https://doi.org/10.1007/s100529801043
Search for scalar fermions and long-lived scalar leptons at centre-of-mass energies of 130 GeV to 172 GeV
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Department of Physics and Astronomy, Iowa State University, 50011-3160, Ames, IA, USA
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Physics Department, Univ. Instelling Antwerpen, Universiteitsplein 1, BE-2610, Wilrijk, Belgium
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IIHE, ULB-VUB, Pleinlaan 2, 1050, Brussels, BE, Belgium
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Faculté des Sciences, Univ. de l’ Etat Mons, Av. Maistriau 19, 7000, Mons, BE, Belgium
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Physics Laboratory, University of Athens, Solonos Str. 104, 10680, Athens, GR, Greece
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Department of Physics, University of Bergen, Allégaten 55, 5007, Bergen, NO, Norway
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Dipartimento di Fisica, Università di Bologna and INFN, Via Irnerio 46, 1-40126, Bologna, Italy
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Centro Brasileiro de Pesquisas Físicas, rua Xavier Sigaud 150, 22290, Rio de Janeiro, BR, Brazil
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Depto. de Física, Pont. Univ. Católica, O.P. 38071, 22453, Rio de Janeiro, BR, Brazil
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Inst, de Física, Univ. Estadual do Rio de Janeiro, rua São Francisco Xavier 524, Rio de Janeiro, Brazil
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Faculty of Mathematics and Physics, Comenius University, Mlynska Dolina, 84215, Bratislava, SK, Slovakia
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Collège de France, Lab. de Physique Corpusculaire, IN2P3-CNRS, 75231, Paris Cedex 05, FR, France
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CERN, CH-1211, Geneva 23, Switzerland
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Institut de Recherches Subatomiques, IN2P3 – CNRS/ULP – BP20, F-67037, Strasbourg Cedex, France
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Institute of Nuclear Physics, N.C.S.R. Demokritos, P.O. Box 60228, 15310, Athens, GR, Greece
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Inst. of Phys. of the C.A.S. High Energy Physics Division, FZU, Na Slovance 2, 180 40, Praha 8, CZ, Czech Republic
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Dipartimento di Fisica, Università di Genova and INFN, Via Dodecaneso 33, 1-16146, Genova, Italy
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Institut des Sciences Nucléaires, IN2P3-CNRS, Université de Grenoble 1, F-38026, Grenoble Cedex, France
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Helsinki Institute of Physics, HIP, P.O. Box 9, 00014, Helsinki, FI, Finland
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Joint Institute for Nuclear Research, Dubna, Head Post Office, P.O. Box 79, 101 000, Moscow, RU, Russian Federation
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Institut für Experimentelle Kernphysik, Universität Karlsruhe, Postfach 6980, D-76128, Karlsruhe, Germany
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Institute of Nuclear Physics and University of Mining and Metalurgy, Ul. Kawiory 26a, 30055, Krakow, PL, Poland
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Lab. de l’Accélérateur Linéaire, Université de Paris-Sud, IN2P3-CNRS, Bât. 200, FR-91405, Orsay, Cedex, France
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School of Physics and Chemistry, University of Lancaster, LA1 4YB, Lancaster, UK
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LIP, IST, FCUL — Av. Elias Garcia, 14-1o, PT-1000, Lisboa, Codex, Portugal
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Department of Physics, University of Liverpool, P.O. Box 147, L69 3BX, Liverpool, UK
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LPNHE, IN2P3-CNRS, Univ. Paris VI et VII, Tour 33 (RdC), 4 place Jussieu, FR-75252, Paris, Cedex 05, France
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Department of Physics, University of Lund, Sölvegatan 14, SE-223 63, Lund, Sweden
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Université Claude Bernard de Lyon, IPNL, IN2P3-CNRS, FR-69622, Villeurbanne, Cedex, France
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IN2P3-CNRS, Univ. d’ Aix – Marseille II — CPP, FR-13288, Marseille, Cedex 09, France
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Dipartimento di Fisica, Università di Milano and INFN, Via Celoria 16, IT-20133, Milan, Italy
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Niels Bohr Institute, Blegdamsvej 17, DK-2100, Copenhagen Ø, Denmark
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NC, Nuclear Centre of MFF, Charles University, Areal MFF, V Holesovickach 2, CZ-180 00, Praha 8, Czech Republic
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NIKHEF, Postbus 41882, NL-1009, Amsterdam, DB, The Netherlands
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Physics Department, National Technical University, Zografou Campus, GR-15773, Athens, Greece
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Physics Department, University of Oslo, NO-1000, Blindem, Oslo 3, Norway
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Dpto. Fisica, Univ. Oviedo, Avda. Calvo Sotelo s/n, ES-33007, Oviedo, Spain
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Department of Physics, University of Oxford, Keble Road, OX1 3RH, Oxford, UK
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Dipartimento di Fisica, Università di Padova and INFN, Via Marzolo 8, IT-35131, Padua, Italy
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Rutherford Appleton Laboratory, OX11 OQX, Chilton, Didcot, UK
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Dipartimento di Fisica, Università di Roma II and INFN, 1-00173, Tor Vergata, Rome, Italy
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Dipartimento di Fisica, Università di Roma III and INFN, Via délia Vasca Navale 84, 1-00146, Rome, Italy
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DAPNIA/Service de Physique des Particules, CEA-Saclay, F-91191, Gif-sur-Yvette Cedex, France
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Instituto de Fisica de Cantabria (CSIC-UC), Avda. los Castros s/n, E-39006, Santander, Spain
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Dipartimento di Fisica, Università degli Studi di Roma La Sapienza, Piazzale Aldo Moro 2, 1-00185, Rome, Italy
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Inst. for High Energy Physics, Serpukov P.O. Box 35, Protvino, (Moscow Region), Russian Federation
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J. Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
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Department of Astroparticle Physics, School of Environmental Sciences, Kostanjeviska 16a, SI-5000, Nova Gorica, Slovenia
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Department of Physics, University of Ljubljana, SI-1000, Ljubljana, Slovenia
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Fysikum, Stockholm University, Box 6730, SE-113 85, Stockholm, Sweden
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Dipartimento di Fisica Sperimentale, Università di Torino and INFN, Via P. Giuria 1, 1-10125, Turin, Italy
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Dipartimento di Fisica, Università di Trieste and INFN, Via A. Valerio 2, I-34127, Trieste, Italy
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Istituto di Fisica, Università di Udine, I-33100, Udine, Italy
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Univ. Federal do Rio de Janeiro, C.P. 68528 Cidade Univ., Ilha do Fundão BR-21945-970, Rio de Janeiro, Brazil
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Department of Radiation Sciences, University of Uppsala, P.O. Box 535, SE-751 21, Uppsala, Sweden
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Valencia-CSIC, and D.F.A.M.N., U. de Valencia, IFIC, Avda. Dr. Moliner 50, E-46100, Burjassot (Valencia), Spain
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Institut für Hochenergiephysik, Österr. Akad. d. Wissensch., Nikolsdorfergasse 18, A-1050, Vienna, Austria
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Inst. Nuclear Studies and University of Warsaw, Ul. Hoza 69, PL-00681, Warsaw, Poland
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Fachbereich Physik, University of Wuppertal, Postfach 100 127, D-42097, Wuppertal, Germany
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On leave of absence from IHEP Serpukhov, USA
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Now at University of Florida, USA
Received:
13
July
1998
Published online: 17 September 2013
Data taken by DELPHI during the 1995 and 1996 LEP runs have been used to search for the supersymmetric partners of electron, muon and tau leptons and of top and bottom quarks. The observations are in agreement with standard model predictions. Limits are set on sfermion masses. Searches for long lived scalar leptons from low scale supersymmetry breaking models exclude stau masses below 55 GeV/c2 at the 95% confidence level, irrespective of the gravitino mass.
© Springer-Verlag, 1999