A Search For Pair-Produced Charged Higgs Bosons In Z0 Decays

D Decamp,B Deschizeaux,C Goy,J P Lees,M N Minard,J M Crespo,M Delfino,E Fernandez,M Martinez,R Miquel,Ll M Mir,S Orteu,A Pacheco,J A Perlas,E Tubau,M G Catanesi,M De Palma,A Farilla,G Iaselli,G Maggi,S Natali,S Nuzzo,A Ranieri,G Raso,F Romano,F Ruggieri,G Selvaggi,L Silvestris,P Tempesta,G Zito,Hong Hu,Desheng Huang,S Jin,Jian Lin,T Ruan,Tony Wang,W Wu,Y Xie,Dong Xu,R Xu,Jianwei Zhang, Zhentao Zhang, Weiguang Zhao,H Albrecht,W B Atwood,F Bird,E Blucher,T H Burnett,T Charity,H Drevermann,L Garrido,C Grab,R Hagelberg,S J Haywood,B Jost,M Kasemann,G Kellner,J Knobloch,A Lacourt,I Lehraus,T Lohse,D Luke,A Marchioro,P Mato,James May,A Minten,A Miotto,P Palazzi,M Pepealtarelli,F Ranjard,A Roth,J Rothberg,H Rotscheidt,W Von Ruden,R St Denis,D Schlatter,M Takashima,M Talby,H Taureg,W Tejessy,H Wachsmuth,S Wheeler,W Wiedenmann,W Witzeling,J Wotschack,Z Ajaltouni,M Bardadinotwinowska,A Falvard,P Gay,P Henrard,J Jousset,B Michel,J C Montret,D Pallin,P Perret,J Proriol,F Prulhiere,J R Hansen,P H Hansen,R Mollerud,G Petersen,E Simopoulou,A Vayaki,J Badier,A Blondel,G R Bonneaud,J Bourotte,F Braems,J C Brient,M A Ciocci,G Fouque,R Guirlet,A Rouge,M Rumpf,R Tanaka,H Videau,I Videau,D J Candlin,A Conti,G Parrini,M Corden,C Georgiopoulos,J H Goldman,Mitsuo Ikeda,John J Lannutti,David Alexander Levinthal,M Mermikides,L Sawyer,G Stimpfl,A Antonelli,R Baldini,G Bencivenni,G Bologna,F Bossi,P Campana,G Capon,V Chiarella,G De Ninno,B Dettorrepiazzoli,G Felici,P Laurelli,G Mannocchi,F Murtas,G P Murtas,G Nicoletti,P Picchi,P Zografou,B Altoon,O Boyle,A W Halley,I Ten Have,J L Hearns,I S Hughes,J G Lynch,W T Morton,C Raine,J M Scarr,K J Smith,A S Thompson,B Brandl,O Braun,R Geiges,C Geweniger,P Hanke,V Hepp,E E Kluge,Y Maumary,M Panter,A Putzer,B Rensch,Achim Stahl,K Tittel,M Wunsch,A T Belk,R Beuselinck,D M Binnie,W Cameron,M Cattaneo,P J Dornan,S Dugeay,R Forty,A M Greene,J F Hassard,S Patton,J K Sedgbeer,G N Taylor,I R Tomalin,A G Wright,P Girtler,D Kuhn,G Rudolph,C K Bowdery,T J Brodbeck,A J Finch,F Foster,Gregory J Hughes,N R Keemer,M Nuttall,B S Rowlingson,T Sloan,S W Snow,T Barczewski,L A T Bauerdick,K Kleinknecht,B Renk,S Roehn,H G Sander,M Schmelling,F Steeg,Jp Albanese,Jj Aubert,C Benchouk,A Bonissent,Delphine S Courvoisier,F Etienne,E Matsinos,S Papalexiou,P Payre,B Pietrzyk,Zhaoming Qian,W Blum,P W Cattaneo,G Cowan,B Dehning,H Dietl,M Fernandezbosman,D Hauff,Andreas Jahn,E Lange,G Lutjens,G Lutz,W Manner,Hg Moser,R Richter,A S Schwarz,R Settles,U Stiegler,U Stierlin,J Thomas,G Waltermann,V Bertin,G De Bouard,J Boucrot,O Callot,Xiaoming Chen,A Cordier,M Davier,G Ganis,J F Grivaz,P Heusse,P Janot,V Journe,D W Kim,J Lefrancois,A M Lutz,J J Veillet,F Zomer,S R Amendolia,G Bagliesi,G Batignani,L Bosisio,U Bottigli,C Bradaschia,I Ferrante,F Fidecaro,L Foa,E Focardi,F Forti,A Giassi,M A Giorgi,F Ligabue,A Lusiani,E B Mannelli,P S Marrocchesi,A Messineo,F Palla,G Sanguinetti,S Scapellato,J Steinberger,R Tenchini,G Tonelli,G Triggiani,J M Carter,M G Green,P V March,T Medcalf,M Saich,J A Strong,R M Thomas,T Wildish,D R Botterill,R W Clifft,T R Edgecock,M Edwards,S M Fisher,John T Harvey,T J Jones,P R Norton,D P Salmon,J C Thompson,B Blochdevaux,P Colas,C Klopfenstein,E Lancon,E Locci,S Loucatos,L Mirabito,E Monnier,P Perez,F Perrier,J Rander,J F Renardy,A Roussarie,J P Schuller,J G Ashman,C N Booth,F Combley,M Dinsdale,J P Martin, Dawn D Parker,L F Thompson,S Brandt,H Burkhardt,C Grupen,H Meinhard,E Neugebauer,U Schafer,H Seywerd,B Gobbo,F Liello,E Milotti,F Ragusa,L Rolandi,T Barklow,L Bellantoni,J Boudreau,D Cinabro,J Conway,D F Cowen,Z Feng,Y S Gao,J L Harton,J Hilgart,R C Jared,R P Johnson,B W Leclaire,Y B Pan,T Parker,J R Pater,Y Saadi,V Sharma,A M Walsh,J A Wear,F V Weber,Sau Lan Wu,S T Xue,G Zobernig

PHYSICS LETTERS B（1990）

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Abstract

A search for pair-produced charged Higgs bosons in decays of the Z0 has been performed using the ALEPH detector at LEP for the decay channels H+H− → ντντ, H+H− → ντ cs and H+H− → cs cs. Searches for two additional decay channels in which cs is replaced by cb were also performed. With 1.17 pb−1 of integrated luminosity, corresponding to about 25 000 hadronic decays of the Z0, the charged Higgs has been excluded at 95% CL in the mass range 7.6 to 43.0 GeV for BR[H± → ντ] = 100%, 8.3 to 40.6 GeV for BR[H±→ντ] = BR[H±→cs] = 50%, and 14.4 to 35.4 GeV for BR[H±→cs] = 100% . With cs replaced by cb, the charged Higgs has been excluded at 95% CL in the mass range 12.0 to 40.7 GeV for BR[H±→ντ] = BR[H±→cb] = 50%, and 16.2 to 35.7 GeV for BR[H±→cb] = 100%.

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Key words

higgs bosons,z0 decays,pair-produced

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