Searches for Prompt Light Gravitino Signatures in E+e- Collisions at Sqrt{s}=189gev

G Abbiendi,K Ackerstaff,C Ainsley,PF Akesson,G Alexander,J Allison,KJ Anderson,S Arcelli,S Asai, SF Ashby,D Axen,G Azuelos,I Bailey,AH Ball,E Barberio,RJ Barlow,JR Batley,S Baumann,T Behnke,KW Bell,G Bella,A Bellerive, S Bentvelsen,S Bethke,O Biebel,IJ Bloodworth,P Bock,J Bohme,O Boeriu,D Bonacorsi,M Boutemeur,S Braibant, P Bright-Thomas,L Brigliadori,RM Brown,HJ Burckhart,J Cammin,P Capiluppi,RK Carnegie,AA Carter,JR Carter, CY Chang,DG Charlton,C Ciocca,PEL Clarke,E Clay,I Cohen,OC Cooke,J Couchman,C Couyoumtzelis, RL Coxe,M Cuffiani, S Dado,GM Dallavalle,S Dallison,A de Roeck,P Dervan,K Desch,B Dienes,MS Dixit,M Donkers,J Dubbert,E Duchovni,G Duckeck,IP Duerdoth,PG Estabrooks,E Etzion,F Fabbri,M Fanti,L Feld,P Ferrari,F Fiedler,I Fleck,M Ford,A Frey,A Furtjes, DI Futyan,P Gagnon,JW Gary,G Gaycken,C Geich-Gimbel,G Giacomelli,P Giacomelli,D Glenzinski,J Goldberg,C Grandi,K Graham,E Gross,J Grunhaus,M Gruwe,PO Gunther,C Hajdu,GG Hanson, M Hansroul, M Hapke,K Harder,A Harel,CK Hargrove,M Harin-Dirac,A Hauke,M Hauschild,CM Hawkes, R Hawkings,RJ Hemingway,C Hensel, G Herten,RD Heuer,MD Hildreth,JC Hill,PR Hobson, A Hocker,K Hoffman,RJ Homer,AK Honma,D Horvath,KR Hossain,R Howard,P Huntemeyer,P Igo-Kemenes,DC Imrie,K Ishii,FR Jacob, A Jawahery, H Jeremie,CR Jones,P Jovanovic,TR Junk,N Kanaya,J Kanzaki,G Karapetian,D Karlen,V Kartvelishvili,K Kawagoe,T Kawamoto,RK Keeler,RG Kellogg,BW Kennedy,DH Kim,K Klein,A Klier,T Kobayashi,M Kobel,TP Kokott,S Komamiya,RV Kowalewski,T Kress,P Krieger,J von Krogh,T Kuhl,M Kupper,P Kyberd,GD Lafferty,H Landsman,D Lanske,I Lawson,JG Layter,A Leins,D Lellouch, J Letts,L Levinson,R Liebisch,J Lillich,B List,C Littlewood,AW Lloyd,SL Lloyd,FK Loebinger,GD Long,MJ Losty,J Lu,J Ludwig,A Macchiolo,A Macpherson,W Mader,M Mannelli, S Marcellini,TE Marchant,AJ Martin, JP Martin,G Martinez,T Mashimo,P Mattig,WJ McDonald,J McKenna,TJ McMahon,RA McPherson,F Meijers,P Mendez-Lorenzo,FS Merritt,H Mes,A Michelini,S Mihara,G Mikenberg,DJ Miller,W Mohr,A Montanari, T Mori,K Nagai,I Nakamura,HA Neal, R Nisius, SW O'Neale,FG Oakham,F Odorici,HO Ogren,A Oh,A Okpara,MJ Oreglia, S Orito,G Pasztor, JR Pater,GN Patrick,J Patt,P Pfeifenschneider,JE Pilcher,J Pinfold,DE Plane, B Poli,J Polok, O Pooth,M Przybycien,A Quadt,C Rembser,H Rick,SA Robins,N Rodning,JM Roney,S Rosati,K Roscoe,AM Rossi,Y Rozen,K Runge,O Runolfsson,DR Rust,K Sachs,T Saeki,O Sahr,WM Sang, EKG Sarkisyan,C Sbarra,AD Schaile,O Schaile,P Scharff-Hansen, S Schmitt,M Schroder,M Schumacher,C Schwick, WG Scott,R Seuster,TG Shears,BC Shen,CH Shepherd-Themistocleous,P Sherwood,GP Siroli,A Skuja,AM Smith, GA Snow,R Sobie,S Soldner-Rembold,S Spagnolo, M Sproston,A Stahl,K Stephens,K Stoll, D Strom,R Strohmer,B Surrow,SD Talbot,S Tarem,RJ Taylor,R Teuscher,M Thiergen,J Thomas, MA Thomson,E Torrence,S Towers,T Trefzger,I Trigger,Z Trocsanyi,E Tsur,MF Turner-Watson,I Ueda,P Vannerem,M Verzocchi,H Voss,J Vossebeld,D Waller,CP Ward,DR Ward,PM Watkins,AT Watson,NK Watson,PS Wells,T Wengler,N Wermes,D Wetterling,JS White,GW Wilson,JA Wilson,TR Wyatt,S Yamashita,V Zacek,D Zer-Zion

Physics letters B（2001）

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摘要

Searches for final states expected in models with light gravitinos have been performed, including experimental topologies with multi-leptons with missing energy, leptons and photons with missing energy, and jets and photons with missing energy. No excess over the expectations from the Standard Model has been observed. Limits are placed on production cross-sections in the different experimental topologies. Additionally, combining with searches for the anomalous production of lepton and photon pairs with missing energy, results are interpreted in the context of minimal models of gauge mediated SUSY breaking, Exclusion limits at the 95% confidence level on the supersymmetric particle masses of m((l) over tilde) > 83 GeV and m(<()over tilde>1)(0) > 85 GeV for tan beta = 2, and m(<()over tilde>), 69 GeV, m((e) over tilde,<()over tilde>) > 88 GeV and m(<()over tilde>1)(0) > 76 GeV for tan beta = 20, are established, (C) 2001 Elsevier Science B.V, All rights reserved.

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