Abstract
A search for neutral Higgs bosons has been performed using the full sample of Z0 decays collected by the OPAL detector at LEP up to 1995. The data were taken at centre-of-mass energies between 88 GeV and 95 GeV and correspond to an integrated luminosity of approximately 160 pb-1. The present search addresses the processes Z0 → H0Z* and h0Z*, where H0 is the Higgs boson predicted by the Standard Model and h0 the lightest neutral scalar Higgs boson predicted in the framework of the Minimal Supersymmetric Standard Model. For the virtual Z0 boson, Z*, the following decay channels are considered: Z* → νν̄, e+e- and μ+μ-. Two candidate events have been found in the νν̄H0 channel and one in the μ+μ-H0 channel. Combined with earlier searches, the present search excludes the SM Higgs boson, at the 95% confidence level (CL), from the mass range below 59.6 GeV. In the framework of the Minimal Supersymmetric Standard Model, allowing a wide range of variation for most relevant model parameters, a 95% CL lower limit of 44.3 GeV is obtained for the mass of the h0 boson. Combined with earlier direct searches for the Higgs boson pair production process Z0 → h0A0 and with measurements of the Z0 line shape, a 95% CL lower limit of 23.5 GeV is obtained for the mass of the pseudoscalar Higgs boson A0, assuming tan β≥ 1.
| Original language | English |
|---|---|
| Pages (from-to) | 189-199 |
| Number of pages | 11 |
| Journal | Zeitschrift fur Physik C-Particles and Fields |
| Volume | 73 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1997 Jan |
| Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
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In: Zeitschrift fur Physik C-Particles and Fields, Vol. 73, No. 2, 01.1997, p. 189-199.
Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Search for neutral Higgs bosons in Z0 decays using the OPAL detector at LEP
AU - Alexander, G.
AU - Allison, J.
AU - Altekamp, N.
AU - Ametewee, K.
AU - Anderson, K. J.
AU - Anderson, S.
AU - Arcelli, S.
AU - Asai, S.
AU - Axen, D.
AU - Azuelos, G.
AU - Ball, A. H.
AU - Barberio, E.
AU - Barlow, R. J.
AU - Bartoldus, R.
AU - Batley, J. R.
AU - Bechtluft, J.
AU - Beeston, C.
AU - Behnke, T.
AU - Bell, A. N.
AU - Bell, K. W.
AU - Bella, G.
AU - Bentvelsen, S.
AU - Berlich, P.
AU - Bethke, S.
AU - Biebel, O.
AU - Blobel, V.
AU - Bloodworm, I. J.
AU - Bloomer, J. E.
AU - Bobinski, M.
AU - Bock, P.
AU - Bosch, H. M.
AU - Boutemeur, M.
AU - Bouwens, B. T.
AU - Braibant, S.
AU - Brown, R. M.
AU - Burckhart, H. J.
AU - Burgard, C.
AU - Bürgin, R.
AU - Capiluppi, P.
AU - Carnegie, R. K.
AU - Carter, A. A.
AU - Carter, J. R.
AU - Chang, C. Y.
AU - Charlesworth, C.
AU - Charlton, D. G.
AU - Chrisman, D.
AU - Chu, S. L.
AU - Clarke, P. E.L.
AU - Cohen, I.
AU - Conboy, J. E.
AU - Cooke, O. C.
AU - Cuffiani, M.
AU - Dado, S.
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AU - Dallavalle, G. M.
AU - De Jong, S.
AU - Del Pozo, L. A.
AU - Desch, K.
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AU - Do Couto E Silva, E.
AU - Doucet, M.
AU - Duchovni, E.
AU - Duckeck, G.
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AU - Edwards, J. E.G.
AU - Estabrooks, P. G.
AU - Evans, H. G.
AU - Evans, M.
AU - Fabbri, F.
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AU - Fiedler, F.
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AU - Foucher, M.
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AU - Gaidot, A.
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AU - Geddes, N. I.
AU - Geich-Gimbel, C.
AU - Gentit, F. X.
AU - Geralis, T.
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AU - Giacomelli, R.
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AU - Gibson, W. R.
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AU - Goldberg, J.
AU - Goodrick, M. J.
AU - Gorn, W.
AU - Grandi, C.
AU - Gross, E.
AU - Gruwé, M.
AU - Hajdu, C.
AU - Hanson, G. G.
AU - Hansroul, M.
AU - Hapke, M.
AU - Hargrove, C. K.
AU - Hart, P. A.
AU - Hartmann, C.
AU - Hauschild, M.
AU - Hawkes, C. M.
AU - Hawkings, R.
AU - Hemingway, R. J.
AU - Herten, G.
AU - Heuer, R. D.
AU - Hildreth, M. D.
AU - Hill, J. C.
AU - Hillier, S. J.
AU - Hilse, T.
AU - Hobson, P. R.
AU - Homer, R. J.
AU - Honma, A. K.
AU - Horváth, D.
AU - Howard, R.
AU - Hughes-Jones, R. E.
AU - Hutchcroft, D. E.
AU - Igo-Kemenes, P.
AU - Imrie, D. C.
AU - Ingram, M. R.
AU - Ishii, K.
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AU - Jeffreys, P. W.
AU - Jeremie, H.
AU - Jimack, M.
AU - Joly, A.
AU - Jones, C. R.
AU - Jones, G.
AU - Jones, M.
AU - Jones, R. W.L.
AU - Jost, U.
AU - Jovanovic, P.
AU - Junk, T. R.
AU - Karlen, D.
AU - Kawagoe, K.
AU - Kawamoto, T.
AU - Keeler, R. K.
AU - Kellogg, R. G.
AU - Kennedy, B. W.
AU - King, B. J.
AU - Kirk, J.
AU - Kluth, S.
AU - Kobayashi, T.
AU - Kobel, M.
AU - Koetke, D. S.
AU - Kokott, T. P.
AU - Kolrep, M.
AU - Komamiya, S.
AU - Kowalewski, R.
AU - Kress, T.
AU - Krieger, P.
AU - Von Krogh, J.
AU - Kyberd, P.
AU - Lafferty, G. D.
AU - Lafoux, H.
AU - Lahmann, R.
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AU - Lanske, D.
AU - Lauber, J.
AU - Lautenschlager, S. R.
AU - Layter, J. G.
AU - Lazic, D.
AU - Lee, A. M.
AU - Lefebvre, E.
AU - Lellouch, D.
AU - Letts, J.
AU - Levinson, L.
AU - Lewis, C.
AU - Lloyd, S. L.
AU - Loebinger, F. K.
AU - Long, G. D.
AU - Losty, M. J.
AU - Ludwig, J.
AU - Malik, A.
AU - Mannelli, M.
AU - Marcellini, S.
AU - Markus, C.
AU - Martin, A. J.
AU - Martin, J. P.
AU - Martinez, G.
AU - Mashimo, T.
AU - Matthews, W.
AU - Mättig, P.
AU - McDonald, W. J.
AU - McKenna, J.
AU - Mckigney, E. A.
AU - McMahon, T. J.
AU - McNab, A. I.
AU - McPherson, R. A.
AU - Meijers, F.
AU - Menke, S.
AU - Merritt, F. S.
AU - Mes, H.
AU - Meyer, J.
AU - Michelini, A.
AU - Mikenberg, G.
AU - Miller, D. J.
AU - Mir, R.
AU - Mohr, W.
AU - Montanari, A.
AU - Mori, T.
AU - Morii, M.
AU - Müller, U.
AU - Nagai, K.
AU - Nakamura, I.
AU - Neal, H. A.
AU - Nellen, B.
AU - Nijjhar, B.
AU - Nisius, R.
AU - O'Neale, S. W.
AU - Oakham, F. G.
AU - Odorici, F.
AU - Ogren, H. O.
AU - Omori, T.
AU - Oreglia, M. J.
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AU - Pálinkas, J.
AU - Pásztor, G.
AU - Pater, J. R.
AU - Patrick, G. N.
AU - Patt, J.
AU - Pearce, M. J.
AU - Petzold, S.
AU - Pfeifenschneider, P.
AU - Pilcher, J. E.
AU - Pinfold, J.
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AU - Poffenberger, P.
AU - Poli, B.
AU - Posthaus, A.
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AU - Rigby, D.
AU - Robins, S. A.
AU - Rodning, N.
AU - Roney, J. M.
AU - Rooke, A.
AU - Ros, E.
AU - Rossi, A. M.
AU - Rosvick, M.
AU - Routenburg, P.
AU - Rozen, Y.
AU - Runge, K.
AU - Runolfsson, O.
AU - Ruppel, U.
AU - Rust, D. R.
AU - Rylko, R.
AU - Sachs, K.
AU - Sarkisyan, E. K.G.
AU - Sasaki, M.
AU - Sbarra, C.
AU - Schaile, A. D.
AU - Schaile, O.
AU - Scharf, F.
AU - Scharff-Hansen, P.
AU - Schenk, P.
AU - Schmitt, B.
AU - Schmitt, S.
AU - Schröder, M.
AU - Schultz-Coulon, H. C.
AU - Schulz, M.
AU - Schumacher, M.
AU - Schütz, P.
AU - Scott, W. G.
AU - Shears, T. G.
AU - Shen, B. C.
AU - Shepherd-Themistocleous, C. H.
AU - Sherwood, P.
AU - Siroli, G. P.
AU - Sittler, A.
AU - Skillman, A.
AU - Skuja, A.
AU - Smith, A. M.
AU - Smith, T. J.
AU - Snow, G. A.
AU - Sobie, R.
AU - Söldner-Rembold, S.
AU - Springer, R. W.
AU - Sproston, M.
AU - Stahl, A.
AU - Starks, M.
AU - Steiert, M.
AU - Stephens, K.
AU - Steuerer, J.
AU - Stockhausen, B.
AU - Strom, D.
AU - Strumia, F.
AU - Szymanski, P.
AU - Tafirout, R.
AU - Talbot, S. D.
AU - Tanaka, S.
AU - Taras, P.
AU - Tarem, S.
AU - Tecchio, M.
AU - Thiergen, M.
AU - Thomson, M. A.
AU - Von Törne, E.
AU - Towers, S.
AU - Tsukamoto, T.
AU - Tsur, E.
AU - Turcot, A. S.
AU - Turner-Watson, M. F.
AU - Utzat, P.
AU - Van Kooten, R.
AU - Vasseur, G.
AU - Verzocchi, M.
AU - Vikas, P.
AU - Vincier, M.
AU - Vokurka, E. H.
AU - Wäckerle, F.
AU - Wagner, A.
AU - Ward, C. P.
AU - Ward, D. R.
AU - Ward, J. J.
AU - Watkins, P. M.
AU - Watson, A. T.
AU - Watson, N. K.
AU - Weber, P.
AU - Wells, P. S.
AU - Wermes, N.
AU - White, J. S.
AU - Wilkens, B.
AU - Wilson, G. W.
AU - Wilson, J. A.
AU - Wolf, G.
AU - Wotton, S.
AU - Wyatt, T. R.
AU - Yamashita, S.
AU - Yekutieli, G.
AU - Zacek, V.
N1 - Funding Information: Acknowledgements. We would like to acknowledge the help of Francesca Borzumati for clarifying some rather involved aspects of the MSSM parameter space. We particularly wish to thank also the SL Division for the efficient operation of the LEP accelerator and for their continuing close co-operation with our experimental group.In addition to the support staff at our own institutions we are pleased to acknowledge the Department of Energy, USA, National Science Foundation, USA, Particle Physics and Astronomy Research Council, UK, Natural Sciences and Engineering Research Council, Canada, Israel Ministry of Science, Israel Science Foundation, administered by the Israel Academy of Science and Humanities, Minerva Gesellschaft, Japanese Ministry of Education, Science and Culture (the Monbusho) and a grant under the Monbusho International Science Research Program,German Israeli Bi-national Science Foundation (GIF), Direction des Sciences de la Matière du Commissariat à l’Energie Atomique, France, Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie, Germany, National Research Council of Canada, Hungarian Foundation for Scientific Research, OTKA T-016660.
PY - 1997/1
Y1 - 1997/1
N2 - A search for neutral Higgs bosons has been performed using the full sample of Z0 decays collected by the OPAL detector at LEP up to 1995. The data were taken at centre-of-mass energies between 88 GeV and 95 GeV and correspond to an integrated luminosity of approximately 160 pb-1. The present search addresses the processes Z0 → H0Z* and h0Z*, where H0 is the Higgs boson predicted by the Standard Model and h0 the lightest neutral scalar Higgs boson predicted in the framework of the Minimal Supersymmetric Standard Model. For the virtual Z0 boson, Z*, the following decay channels are considered: Z* → νν̄, e+e- and μ+μ-. Two candidate events have been found in the νν̄H0 channel and one in the μ+μ-H0 channel. Combined with earlier searches, the present search excludes the SM Higgs boson, at the 95% confidence level (CL), from the mass range below 59.6 GeV. In the framework of the Minimal Supersymmetric Standard Model, allowing a wide range of variation for most relevant model parameters, a 95% CL lower limit of 44.3 GeV is obtained for the mass of the h0 boson. Combined with earlier direct searches for the Higgs boson pair production process Z0 → h0A0 and with measurements of the Z0 line shape, a 95% CL lower limit of 23.5 GeV is obtained for the mass of the pseudoscalar Higgs boson A0, assuming tan β≥ 1.
AB - A search for neutral Higgs bosons has been performed using the full sample of Z0 decays collected by the OPAL detector at LEP up to 1995. The data were taken at centre-of-mass energies between 88 GeV and 95 GeV and correspond to an integrated luminosity of approximately 160 pb-1. The present search addresses the processes Z0 → H0Z* and h0Z*, where H0 is the Higgs boson predicted by the Standard Model and h0 the lightest neutral scalar Higgs boson predicted in the framework of the Minimal Supersymmetric Standard Model. For the virtual Z0 boson, Z*, the following decay channels are considered: Z* → νν̄, e+e- and μ+μ-. Two candidate events have been found in the νν̄H0 channel and one in the μ+μ-H0 channel. Combined with earlier searches, the present search excludes the SM Higgs boson, at the 95% confidence level (CL), from the mass range below 59.6 GeV. In the framework of the Minimal Supersymmetric Standard Model, allowing a wide range of variation for most relevant model parameters, a 95% CL lower limit of 44.3 GeV is obtained for the mass of the h0 boson. Combined with earlier direct searches for the Higgs boson pair production process Z0 → h0A0 and with measurements of the Z0 line shape, a 95% CL lower limit of 23.5 GeV is obtained for the mass of the pseudoscalar Higgs boson A0, assuming tan β≥ 1.
UR - http://www.scopus.com/inward/record.url?scp=0000716793&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000716793&partnerID=8YFLogxK
U2 - 10.1007/s002880050309
DO - 10.1007/s002880050309
M3 - Article
AN - SCOPUS:0000716793
SN - 0170-9739
VL - 73
SP - 189
EP - 199
JO - Zeitschrift fur Physik C-Particles and Fields
JF - Zeitschrift fur Physik C-Particles and Fields
IS - 2
ER -