Search for the standard model Higgs boson at the LEP2 Collider near [formula omitted] GeV

During 1997 the ALEPH experiment at LEP gathered 57 pb −1 of data at centre-of-mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e +e −→HZ. No evidence of a signal is found in the data; seven events are...

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Published in:Physics letters. B 1999-02, Vol.447 (3), p.336-351
Main Authors: Lucotte, A., Martin, F., Casado, M.P., Fernandez, E., Merino, G., Sanchez, F., Iaselli, G., Nuzzo, S., Raso, G., Lin, J., Xue, S., Zhao, W., Cattaneo, M., Cerutti, F., Dissertori, G., Frank, M., Halley, A.W., Leroy, O., Mato, P., Schmitt, M., Vreeswijk, M., Badaud, F., Dessagne, S., Jousset, J., Michel, B., Pallin, D., Perret, P., Hansen, J.D., Kyriakis, A., Rumpf, M., Videau, H., Focardi, E., Corden, M., Huehn, T., Bossi, F., Capon, G., Mannocchi, G., Murtas, G.P., Curtis, L., Lynch, J.G., Scarr, J.M., Dhamotharan, S., Sommer, J., Werner, S., Binnie, D.M., Cameron, W., Nash, J., Williams, M.D., Kneringer, E., Colrain, P., Williams, M.I., Hoffmann, C., Kröcker, M., Rohne, E., Benchouk, C., Carr, J., Motsch, F., Payre, P., Thulasidas, M., Berlich, R., Lütjens, G., Mannert, C., Stenzel, H., Wiedenmann, W., Wolf, G., Grivaz, J.-F., Heusse, Ph, Kado, M., Kim, D.W., Veillet, J.-J., Azzurri, P., Bagliesi, G., Ferrante, I., Rizzo, G., Tenchini, R., Venturi, A., Verdini, P.G., Blair, G.A., Cowan, G., Green, M.G., Strong, J.A., Wright, A.E., Przysiezniak, H., Tuchming, B., Vallage, B., Konstantinidis, N., Combley, F., Lehto, M., Brandt, S., Rothberg, J., Williams, R.W., Armstrong, S.R., Charles, E., Greening, T.C., Saadi, Y., Vogt, M., Walsh, J., Wu, Sau Lan, Wu, X., Zobernig, G.
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Language:English
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Summary:During 1997 the ALEPH experiment at LEP gathered 57 pb −1 of data at centre-of-mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e +e −→HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: m H >87.9 GeV /c 2 at 95% confidence level.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(98)01506-8