Search for charged Higgs bosons: combined results using LEP data

Heister, A. and Schael, S. and Barate, R. and Bruneliere, R. and De Bonis, I. and Decamp, D. and Goy, C. and Jezequel, S. and Lees, J. P. and Martin, F. and Merle, E. and Minard, M. N. and Pietrzyk, B. and Boix, G. and Bravo, S. and Casado, M. P. and Chmeissani, M. and Crespo, J. M. and Fernandez, E. and Fernandez-Bosman, M. and Garrido, L. and Grauges, E. and Lopez, J. and Martinez, M. and Merino, G. and Pacheco, A. and Paneque, D. and Ruiz, H. and Colaleo, A. and Creanza, D. and Boldizsár, László and Novák, Tamás and Tarján, Péter and Tóth, József and Veszprémi, Viktor and Vesztergombi, György and Csilling, Ákos and Hajdu, Csaba and Horváth, Dezső and Pásztor, Gabriella and Ujvári, Balázs and Vértesi, Róbert (2013) Search for charged Higgs bosons: combined results using LEP data. EUROPEAN PHYSICAL JOURNAL C, 73 (7). ISSN 1434-6044

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Abstract

The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for pair-produced charged Higgs bosons in the framework of Two Higgs Doublet Models (2HDMs). The data of the four experiments have been statistically combined. The results are interpreted within the 2HDM for Type I and Type II benchmark scenarios. No statistically significant excess has been observed when compared to the Standard Model background prediction, and the combined LEP data exclude large regions of the model parameter space. Charged Higgs bosons with mass below 80 GeV/c2 (Type II scenario) or 72.5 GeV/c2 (Type I scenario, for pseudo-scalar masses above 12 GeV/c2 ) are excluded at the 95% confidence level.

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