CERN Accelerating science

Article
Report number hep-ex/9803019 ; CERN-EP-98-029 ; CERN-EP-98-029
Title A search for neutral Higgs bosons in the MSSM and models with two scalar field doublets
Related titleMinimal Supersymmetric Standard Model
Author(s)

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

Affiliation (School of Physics and Astronomy, Univ. Birmingham) ; (Dipartimento di Fisica dell' Univ. di Bologna and INFN, Bologna) ; (Physikalisches Institut, Univ. Bonn) ; (Department of Physics, Univ. California, Riverside) ; (Cavendish Laboratory, Cambridge) ; (Ottawa-Carleton Institute for Physics, Univ. Carleton, Carleton) ; (Centre for Research in Particle Physics, Univ. Carleton, Carleton) ; (CERN) ; (Enrico Fermi Institute, Chicago) ; (Fakultät für Physik, Albert Ludwigs Univ., Freiburg) ; (Physikalisches Inst., Univ. Heidelberg, Heidelberg) ; (Department of Physics, Indiana Univ., Blooming) ; (Queen Mary and Westfield College, Univ. of London, London) ; (Technische Hochschule Aachen, III Physikalisches Inst., Aachen) ; (Univ. College London, London) ; (Department of Physics, Schuster Laboratory, Manchester) ; (Department of Physics, Univ. Maryland, College Park) ; (Lab. de Physique Nucl., Univ. Montreal, Montreal) ; (Department of Physics, Univ. Oregon, Eugene) ; (Rutherford Appleton Lab., Chilton, Didcot) ; (Department of Physics, Technion-Israel Inst. of Technology, Haifa) ; (Department of Physics and Astronomy, Tel Aviv Univ., Tel Aviv) ; (Int. Centre for Elementary Part. Phys. and Depart. of Phys., Univ. Tokyo, Tokyo) ; (Kobe University, Kobe) ; (Brunel University, Uxbridge) ; (Particle Physics Depart., Weizmann Institute of Science, Rehovot) ; (Univ. Hamburg/DESY, II Institut für Experimental Physik, Hamburg) ; (Univ. Victoria, Department of Physics, Victoria) ; (Univ. British Columbia, Department of Physics, Vancouver) ; (Univ. Alberta, Department of Physics, Edmonton) ; (Duke Univ., Dept of Physics, Durham) ; (Research Inst. for Particle and Nuclear Physics, Budapest) ; (Inst. of Nuclear Research, Debrecen) ; (Ludwigs-Maximilians-Univ., München)
Publication 1998
Imprint 20 Feb 1998
Number of pages 39
Note 40 pages, LaTeX, uses a4p.sty, 13 eps figures included, submitted to Eur. Phys. J. C Report-no: CERN-EP/98-029
In: Eur. Phys. J. C 5 (1998) 19-40
DOI 10.1007/s100520050245
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LEP ; OPAL
Abstract A search is described for the neutral Higgs bosons h^0 and A^0 predicted by models with two scalar field doublets and, in particular, the Minimal Supersymmetric Standard Model (MSSM). The search in the Z^0 h^0 and h^0 A^0 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 Z^0 resonance to set limits on m_h and m_A in general models with two scalar field doublets and in the MSSM. For example, in the MSSM, for tan(beta) > 1, minimal and maximal scalar top quark mixing and soft SUSY-breaking masses of 1 TeV, the 95% confidence level limits m_h > 59.0 GeV and m_A > 59.5 GeV are obtained. For the first time, the MSSM parameter space is explored in a detailed scan.

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