Search for neutral MSSM Higgs bosons at LEP

The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric standard model (MSSM). The data of the four collaborations are statistically combined and examined for their consistency with the background hypothesi...

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Published in:The European physical journal. C, Particles and fields Particles and fields, 2006-09, Vol.47 (3), p.547-587, Article 547
Main Authors: Casado, M.P., Ouyang, Q., Xu, R., Abbaneo, D., Hutchcroft, D.E., Schlatter, D., Videau, I., Simopoulou, E., Parrini, G., Negus, P., Wasserbaech, S., Kluge, E.E., Dornan, P.J., Rutherford, S.A., Rudolph, G., Ellis, G., Hölldorfer, F., Renk, B., Curtil, C., Payre, P., Lütjens, G., Wolf, G., Veillet, J.-J., Green, M.G., Strong, J.A., Hodgson, P.N., Kile, J., Zobernig, G., Baroncelli, A., Benvenuti, A., Bertrand, D., Brunet, J.M., da Silva, T., Ellert, M., Espirito Santo, M.C., Herr, H., Kersevan, B.P., Lamsa, J., Lesiak, T., Liebig, W., Lipniacka, A., Martinez-Rivero, C., Mc Nulty, R., Myklebust, T., Pape, L., Passon, O., Polok, G., Rehn, J., Ruhlmann-Kleider, V., Tegenfeldt, F., Vilanova, D., Washbrook, A.J., Zalewska, A., Zavrtanik, D., Zimin, N.I., Aguilar-Benitez, M., Baksay, G., Basile, M., Bay, A., Burger, J.D., Colino, N., de la Cruz, B., Ferguson, T., Gupta, V.K., Gutay, L.J., Jin, B.N., Kienzle-Focacci, M.N., Koutsenko, V., Kräber, M., Kraemer, R.W., Ladron de Guevara, P., Lu, Y.S., Mirabelli, G., Paramatti, R., Spillantini, P., Swain, J.D., Szillasi, Z., Tang, X.W., Vogel, H., Weber, M., Yang, H.J., Amaral, P., Barberio, E., Behnke, T., Bock, P., Chang, C.Y., Dubbert, J., Hajdu, C., Heuer, R.D., Jeremie, H., Jost, U., Lafferty, G.D., Letts, J., Levinson, L., Mes, H., Pinfold, J., Poli, B., Thomson, M.A., Vértesi, R., Wilson, G.W.
Format: Article
Language:English
Subjects:
Bosons
Fysik
Higgs bosons
High Energy Physics - Experiment
Mathematical models
Natural Sciences
Naturvetenskap
Parameters
Physical Sciences
Physics
Standard model (particle physics)
Subatomic Physics
Subatomär fysik
Topology
Upper bounds
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Summary:The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric standard model (MSSM). The data of the four collaborations are statistically combined and examined for their consistency with the background hypothesis and with a possible Higgs boson signal. The combined LEP data show no significant excess of events which would indicate the production of Higgs bosons. The search results are used to set upper bounds on the cross-sections of various Higgs-like event topologies. The results are interpreted within the MSSM in a number of “benchmark” models, including CP-conserving and CP-violating scenarios. These interpretations lead in all cases to large exclusions in the MSSM parameter space. Absolute limits are set on the parameter cosβ and, in some scenarios, on the masses of neutral Higgs bosons.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s2006-02569-7