Search for the standard model higgs boson at LEP

J. A. Heister, S. Schael, R. Barate, R. Brunelière, I. De Bonis, D. Decamp, C. Goy, S. Jezequel, J. R. Lees, F. Martin, E. Merle, M. N. Minard, B. Pietrzyk, B. Trocmé, G. Boix, S. Bravo, M. P. Casado, M. Chmeissani, J. M. Crespo, E. FernandezM. Fernandez-Bosman, Ll Garrido, E. Graugés, J. Lopez, M. Martinez, G. Merino, R. Miquel, Ll M. Mir, A. Pacheco, D. Paneque, H. Ruiz, A. Colaleo, D. Creanza, N. De Filippis, M. De Palma, G. Iaselli, G. Maggi, M. Maggi, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Quyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, P. Azzurri, T. Barklow, O. Buchmüller, M. Cattaneo, F. Cerutti, B. Clerbaux, H. Drevermann, R. W. Forty, M. Frank, F. Gianotti, T. C. Greening, J. B. Hansen, J. Harvey, D. E. Hutchcroft, P. Janot, B. Jost, M. Kado, P. Maley, P. Mato, A. Moutoussi, F. Ranjard, L. Rolandi, D. Schlatter, G. Sguazzoni, W. Tejessy, F. Teubert, A. Valassi, I. Videau, J. J. Ward, F. Badaud, S. Dessagne, A. Falvard, D. Fayolle, P. Gay, J. Jousset, B. Michel, S. Monteil, D. Pallin, J. M. Pascólo, P. Perret, J. D. Hansen, J. R. Hansen

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Abstract

© 2016, Elsevier. All rights reserved. The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have collected a total of 2461 pb−1 of e+ e− collision data at centre-of-mass energies between189 and 209 GeV. The data are used to search for the Standard Model Higgs boson. The search results of the four collaborations are combined and examined in a likelihood test for their consistency with two hypotheses: the background hypothesis and the signal plus background hypothesis. The corresponding confidences have been computed as functions of the hypothetical Higgs boson mass. A lower bound of114.4 GeV/c2 is established, at the 95% confidence level, on the mass of the Standard Model Higgs boson. The LEP data are also used to set upper bounds on the HZZ coupling for various assumptions concerning the decay of the Higgs boson.
Original languageEnglish
Pages (from-to)61-75
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume565
Issue number1-4
DOIs
Publication statusPublished - 17 Jul 2003

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    Heister, J. A., Schael, S., Barate, R., Brunelière, R., De Bonis, I., Decamp, D., Goy, C., Jezequel, S., Lees, J. R., Martin, F., Merle, E., Minard, M. N., Pietrzyk, B., Trocmé, B., Boix, G., Bravo, S., Casado, M. P., Chmeissani, M., Crespo, J. M., ... Hansen, J. R. (2003). Search for the standard model higgs boson at LEP. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 565(1-4), 61-75. https://doi.org/10.1016/S0370-2693(03)00614-2