Search for scalar fermions and long-lived scalar leptons at centre-of-mass energies of 130 GeV to 172 GeV

H. B. Crawley,A. Firestone,J. Grahl,J. W. Lamsa,D. W. Lane,R. Mc Kay,W. T. Meyer,E. I. Rosenberg,L. Gorn,A. Deghorain,S. De Brabandere,C. De Clercq,D. Bertrand,P. Herquet,S. Hoorelbeke,K. Huet,V. Lefebure,A. Tomaradze,C. Vander Velde,A. Van Lysebetten,F. Verbeure,J. H. Wickens,R. Contri,E. G. Anassontzis,G. Voulgaris,C. Kourkoumelis,L. K. Resvanis,A. W. Borgland,B. Stugu,A. G. Frodesen,G. Eigen,A. C. Benvenuti,G. Valenti,S. Paiano,A. Perrotta,T. Rovelli,M. Begalli,M. E. Pol,J. R. Mahon,R. C. Shellard,P. Chochula,P. Kubinec,P. Rosinsky,R. Janik,P. Beilliere,J. Dolbeau,G. Tristram,J-M. Brunet,Yu. Belokopytov,M. Davenport,N. Demaria,A. De Angelis,T. Camporesi,F. Carena,A. Cattai,V. Chabaud,Ph. Charpentier,P. Collins,H. Dijkstra,A. Augustinus,P. Baillon,A. Andreazza,M. Elsing,P. -A. Fischer,H. Foeth,C. Gaspar,Ph. Gavillet,F. Hahn,S. Haider,H. Herr,R. Jacobsson,P. Jalocha,C. Joram,H. Klein,M. Koratzinos,C. Kreuter,D. Liko,J. -C. Marin,C. Mariotti,R. Mc Nulty,K. Moenig,N. Neufeld,L. Pape,P. Rebecchi,D. Reid,D. Treille,A. Tsirou,O. Ullaland,G. Barker,G. R. Wilkinson,G. Wolf,U. Amaldi,D. Bloch,M. Dracos,Ch. Cerruti,J-P. Engel,D. Gele,J-P. Gerber,P. Juillot,V. Nikolaenko,G. Orazi,R. Strub,T. Todorov,S. Todorova,M. Winter,I. Bozovic,P. Adzic,G. Fanourakis,D. Fassouliotis,K. Karafasoulis,P. Kokkinias,J. Krstic,A. Leisos,D. Loukas,A. Markou,N. Mastroyiannopoulos,K. Papageorgiou,D. Sampsonidis,S. Tzamarias,E. Zevgolatakos,M. Lokajicek,J. Ridky,V. Vrba,C. Caso,G. Crosetti,F. Fontanelli,V. Gracco,M. R. Monge,P. Morettini,F. Parodi,A. Petrolini,G. Piana,M. Sannino,S. Squarcia,F. Ledroit,R. Lopez-Fernandez,C. Mulet-Marquis,F. Naraghi,R. Nicolaidou,G. Sajot,Y. Arnoud,C. Berat,S. Czellar,A. Kiiskinen,K. Kurvinen,R. Lauhakangas,V. Nomokonov,M. Battaglia,R. Orava,K. Osterberg,H. Saarikko,M. S. Bilenky,G. A. Chelkov,I. Boyko,B. A. Khomenko,N. N. Khovanski,O. Kouznetsov,Z. Krumstein,V. Malychev,N. I. Zimin,M. Nikolenko,A. G. Olshevski,V. Pozdniakov,N. Pukhaeva,A. Sadovsky,Y. Sedykh,A. N. Sisakian,L. G. Tkatchev,I. A. Tyapkin,L. S. Vertogradov,A. S. Vodopyanov,G. D. Alekseev,N. I. Zimin,D. Y. Bardin,W. De Boer,R. Ehret,M. Feindt,S. Heising,R. Keranen,D. Knoblauch,H. Schneider,U. Schwickerath,A. Sopczak,C. Weiser, W-D. Ape,W. Kucewicz,T. Lesiak,B. Muryn,H. Palka,G. Polok,M. Witek,A. Zalewska,P. Bruckman,M-A. Bizouard,G. Borisov,B. Bouquet,C. Bourdarios,E. Ferrer-Ribas,F. Fulda-Quenzer,S. Gamblin,B. Jean-Marie,V. Lepeltier,C. Martinez-Rivero,F. Richard,P. Roudeau,G. Cosme,A. Stocchi,P. Bambade,P. N. Ratoff,P. Seager,P. Abreu,S. Andringa,F. Barao,M. Espirito Santo,P. Goncalves,A. Maio,A. Onofre,R. Paiva,L. Peralta,M. Pimenta,T. Spassov,B. Tome,P. S. L. Booth,T. J. V. Bowcock,P. P. Allport,L. Carroll,A. Galloni,C. Green,M. Houlden,J. N. Jackson,B. King,S. Marti i Garcia,M. Mc Cubbin,G. Mc Pherson,A. Normand,U. Parzefall,A. Sheridan,J. -H. Cowell,W. Da Silva,M. Baubillier,J. Fayot,S. Fichet,F. Kapusta,X. Moreau,R. Pain,Ph. Schwemling,E. Falk,V. Hedberg,Ch. Jarlskog,G. Jarlskog,P. Jonsson,B. Loerstad,U. Mjoernmark,R. Muresan,A. Nygren,O. Smirnova,G. Transtromer,S. Almehed,P. Antilogus,R. Barbier,M. Berggren,D. Bertini,J. -E. Augustin,J. -D. Durand,A. Duperrin,L. Chaussard,V. Chorowicz,N. Ghodbane,S. Katsanevas,L. Mirabito,G. Smadja,P. Delpierre,A. Tilquin,P. Ferrari,C. Matteuzzi,C. Meroni,P. Negri,M. Paganoni,E. Piotto,A. Pullia,S. Ragazzi,N. G. Redaelli,T. Tabarelli,F. Terranova,A. Tonazzo,C. Troncon,G. Vegni,M. Caccia,M. Calvi,M. Bonesini,W. Bonivento,R. Moeller,B. S. Nielsen,G. Damgaard,J. Mazik,R. Leitner,J. Chudoba,E. Boudinov,H. M. Blom,D. Holthuizen,N. J. Kjaer,P. Kluit,M. Mulders,J. Timmermans,D. Z. Toet,G. W. Van Apeldoorn,P. Van Dam,J. Van Eldik,I. Van Vulpen,E. Fokitis,E. N. Gazis,E. C. Katsoufis,Th. D. Papadopoulou,M. Dris,H. Rahmani,T. Myklebust,A. L. Read,O. Rohne,T. B. Skaali,S. Stapnes,L. Bugge,T. Buran,J. Cuevas Maestro,F. J. Harris, T. L. Hessing,P. J. Holt,J. Libby,J. G. Loken,L. Lyons,G. Morton,G. Myatt,J. Palacios,C. Parkes,D. Radojicic, P. B. Renton,A. M. Segar,K. Stevenson,J. Thomas,N. Vassilopoulos,F. J. Harris,T. L. Hessing,P. J. Holt,J. Libby,J. G. Loken,L. Lyons,G. Morton,G. Myatt,J. Palacios,C. Parkes,D. Radojicic,P. B. Renton,A. M. Segar,K. Stevenson,J. Thomas,N. Vassilopoulos,P. Checchia,G. Zumerle,A. De Min,U. Gasparini,I. Lippi,M. Margoni,F. Mazzucato,M. Mazzucato,M. Pegoraro,P. Ronchese,F. Simonetto,L. Ventura,M. Verlato,B. Franek,G. Gopal,J. Guy,W. J. Murray,H. T. Phillips,R. Sekulin,G. R. Smith,W. Venus,T. Adye,D. Crennell,L. Di Ciaccio,A. Di Diodato,G. Matthiae,P. Privitera,V. Verzi,V. Canale,A. Baroncelli,P. Branchini,E. Graziani,A. Passeri,E. Spiriti,C. Stanescu,L. Tortora,F. Cossutti,M. Boonekamp,M. Besancon,P. Gris,P. Jarry,J-P. Laugier,M. Lethuillier,P. Lutz,A. Ouraou,F. Pierre,V. Ruhlmann-Kleider,Y. Sacquin,R. Silvestre,L. Simard,M-L. Turluer,D. Vilanova,A. J. Camacho Rozas,J. Garcia,I. Gonzalez Caballero,J. M. Lopez,J. Marco,R. Marco,F. Matorras,A. Ruiz,C. Bosio,I. Ajinenko,P. Chliapnikov,Yu. Gouz,A. Konopliannikov,V. Kostioukhine,V. Lapin,A. Miagkov,V. Obraztsov,N. Smirnov,O. Tchikilev,V. Uvarov,E. Vlasov,O. Yushchenko,B. Erzen,B. Golob,E. Kriznic,T. Podobnik,S. Stanic,D. Zavrtanik,G. Ekspong,S-O. Holmgren,K. Hultqvist,E. K. Johansson,L. Leinonen,A. Lipniacka,T. G. M. Malmgren,T. Moa,C. Walck,G. C. Zucchelli,B. Åsman,P. Andersson,F. Bianchi,M. Bigi,R. Chierici,D. Gamba,E. Migliore,G. Rinaudo,A. Romero,G. Barbiellini, G. Delia Ricca,B. De Lotto,C. Petridou,P. Poropat,F. Scuri,E. Vallazza,L. Vitale,L. De Paula,M. Gandelman,M. Gaspar,J. H. Lopes,B. Marechal,S. Amato,O. Botner,R. A. Brenner,T. Ekelof,M. Ellert,M. Günther,A. Hallgren,F. Tegenfeldt,S. Cabrera,M. V. Castillo Gimenez,A. Ferrer,J. Fuster,C. Garcia,I. Gil,J. J. Hernandez,E. Higon,F. Martinez-Vidal,S. Navas,J. Salt,M. Colomer,E. Cortina,R. Alemany,W. Adam,R. Fruhwirth,J. Hrubec,M. Krammer,G. Leder,J. MacNaughton,F. Mandl,N. Neumeister,M. Pernicka,D. Rakoczy,M. Regler,D. Stampfer,J. Strauss,K. Doroba,R. Gokieli,M. Gorski,K. Grzelak,K. Nawrocki,R. Sosnowski,M. Szczekowski,M. Szeptycka,P. Zalewski,K-H. Becks,T. Brenke,T. Burgsmueller,P. Buschmann,J. Drees,U. Flagmeyer,F. Glege,S. Hahn,K. Hamacher,J. -M. Heuser,O. Klapp,P. Langefeld,G. Lenzen,A. Malek,U. Mueller,K. Muenich,O. Passon,R. Reinhardt,M. A. E. Schyns,M. Siebel,P. Sponholz,B. Ueberschaer,H. Wahlen,D. Wicke

The European Physical Journal C - Particles and Fields（1999）

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摘要

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/c 2 at the 95% confidence level, irrespective of the gravitino mass.

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Transverse Momentum,Impact Parameter,Decay Length,Light Neutralino,Time Projection Chamber

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