Search for Invisible Higgs Boson Decays in E+e− Collisions at Centre-of-mass Energies Up to 184 GeV

R Barate,D Decamp,P Ghez,C Goy,S Jezequel,JP Lees,F Martin,E Merle,MN Minard,JY Nief,B Pietrzyk,R Alemany,MP Casado,M Chmeissani,JM Crespo,M Delfino,E Fernandez,M Fernandez-Bosman,L Garrido,E Grauges,A Juste,M Martinez,G Merino,R Miquel,LM Mir,P Morawitz,A Pacheco,IC Park,A Pascual,I Riu,F Sanchez,A Colaleo,D Creanza,M de Palma,G Gelao,G Iaselli,G Maggi,M Maggi,S Nuzzo,A Ranieri,G Raso,F Ruggieri,G Selvaggi,L Silvestris,P Tempesta,A Tricomi,G Zito,X Huang,J Lin,Q Ouyang,T Wang,Y Xie,R Xu,S Xue, J Zhang, L Zhang,W Zhao,D Abbaneo,U Becker,G Boix,M Cattaneo,V Ciulli,G Dissertori,H Drevermann,RW Forty,M Frank,F Gianotti,AW Halley,JB Hansen,J Harvey,P Janot,B Jost, L Lehraus,O Leroy,C Loomis,P Maley,P Mato,A Minten,A Moutoussi,F Ranjard, L Rolandi,D Rousseau,D Schlatter,M Schmitt,O Schneider,W Tejessy,F Teubert,IR Tomalin,E Tournefier,M Vreeswijk,AE Wright,Z Ajaltouni,F Badaud,G Chazelle,O Deschamps,S Dessagne,A Falvard,C Ferdi,P Gay,C Guicheney,P Henrard,J Jousset,B Michel,S Monteil,JC Montret, D Pallin,P Perret,F Podlyski,JD Hansen,JR Hansen,PH Hansen,BS Nilsson,B Rensch,A Waananen,G Daskalakis, A Kyriakis,C Markou,E Simopoulou,A Vayaki,A Blondel,JC Brient,F Machefert,A Rouge,M Swynghedauw,R Tanaka,A Valassi,H Videau,E Focardi,G Parrini,K Zachariadou,R Cavanaugh,M Corden,C Georgiopoulos,A Antonelli,G Bencivenni,G Bologna,F Bossi,P Campana,G Capon,F Cerutti,V Chiarella,P Laurelli, G Mannocchi,F Murtas,GP Murtas,L Passalacqua,M Pepe-Altarelli,M Chalmers,L Curtis,JG Lynch,P Negus,V O'Shea,B Raeven,C Raine,D Smith,P Teixeira-Dias,AS Thompson,JJ Ward,O Buchmuller,S Dhamotharan,C Geweniger,P Hanke, G Hansper,V Hepp,EE Kluge,A Putzer,J Sommer,K Tittel,S Werner,M Wunsch,R Beuselinck,DM Binnie,W Cameron,PJ Dornan,M Girone,S Goodsir,N Marinelli,EB Martin,J Nash,J Nowell,JK Sedgbeer,P Spagnolo,E Thomson,MD Williams,VM Ghete,P Girtler,E Kneringer,D Kuhn,G Rudolph,AP Betteridge,CK Bowdery,PG Buck, P Colrain,G Crawford,G Ellis,AJ Finch,F Foster,G Hughes,RWL Jones,NA Robertson,MI Williams,P van Gemmeren,I Giehl,F Holldorfer,C Hoffmann,K Jakobs,K Kleinknecht,M Krocker,HA Nurnberger,G Quast,B Renk,E Rohne, HG Sander,S Schmeling,H Wachsmuth,C Zeitnitz,T Ziegler,JJ Aubert,C Benchouk,A Bonissent,J Carr,P Coyle,A Ealet,D Fouchez,F Motsch,P Payre,M Talby,M Thulasidas,A Tilquin,M Aleppo,M Antonelli,F Ragusa,R Berlich,V Buscher,H Dietl,G Ganis,K Huttmann,G Lutjens,C Mannert,W Manner,HG Moser,S Schael,R Settles,H Seywerd,H Stenzel,W Wiedenmann,G Wolf,P Azzurri,J Boucrot,O Callot,S Chen,M Davier,L Duflot,JF Grivaz,P Heusse,A Jacholkowska,M Kado, J Lefrancois, L Serin,JJ Veillet,I Videau,JBD de Regie,D Zerwas,G Bagliesi,S Bettarini,T Boccali,C Bozzi,G Calderini,R Dell'Orso,I Ferrante,A Giassi,A Gregorio,F Ligabue,A Lusiani,PS Marrocchesi,A Messineo,F Palla,G Rizzo,G Sanguinetti, A Sciaba,G Sguazzoni,R Tenchini,C Vannini,A Venturi,PG Verdini,GA Blair,J Coles,G Cowan,MG Green,DE Hutchcroft,LT Jones,T Medcalf,JA Strong,JH von Wimmersperg-Toeller,DR Botterill,RW Clifft,TR Edgecock,PR Norton,JC Thompson,B Bloch-Devaux,P Colas,B Fabbro,G Faif,E Lancon,MC Lemaire,E Locci,P Perez, H Przysiezniak,J Rander,JF Renardy,A Rosowsky,A Trabelsi,B Tuchming,B Vallage,SN Black,JH Dann,HY Kim,N Konstantinidis,AM Litke,MA McNeil,G Taylor,CN Booth,S Cartwright,F Combley,PN Hodgson,MS Kelly,M Lehto,LF Thompson,K Affholderbach,A Bohrer,S Brandt,C Grupen,A Misiejuk,G Prange,U Sieler,G Giannini,B Gobbo,J Putz,J Rothberg,S Wasserbaech,RW Williams,SR Armstrong,E Charles,P Elmer,DPS Ferguson,Y Gao,S Gonzalez,TC Greening,OJ Hayes,H Hu,S Jin,PA McNamara,JM Nachtman,J Nielsen,W Orejudos,YB Pan,Y Saadi,IJ Scott,J Walsh,SL Wu,X Wu,G Zobernig

Physics letters B（1999）

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摘要

In a data sample of 78.3 pb(-1) collected in 1996 and 1997 by the ALEPH detector at centre-of-mass energies from 161 to 184 GeV, invisible decays of a Higgs boson have been searched for in the reaction e(+)e(-) --> hZ, where the Z can decay into e(+)e(-), mu(+) mu(-) or ". No evidence for a signal is found and limits on the production cross section are derived as a function of the Higgs boson mass. These results are combined with those obtained in an update of the analyses of the ALEPH data taken at LEP 1. For a production cross section equal to that of the minimal standard model Higgs boson, masses below 80 GeV/c(2) are excluded at 95% C.L. (C) 1999 Elsevier Science B.V. All rights reserved."

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