A Search for Neutral Higgs Bosons in the Mssm and Models with Two Scalar Field Doublets

K. Ackerstaff,G. Alexander,J. Allison,N. Altekamp,K. J. Anderson,S. Anderson,S. Arcelli,S. Asai, S. F. Ashby,D. Axen,G. Azuelos,A. H. Ball,E. Barberio,R. J. Barlow,R. Bartoldus,J. R. Batley,S. Baumann,J. Bechtluft,T. Behnke,K. W. Bell,G. Bella, S. Bentvelsen,S. Bethke,S. Betts,O. Biebel,A. Biguzzi,S. D. Bird,V. Blobel,I. J. Bloodworth,M. Bobinski,P. Bock,D. Bonacorsi,M. Boutemeur,S. Braibant,L. Brigliadori,R. M. Brown,H. J. Burckhart,C. Burgard,R. Bürgin,P. Capiluppi,R. K. Carnegie,A. A. Carter,J. R. Carter, C. Y. Chang,D. G. Charlton,D. Chrisman, P. E. L. Clarke,I. Cohen,J. E. Conboy,O. C. Cooke,C. Couyoumtzelis, R. L. Coxe,M. Cuffiani,S. Dado,C. Dallapiccola,G. M. Dallavalle,R. Davis,S. de Jong,L. A. del Pozo,A. de Roeck,K. Desch,B. Dienes,M. S. Dixit,M. Doucet, E. Dnchovni,G. Duckeck,I. P. Duerdoth,D. Eatough,P. G. Estabrooks,E. Etzion,H. G. Evans,M. Evans,F. Fabbri,A. Fanfani, M. Fanti,A. A. Faust,L. Feld,F. Fiedler,M. Fierro,H. M. Fischer,I. Fleck,R. Folman,D. G. Fong,M. Foucher, A. Fiirtjes,D. I. Futyan,P. Gagnon,J. W. Gary,J. Gascon,S. M. Gascon-Shotkin,N. I. Geddes,C. Geich-Gimbel, T. Geralis,G. Giacomelli,P. Giacomelli,R. Giacomelli,V. Gibson,W. R. Gibson,D. M. Gingrich,D. Glenzinski,J. Goldberg, M. J. Goodrick,W. Gorn,C. Grandi,E. Gross,J. Grunhaus,M. Gruwé,C. Hajdu,G. G. Hanson,M. Hansroul, M. Hapke,C. K. Hargrove,P. A. Hart,C. Hartmann,M. Hauschild, C M. Hawkes,R. Hawkings,R. J. Hemingway, M. Hcrndon, G. Herten,R. D. Heuer,M. D. Hildreth,J. C. Hill,S. J. Hillier,P. R. Hobson,A. Hocker,R. J. Homer,A. K. Honma,D. Horvath,K. R. Hossain,R. Howard,P. Hüntemeyer,D. E. Hutchcroft,P. Igo-Kemenes, D. C. Imrie,K. Ishii, A. Jawahery,P. W. Jeffreys, H. Jeremie,M. Jimack,A. Joly,C. R. Jones,M. Jones,U. Jost,P. Jovanovic,T. R. Junk,J. Kanzaki,D. Karlen,V. Kartvelishvili,K. Kawagoe,T. Kawamoto, P. I. Kayal,R. K. Keeler,R. G. Kellogg,B. W. Kennedy,J. Kirk,A. Klier,S. Kluth,T. Kobayashi,M. Kobel,D. S. Koetke,T. P. Kokott,M. Kolrep,S. Komamiya,R. V. Kowalewski, T. Kress,P. Krieger,J. von Krogh,P. Kyberd,G. D. Lafferty,R. Lahmann,W. P. Lai,D. Lanske, J. Lauber,S. R. Lautenschlager,I. Lawson,J. G. Layter,D. Lazic, A. M. Lee,E. Lefebvre,D. Lellouch, J. Letts,L. Levinson,B. List,S. L. Lloyd,F. K. Loebinger,G. D. Long,M. J. Losty,J. Ludwig,D. Lui, A. Maechiolo,A. Macpherson,M. Mannelli, S. Marcellini,C. Markopoulos,C. Markus,A. J. Martin, J. P. Martin,G. Martinez,T. Mashimo,P. Mättig,W. J. McDonald,J. McKenna,E. A. Mckigney,T. J. McMahon,R. A. McPherson,F. Meijers, S. Menke,F. S. Merritt,H. Mes,J. Meyer,A. Michelini,S. Mihara,G. Mikenberg,D. J. Miller,A. Mincer,R. Mir,W. Mohr,A. Montanari, T. Mori,K. Nagai, I. Nakaumra,H. A. Neal,B. Nellen,R. Nisius, S. W. O’Neale,F. G. Oakham,F. Odorici,H. O. Ogren,A. Oh,N. J. Oldershaw,M. J. Oreglia,S. Orito,J. Pálinkás,G. Pásztor,J. R. Pater,G. N. Patrick,J. Patt,R. Perez-Ochoa,S. Petzold,P. Pfeifenschneider,J. E. Pilcher,J. Pinfold,D. E. Plane,P. Poffenberger, B. Poli,A. Posthaus,C. Rembser,S. Robertson,S. A. Robins,N. Rodning,J. M. Roney, A. Rooke,A. M. Rossi,P. Routenburg,Y. Rozen,K. Runge,O. Runolfsson,U. Ruppel,D. R. Rust,K. Sachs,T. Saeki,O. Sahr,W. M. Sang, E. K. G. Sarkisyan,C. Sbarra, A. D. Schalle,O. Schaile,F. Scharf,P. Scharff-Hansen, J. Schieck,P. Schleper,B. Schmitt,S. Schmitt,A. Schöning,M. Schröder,M. Schumacher,C. Schwick, W. G. Scott,T. G. Shears,B. C. Shen,C. H. Shepherd-Themistocleous,P. Sherwood,G. P. Siroli, A. Sittler, A. Skillman,A. Skuja,A. M. Smith, G. A. Snow,R. Sobie,S. Söldner-Rembold,R. W. Springer,M. Sproston,K. Stephens,J. Steuerer,B. Stockhausen,K. Stoll,D. Strom,R. Ströhmer,P. Szymanski,R. Tafirout,S. D. Talbot, P. Taras, S. Tarera,R. Teuscher,M. Thiergen,M. A. Thomson,E. von Törne,E. Torrence,S. Towers,I. Trigger,Z. Trocsányi,E. Tsur,A. S. Turcot,M. F. Turner-Watson,I. Ueda,P. Utzat, R. Van Koten,P. Vannerem,M. Verzocchi,P. Vikas,E. H. Vokurka,H. Voss,F. Wäckerle,A. Wagner,C. P. Ward,D. R. Ward,P. M. Watkins,A. T. Watson,N. K. Watson,P. S. Wells,N. Wermes,J. S. White,G. W. Wilson,J. A. Wilson,T. R. Wyatt,S. Yamashita,G. Yekutieli,V. Zacek,D. Zer-Zion

European physical journal C, Particles and fields（1998）

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摘要

A search is described for the neutral Higgs bosons h0 and A0 predicted by models with two scalar field doublets and, in particular, the Minimal Supersymmetric Standard Model (MSSM). The search in the Z0h0 and h0A0 production channels is based on data corresponding to an integrated luminosity of 25 pb−1 from e+e− collisions at centre-of-mass energies between 130 and 172 GeV collected with the OPAL detector at LEP. The observation of a number of candidates consistent with Standard Model background expectations is used in combination with earlier results from data collected at the Z0 resonance to set limits on mh and ma in general models with two scalar field doublets and in the MSSM. For example, in the MSSM, for tan β > 1, minimal and maximal scalar top quark mixing and soft SUSY-breaking masses of 1 TeV, the 95% confidence level limits mh > 59.0 GeV and ma > 59.5 GeV are obtained. For the first time, the MSSM parameter space is explored in a detailed scan.

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关键词

Higgs Boson,Neutral Higgs Boson,Opal Collaboration,Charged Track,Search Channel

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