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Search for charginos in e(+)e(-) interactions at root s=189 GeV

By Abreu P, Adam W, Adye T, Adzic P, Ajinenko I, Albrecht Z, Alderweireld T, Alekseev GD, Alemany R, Allmendinger T, Allport PP, Almehed S, Amaldi U, Amapane N, Amato S, Anassontzis EG, Andersson P, Andreazza A, Andringa S, Antilogus P, Apel WD, Arnoud Y, Asman B, Augustin JE, Augustinus A, Baillon P, Bambade P, Barao F, Barbiellini G, Barbier R, Bardin DY, Barker G, Baroncelli A, Battaglia M, Baubillier M, Becks KH, Begalli M, Behrmann A, Beilliere P, Belokopytov Y, Benekos NC, Benvenuti AC, Berat C, Berggren M, Bertrand D, Besancon M, Bigi M, Bilenky MS, Bizouard MA, Bloch D, Blom HM, Bonesini M, Boonekamp M, Booth PSL, Borgland AW, Borisov G, Bosio C, Botner O, Boudinov E, Bouquet B, Bourdarios C, Bowcock TJV, Boyko I, Bozovic I, Bozzo M, Bracko M, Branchini P, Brenner RA, Bruckman P, Brunet JM, Bugge L, Buran T, Buschbeck B, Buschmann P, Cabrera S, Caccia M, Calvi M, Camporesi T, Canale V, Carena F, Carroll L, Caso C, Gimenez MVC, Cattai A, Cavallo FR, Chabaud V, Charpentier P, Checchia P, Chelkov GA, Chierici R, Chliapnikov P, Chochula P, Chorowicz V, Chudoba J, Cieslik K, Collins P, Contri R, Cortina E, Cosme G, Cossutti F, Crawley HB, Crennell D, Crepe S, Crosetti G, Maestro JC, Czellar S, Davenport M, Da Silva W, Della Ricca G, Delpierre P, Demaria N, De Angelis A, De Boer W, De Clercq C, De Lotto B, De Min A, De Paula L, Dijkstra H, Di Ciaccio L, Dolbeau J, Doroba K, Dracos M, Drees J, Dris M, Duperrin A, Durand JD, Eigen G, Ekelof T, Ekspong G, Ellert M, Elsing M, Engel JP, Santo ME, Fanourakis G, Fassouliotis D, Fayot J, Feindt M, Ferrer A, Ferrer-Ribas E, Ferro F, Fichet S, Firestone A, Flagmeyer U, Foeth H, Fokitis E, Fontanelli F, Franek B, Frodesen AG, Fruhwirth R, Fulda-Quenzer F, Fuster J, Galloni A, Gamba D, Gamblin S, Gandelman M, Garcia C, Gaspar C, Gaspar M, Gasparini U, Gavillet P, Gazis EN, Gele D, Geralis T, Gerdyukov L, Ghodbane N, Gil I, Glege F, Gokieli R, Golob B, Gomez-Ceballos G, Goncalves P, Caballero IG, Gopal G, Gorn L, Gouz Y, Gracco V, Grahl J, Graziani E, Gris P, Grosdidier G, Grzelak K, Guy J, Haag C, Hahn F, Hahn S, Haider S, Hallgren A, Hamacher K, Hansen J, Harris FJ, Hedberg V, Heising S, Hernandez JJ, Herquet P, Herr H, Hessing TL, Heuser JM, Higon E, Holmgren SO, Holt PJ, Hoorelbeke S, Houlden M, Hrubec J, Huber M, Huet K, Hughes GJ, Hultqvist K, Jackson JN, Jacobsson R, Jalocha P, Janik R, Jarlskog C, Jarlskog G, Jarry P, Jean-Marie B, Jeans D, Johansson EK, Jonsson P, Joram C, Juillot P, Jungermann L, Kapusta F, Karafasoulis K, Katsanevas S, Katsoufis EC, Keranen R, Kernel G, Kersevan BP, Khokhlov Y, Khomenko BA, Khovanski NN, Kiiskinen A, King B, Kinvig A, Kjaer NJ, Klapp O, Klein H, Kluit P, Kokkinias P, Kostioukhine V, Kourkoumelis C, Kouznetsov O, Krammer M, Kriznic E, Krumstein Z, Kubinec P, Kurowska J, Kurvinen K, Lamsa JW, Lane DW, Laugier JP, Lauhakangas R, Leder G, Ledroit F, Lefebure V, Leinonen L, Leisos A, Leitner R, Lenzen G, Lepeltier V, Lesiak T, Lethuillier M, Libby J, Liebig W, Liko D, Lipniacka A, Lippi I, Loerstad B, Loken JG, Lopes JH, Lopez JM, Lopez-Fernandez R, Loukas D, Lutz P, Lyons L, MacNaughton J, Mahon JR, Maio A, Malek A, Malmgren TGM, Maltezos S, Malychev V, Mandl F, Marco J, Marco R, Marechal B, Margoni M, Marin JC, Mariotti C, Markou A, Martinez-Rivero C, Martinez-Vidal F, Garcia SMI, Masik F, Mastroyiannopoulos N, Matorras F, Matteuzzi C, Matthiae G, Mazzucato F, Mazzucato M, Mc Cubbin M, Mc Kay R, Mc Nulty R, Mc Pherson G, Meroni C, Meyer WT, Migliore E, Mirabito L, Mitaroff WA, Mjoernmark U, Moa T, Moch M, Moeller R, Moenig K, Monge MR, Moraes D, Moreau X, Morettini P, Morton G, Mueller U, Muenich K, Mulders M, Mulet-Marquis C, Muresan R, Murray WJ, Muryn B, Myatt G, Myklebust T, Naraghi F, Nassiakou M, Navarria FL, Navas S, Nawrocki K, Negri P, Neufeld N, Nicolaidou R, Nielsen BS, Niezurawski P, Nikolenko M, Nomokonov V, Nygren A, Obraztsov V, Olshevski AG, Onofre A, Orava R, Orazi G, Osterberg K, Ouraou A, Paganoni M, Paiano S, Pain R, Paiva R, Palacios J, Palka H, Papadopoulou TD, Pape L, Parkes C, Parodi F, Parzefall U, Passeri A, Passon O, Pavel T, Pegoraro M, Peralta L, Pernicka M, Perrotta A, Petridou C, Petrolini A, Phillips HT, Pierre F, Pimenta M, Piotto E, Podobnik T, Pol ME, Polok G, Poropat P, Pozdniakov V, Privitera P, Pukhaeva N, Pullia A, Radojicic D, Ragazzi S, Rahmani H, Rames J, Ratoff PN, Read AL, Rebecchi P, Redaelli NG, Regler M, Rehn J, Reid D, Reinhardt R, Renton PB, Resvanis LK, Richard F, Ridky J, Rinaudo G, Ripp-Baudot I, Rohne O, Romero A, Ronchese P, Rosenberg EI, Rosinsky P, Roudeau P, Rovelli T, Royon C, Ruhlmann-Kleider V, Ruiz A, Saarikko H, Sacquin Y, Sadovsky A, Sajot G, Salt J, Sampsonidis D, Sannino M, Schwemling P, Schwering B, Schwickerath U, Scuri F, Seager P, Sedykh Y, Segar AM, Seibert N, Sekulin R, Shellard RC, Siebel M, Simard L, Simonetto F, Sisakian AN, Smadja G, Smirnov N, Smirnova O, Smith GR, Sokolov A, Sopczak A, Sosnowski R, Spassov T, Spiriti E, Squarcia S, Stanescu C, Stanic S, Stanitzki M, Stevenson K, Stocchi A, Strauss J, Strub R, Stugu B, Szczekowski M, Szeptycka M, Tabarelli T, Taffard A, Tchikilev O, Tegenfeldt F, Terranova F, Thomas J, Timmermans J, Tinti N, Tkatchev LG, Tobin M, Todorova S, Tomaradze A, Tome B, Tonazzo A, Tortora L, Tortosa P, Transtromer G, Treille D, Tristram G, Trochimczuk M, Troncon C, Turluer ML, Tyapkin IA, Tyapkin P, Tzamarias S, Ullaland O, Uvarov V, Valenti G, Vallazza E, Vander Velde C, Van Dam P, Van den Boeck W, Van Doninck WK, Van Eldik J, Van Lysebetten A, van Remortel N, Van Vulpen I, Vegni G, Ventura L, Venus W, Verbeure F, Verdier P, Verlato M, Vertogradov LS, Verzi V, Vilanova D, Vitale L, Vlasov E, Vodopyanov AS, Voulgaris G, Vrba V, Wahlen H, Walck C, Washbrook AJ, Weiser C, Wicke D, Wickens JH, Wilkinson GR, Winter M, Witek M, Wolf G, Yi J, Yushchenko O, Zalewska A, Zalewski P, Zavrtanik D, Zevgolatakos E, Zimin NI, Zintchenko A, Zoller P, Zucchelli GC and Zumerle G

Abstract

An update of the searches for charginos and gravitinos is presented, based on a data sample corresponding to the 158 pb(-1) recorded by the DELPHI detector in 1998, at a centre-of-mass energy of 189 GeV. No evidence for a signal was found. The lower mass limits are 4-5 GeV/c(2) higher than those obtained at a centre-of-mass energy of 183 GeV. The (mu, M-2) MSSM domain excluded by combining the chargino searches with neutralino searches at the Z resonance implies a limit on the mass of the lightest neutralino which, for a heavy sneutrino, is constrained to be above 31.0 GeV/c(2) for tan beta greater than or equal to 1. (C) 2000 Elsevier Science B.V. All rights reserved

Publisher: 'Elsevier BV'
Year: 2000
DOI identifier: 10.1016/S0370-2693(00)00313-0
OAI identifier: oai:air.uniud.it:11390/879393
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