Journal Article

Search for charged Higgs bosons in e+e− collisions at

Yamashita, S., Geich-Gimbel, C., Orito, S., Quadt, A., Pahl, C., Frey, A., Chang, C. Y., Anderson, K. J., Dallavalle, M., Giunta, M., Barlow, R. J., Barillari, T., Bailey, I., Desch, K., Turner-Watson, M. F., Ciocca, C., Braibant, S., Kawamoto, T., Csilling, A., Vossebeld, J., Seuster, R., Pater, J. R., Giacomelli, G., Kennedy, B. W., Capiluppi, P., Carter, J. R., Hawkes, C. M., Schaile, O., Trócsányi, Z., Nakamura, I., Ludwig, J., Schumacher, M., Kawagoe, K., Meijers, F., Junk, T. R., Vollmer, C. F., Michelini, A., Smith, A. M., Wyatt, T. R., Bethke, S., Sachs, K., Plane, D. E., Wilson, J. A., Hawkings, R., Anagnostou, G., Karlen, D., Saeki, T., Abbiendi, G., O’Neale, S. W., Thomson, M. A., Watkins, P. M., Kuhl, T., Loebinger, F. K., Teuscher, R., Mättig, P., Mashimo, T., Tasevsky, M., Mikenberg, G., Letts, J., Duchovni, E., Axen, D., Hajdu, C., Ishii, K., Ueda, I., Boutemeur, M., Marchant, T. E., Torrence, E., Gross, E., Mutter, A., Vannerem, P., Okpara, A., Tarem, S., Jeremie, H., Cuffiani, M., Kanzaki, J., Meyer, N., Jovanovic, P., Menges, W., Ujvári, B., Fiedler, F., Verzocchi, M., Carnegie, R. K., Dienes, B., Biebel, O., Barberio, E., Kobel, M., Fo

2012

Overview

A search is made for charged Higgs bosons predicted by Two-Higgs-Doublet extensions of the Standard Model (2HDM) using electron-positron collision data collected by the OPAL experiment at , corresponding to an integrated luminosity of approximately 600 pb −1 . Charged Higgs bosons are assumed to be pair-produced and to decay into , τν τ or AW ± . No signal is observed. Model-independent limits on the charged Higgs-boson production cross section are derived by combining these results with previous searches at lower energies. Under the assumption , motivated by general 2HDM type II models, excluded areas on the plane are presented and charged Higgs bosons are excluded up to a mass of 76.3 GeV at 95 % confidence level, independent of the branching ratio BR(H ± → τν τ ). A scan of the 2HDM type I model parameter space is performed and limits on the Higgs-boson masses and m A are presented for different choices of tan β .

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V
• Subject: Astronomy / Astrophysics and Cosmology / Bosons / Confidence intervals / Elementary Particles / Hadrons / Heavy Ions / Higgs bosons / Luminosity / Measurement Science and Instrumentation / Nuclear Energy / Nuclear Physics / Physics / Physics and Astronomy / Quantum Field Theories / Quantum Field Theory / Quarks / Regular Article - Experimental Physics / String Theory