Search for charged Higgs bosons in e+e- collisions at energies up to √s = 209 GeV

A. Heister, S. Schael, R. Barate, R. Brunelière, I. De Bonis, D. Decamp, C. Goy, S. Jezequel, J. P. 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, L. Garrido, E. Graugés, J. Lopez, M. Martinez, G. Merino, 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. Ouyang, 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. 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. Pascolo, P. Perret, J. D. Hansen, J. R. Hansen, P. H. Hansen, B. S. Nilsson

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Abstract

A search for charged Higgs bosons produced in pairs is performed with data collected at centre-of-mass energies ranging from 189 to 209 GeV by ALEPH at LEP, corresponding to a total luminosity of 629 pb-1. The three final states τ+νττ -ν̄τ, cs̄τ-ντ and cs̄sc̄ are considered. No evidence for a signal is found and lower limits are set on the mass mH± as a function of the branching fraction B(H+ ↔ τ+ ντ). In the framework of a two-Higgs-doublet model, and assuming B(H+ ↔ τ+ ντ) + B(H+ ↔ cs̄) = 1, charged Higgs bosons with masses below 79.3 GeV/c2 are excluded at 95% confidence level independently of the branching ratios. © 2002 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1-13
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume543
Issue number1-2
DOIs
Publication statusPublished - 5 Sep 2002

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    Heister, A., Schael, S., Barate, R., Brunelière, R., De Bonis, I., Decamp, D., Goy, C., Jezequel, S., Lees, J. P., Martin, F., Merle, E., Minard, M. N., Pietrzyk, B., Trocmé, B., Boix, G., Bravo, S., Casado, M. P., Chmeissani, M., Crespo, J. M., ... Nilsson, B. S. (2002). Search for charged Higgs bosons in e+e- collisions at energies up to √s = 209 GeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 543(1-2), 1-13. https://doi.org/10.1016/S0370-2693(02)02380-8