Searches for sleptons and squarks in e+e- collisions at 189 GeV

R. Barate, D. Decamp, P. Ghez, C. Goy, S. Jezequel, J. P. Lees, F. Martin, E. Merle, M. N. Minard, B. Pietrzyk, R. Alemany, S. Bravo, M. P. Casado, M. Chmeissani, J. M. Crespo, E. Fernandez, M. Fernandez-Bosman, L. Garrido, E. Grauges, A. JusteM. Martinez, G. Merino, R. Miquel, L. M. Mir, P. Morawitz, A. Pacheco, I. Riu, H. Ruiz, A. Colaleo, D. Creanza, 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, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, G. Boix, O. Buchmüller, M. Cattaneo, F. Cerutti, V. Ciulli, G. Davies, G. Dissertori, H. Drevermann, R. W. Forty, M. Frank, F. Gianotti, T. C. Greening, A. W. Halley, J. B. Hansen, J. Harvey, P. Janot, B. Jost, M. Kado, O. Leroy, P. Maley, P. Mato, A. Minten, A. Moutoussi, F. Ranjard, L. Rolandi, D. Schlatter, M. Schmitt, O. Schneider, P. Spagnolo, W. Tejessy, F. Teubert, E. Tournefier, A. E. Wright, Z. Ajaltouni, F. Badaud, G. Chazelle, O. Deschamps, S. Dessagne, A. Falvard, C. Ferdi, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, S. Monteil

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33 Citations (Scopus)

Abstract

The data collected at a centre-of-mass energy of 188.6 GeV by ALEPH at LEP, corresponding to an integrated luminosity of 173.6 pb-1, are analysed in a search for the scalar partners of quarks and leptons predicted in supersymmetric models. No evidence for any such particles was found in the decay channels ℓ̃→ℓX, t̃→cX, t̃→bℓṽ, b̃→bX, and q̃ → q X. Improved mass lower limits have been obtained in the framework of the Minimal Supersymmetric Standard Model. © 1999 Published by Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)303-314
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume469
Issue number1-4
DOIs
Publication statusPublished - 1 Jan 1999

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