanska, O. Van Der Aa, C. Delaere, V. Lemaitre, U. Blumenschein, F. Hoelldorfer, K. Jakobs, F. Kayser, K. Kleinknecht, A S. Mueller, G. Quast, B. Renk, H G. Sander, S. Schmeling, H. Wachsmuth, C. Zeitnitz, T. Ziegler, A. Bonissent, P. Coyle, C. Curtil, A. Ealet, D. Fouchez, P. Payre, A. Tilquin, F. Ragusa, A. David, H. Dietl, G. Ganis, K. Huettmann, G. Luetjens, W. Maenner, H G. Moser, R. Settles, G. Wolf, J. Boucrot, O. Callot, M. Davier, L. Duflot, J F. Grivaz, P. Heusse, A. Jacholkowska, C. Loomis, L. Serin, J J. Veillet, J B. De Vivie De Regie, C. Yuan, G. Bagliesi, T. Boccali, L. Foa, A. Giammanco, A. Giassi, F. Ligabue, A. Messineo, F. Palla, G. Sanguinetti, A. Sciaba, R. Tenchini, A. Venturi, P G. Verdini, O. Awunor, G A. Blair, G. Cowan, A. Garcia-Bellido, M G. Green, L T. Jones, T. Medcalf, A. Misiejuk, J A. Strong, P. Teixeira-Dias, T R. Edgecock, P R. Norton, I R. Tomalin, B. Bloch-Devaux, D. Boumediene, P. Colas, B. Fabbro, E. Lancon, M C. Lemaire, E. Locci, P. Perez, J. Rander, J F. Renardy, A. Rosowsky, P. Seager, A. Trabelsi, B. Tuchming, B. Vallage, N P. Konstantinidis, A M. Litke, G. Taylor, C N. Booth, S. Cartwright, F. Combley, P N. Hodgson, M H. Lehto, L F. Thompson, K. Affholderbach, A. Boehrer, S. Brandt, C. Grupen, J. Hess, A. Ngac, G. Prange, U. Sieler, C. Borean, G. Giannini, H. He, J. Puetz, J E. Rothberg, S R. Armstrong, K. Berkelman, K. Cranmer, D P S. Ferguson, Y. Gao, S. Gonzalez, O J. Hayes, H. Hu, S. Jin, J. Kile, P A. McNamara, J. Nielsen, Y B. Pan, J H. Von Wimmersperg-Toeller, W. Wiedenmann, J. Wu, S L. Wu, X. Wu, G. Zobernig and G. Dissertori

Abstract

A total of 628$\invpb$ of data collected with the ALEPH detector at centre-of-mass energies from 189 to 209\,GeV is analysed in the search for gauge mediated SUSY breaking (GMSB) topologies. These topologies include two acoplanar photons, non-pointing single photons, acoplanar leptons, large impact parameter leptons, detached slepton decay vertices, heavy stable charged sleptons and multi-leptons plus missing energy final states. No evidence is found for new phenomena, and lower limits on masses of supersymmetric particles are derived. A scan of a minimal GMSB parameter space is performed and lower limits are set for the next-to-lightest supersymmetric particle (NLSP) mass at 54$\gevcc$ and for the mass scale parameter $\Lambda$ at 10$\tevcc$, independently of the NLSP lifetime. Including the results from the neutral Higgs boson searches, a NLSP mass limit of 77$\gevcc$ is obtained and values of $\Lambda$ up to 16$\tevcc$ are excluded

Topics: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: Springer Verlag (Germany)
Year: 2002
OAI identifier: oai:HAL:in2p3-00011714v1
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