Search for charged Higgs bosons at LEP 2
P Abreu,Valery Pozdnyakov, K Nawrocki,B Jeanmarie,J Van Eldik,U Mjornmark,C Bosio,D Crennell,N I Zimine, A Augustinus,E K Johansson, R Nicolaidou,R Barbier,S Heising, P Adzic,S Fichet, P Chochula,F Parodi, G Vegni,Sergio Navas, A Ouraou,Rafael Marco,S Ragazzi, Jan Timmermans,K Cieslik, D Radojicic,M Nassiakou,N J Kjaer,N Neufeld, L Pape,G Smadja, G D Alekseev,J Dolbeau,V Kostioukhine,P Roudeau, E Vlasov, G Valenti,G Grosdidier,S Amato, M Houlden,Jose Salt,P Herquet,G Rinaudo, A W Borgland,O Klapp, O Rohne,D Bertini,B Buschbeck,W Mitaroff,J Kurowska,J Ridky,Z Krumshtein,A De Min, F Scuri,B De Lotto,H Saarikko, I Boyko,A Zalewska, V Hedberg,Yu Belokopytov,W De Boer,I Bozovic, D Treille,S Katsanevas, K H Becks,T Tabarelli,R Strub,E N Gazis, C Petridou,H M Blom,O Yushchenko,A B Fenyuk, F Glege,M Mccubbin,J Guy,Ph Gavillet,M Szczekowski,A S Vodopianov,J Cuevas Maestro,A Kinvig,W Venus, Jungyu Yi,A Sadovsky, C Caso, D Fassouliotis,Ronald D G Mckay,Th D Papadopoulou,O Smirnova,R Janik, N Redaelli,R Sekulin, S Nemecek,F J Harris,S Paiano,G R Smith, D Gele,S Creperenaudin,M Battaglia,X Moreau,G Ekspong,A N Sisakian,V Malychev,J P Laugier,M Elsing, P Shlyapnikov,T L Hessing, Carlos A E Garcia,A G Frodesen,Predrag S Krstic,A Leisos,J H Wickens,H T Phillips, M Pegoraro, W Adam, K Doroba,P Antilogus,Enrico Graziani,Alicia Romero,M Bonesini,L Di Ciaccio, F Verbeure,I Van Vulpen,T Lesiak, P Kluit,F Fuldaquenzer,M A E Schyns,J Heuser,F Hahn,E C Katsoufis,Klaus Monig,B A Khomenko,A Malek,E Higon,F Pierre,M Chapkin, M Margoni,S Haider, M S Bilenky, J Marco, G Sajot,B Tome,T Rovelli,M Caccia,T Adye, W T Meyer,J Chudoba,Y Arnoud, C Royon,B Lorstad, S O Holmgren, R Chierici, R Fruhwirth,M Koratzinos,B Bouquet, Piet Van Dam,Y Sacquin,J C Marin, A L Read,M C Espirito Santo,F Mazzucato, C Bourdarios,P Buschmann,N Van Remortel, R Orava,J Libby, M Mazzucato,N Demaria, A Stocchi,L Peralta, B Asman, T Camporesi,A Duperrin,R Contri,N Pukhaeva,P J Holt,S Hahn,G W Morton,R Alemany,M Dracos,S Tzamarias,V Nomokonov, D Vilanova,A Passeri,V Lefebure,G Transtromer,I Gonzalez Caballero,Hugh M Herr,G Cosme, D Wicke,F Martinezvidal,B P Kersevan, R Gokieli,S Gamblin,F Naraghi,G Leder,E Vallazza, R Brenner,T Brenke,Philippe Schwemling,P Rosinsky,Sofia Andringa,J M Brunet,Tz Spassoff,W D Apel,K Belous,C Berat,E Fokitis,F Ledroit, F Carena, C Mariotti,E Piotto,B Erzen,C Stanescu,G Fanourakis,F Matorras,A Sopczak,Z Albrecht,G Polok,E Ferrerribas,M Szeptycka,R Jacobsson,L Tortora, C Joram, D Bloch,H Palka,T Myklebust,F Ferro,P Renton,V Ruhlmannkleider,D Yu Bardin,P Andersson,Oleg A Kuznetsov, M Dris, P N Ratoff,U Muller,P Seager, M Mulders, P Morettini, F Simonetto,V Lepeltier,C Martinezrivero,S Marti I Garcia,A Kiiskinen,A Deghorain,Ph Charpentier,A Tonazzo,S Hoorelbeke,R Moller, G Barbiellini,R Reinhardt,S Stanic,S Todorova,Yu Gouz,A Sokolov,A Nygren,M Regler,L Vitale,P Poropat,H Dijkstra, A Tsirou, W Bonivento,J Fayot,N Vassilopoulos, V Canale,J D Hansen,K Kurvinen, C Matteuzzi,D W 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PHYSICS LETTERS B（1999）
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摘要
A search for pair produced charged Higgs bosons has been performed in the high energy data collected by DELPHI at LEP with root s = 161, 172 and 183 GeV. The analysis uses the tau nu tau nu, c (s) over bar tau nu and c<(sc)over bar>s final states and a combination of event shape variables, di-jet masses and jet flavour tagging for the separation of a possible signal from the dominant W+W- and QCD backgrounds. The number of selected events has been found to be compatible with the expected background. The lower excluded value of the H+/- mass obtained by varying the H+/---> hadrons decay branching ratio has been found to be 56.3 GeV/c(2). (C) 1999 Published by Elsevier Science B.V. All rights reserved.
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