https://doi.org/10.1140/epjc/s10052-012-2076-0
Regular Article - Experimental Physics
Search for charged Higgs bosons in e+e− collisions at
1
School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, UK
2
Dipartimento di Fisica dell’ Università di Bologna and INFN, 40126, Bologna, Italy
3
Physikalisches Institut, Universität Bonn, 53115, Bonn, Germany
4
Department of Physics and Astronomy, University of California, Riverside, CA, 92521, USA
5
Cavendish Laboratory, Cambridge, CB3 0HE, UK
6
Ottawa-Carleton Institute for Physics, Department of Physics, Carleton University, Ottawa, Ontario, K1S 5B6, Canada
7
CERN, European Organisation for Nuclear Research, 1211, Geneva 23, Switzerland
8
Enrico Fermi Institute and Department of Physics, University of Chicago, Chicago, IL, 60637, USA
9
Fakultät für Physik, Albert-Ludwigs-Universität Freiburg, 79104, Freiburg, Germany
10
Physikalisches Institut, Universität Heidelberg, 69120, Heidelberg, Germany
11
Department of Physics, Indiana University, Bloomington, IN, 47405, USA
12
Queen Mary and Westfield College, University of London, London, E1 4NS, UK
13
III Physikalisches Institut, Technische Hochschule Aachen, Sommerfeldstrasse 26-28, 52056, Aachen, Germany
14
University College London, London, WC1E 6BT, UK
15
School of Physics and Astronomy, Schuster Laboratory, The University of Manchester, Manchester, M13 9PL, UK
16
Department of Physics, University of Maryland, College Park, MD, 20742, USA
17
Laboratoire de Physique Nucléaire, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
18
Department of Physics, University of Oregon, Eugene, OR, 97403, USA
19
Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, UK
20
Department of Physics, Technion-Israel Institute of Technology, Haifa, 32000, Israel
21
Department of Physics and Astronomy, Tel Aviv University, Tel Aviv, 69978, Israel
22
International Centre for Elementary Particle Physics and Department of Physics, University of Tokyo, Tokyo, 113-0033, Japan
23
Kobe University, Kobe, 657-8501, Japan
24
Particle Physics Department, Weizmann Institute of Science, Rehovot, 76100, Israel
25
Institut für Experimentalphysik, Universität Hamburg/DESY, Notkestrasse 85, 22607, Hamburg, Germany
26
Department of Physics, University of Victoria, PO Box 3055, Victoria, BC, V8W 3P6, Canada
27
Department of Physics, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
28
Department of Physics, University of Alberta, Edmonton, AB, T6G 2J1, Canada
29
Research Institute for Particle and Nuclear Physics, 1525, Budapest, PO Box 49, Hungary
30
Institute of Nuclear Research, 4001, Debrecen, PO Box 51, Hungary
31
Sektion Physik, Ludwig-Maximilians-Universität München, Am Coulombwall 1, 85748, Garching, Germany
32
Max-Planck-Institute für Physik, Föhringer Ring 6, 80805, München, Germany
33
Department of Physics, Yale University, New Haven, CT, 06520, USA
* e-mail: Pippa.Wells@cern.ch
Received:
14
October
2008
Revised:
22
June
2012
Published online:
24
July
2012
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 tanβ.
© Springer-Verlag / Società Italiana di Fisica, 2012