Search for charged Higgs bosons in e+e- collisions at [Formula: see text]

OPAL Collaboration; G Abbiendi; C Ainsley; P F Åkesson; G Alexander; G Anagnostou; K J Anderson; S Asai; D Axen; I Bailey; E Barberio; T Barillari; R J Barlow; R J Batley; P Bechtle; T Behnke; K W Bell; P J Bell; G Bella; A Bellerive; G Benelli; S Bethke; O Biebel; O Boeriu; P Bock; M Boutemeur; S Braibant; R M Brown; H J Burckhart; S Campana; P Capiluppi; R K Carnegie; A A Carter; J R Carter; C Y Chang; D G Charlton; C Ciocca; A Csilling; M Cuffiani; S Dado; M Dallavalle; A De Roeck; E A De Wolf; K Desch; B Dienes; J Dubbert; E Duchovni; G Duckeck; I P Duerdoth; E Etzion; F Fabbri; P Ferrari; F Fiedler; I Fleck; M Ford; A Frey; P Gagnon; J W Gary; C Geich-Gimbel; G Giacomelli; P Giacomelli; M Giunta; J Goldberg; E Gross; J Grunhaus; M Gruwé; A Gupta; C Hajdu; M Hamann; G G Hanson; A Harel; M Hauschild; C M Hawkes; R Hawkings; G Herten; R D Heuer; J C Hill; K Hoffman; D Horváth; P Igo-Kemenes; K Ishii; H Jeremie; P Jovanovic; T R Junk; J Kanzaki; D Karlen; K Kawagoe; T Kawamoto; R K Keeler; R G Kellogg; B W Kennedy; S Kluth; T Kobayashi; M Kobel; S Komamiya; T Krämer; A Krasznahorkay Jr; P Krieger; J von Krogh; T Kuhl; M Kupper; G D Lafferty; H Landsman; D Lanske; D Lellouch; J Letts; L Levinson; J Lillich; S L Lloyd; F K Loebinger; J Lu; A Ludwig; J Ludwig; W Mader; S Marcellini; T E Marchant; A J Martin; T Mashimo; P Mättig; J McKenna; R A McPherson; F Meijers; W Menges; F S Merritt; H Mes; N Meyer; A Michelini; S Mihara; G Mikenberg; D J Miller; W Mohr; T Mori; A Mutter; K Nagai; I Nakamura; H Nanjo; H A Neal; S W O'Neale; A Oh; A Okpara; M J Oreglia; S Orito; C Pahl; G Pásztor; J R Pater; J E Pilcher; J Pinfold; D E Plane; O Pooth; M Przybycień; A Quadt; K Rabbertz; C Rembser; P Renkel; J M Roney; A M Rossi; Y Rozen; K Runge; K Sachs; T Saeki; E K G Sarkisyan; A D Schaile; O Schaile; P Scharff-Hansen; J Schieck; T Schörner-Sadenius; M Schröder; M Schumacher; R Seuster; T G Shears; B C Shen; P Sherwood; A Skuja; A M Smith; R Sobie; S Söldner-Rembold; F Spano; A Stahl; D Strom; R Ströhmer; S Tarem; M Tasevsky; R Teuscher; M A Thomson; E Torrence; D Toya; I Trigger; Z Trócsányi; E Tsur; M F Turner-Watson; I Ueda; B Ujvári; C F Vollmer; P Vannerem; R Vértesi; M Verzocchi; H Voss; J Vossebeld; C P Ward; D R Ward; P M Watkins; A T Watson; N K Watson; P S Wells; T Wengler; N Wermes; G W Wilson; J A Wilson; G Wolf; T R Wyatt; S Yamashita; D Zer-Zion; L Zivkovic

doi:10.1140/epjc/s10052-012-2076-0

Search for charged Higgs bosons in e⁺e^- collisions at [Formula: see text]

Eur Phys J C Part Fields. 2012;72(7):2076. doi: 10.1140/epjc/s10052-012-2076-0. Epub 2012 Jul 24.

Authors

OPAL Collaboration; G Abbiendi¹, C Ainsley², P F Åkesson³, G Alexander⁴, G Anagnostou⁵, K J Anderson⁶, S Asai^{7

8}, D Axen⁹, I Bailey¹⁰, E Barberio³, T Barillari¹¹, R J Barlow¹², R J Batley², P Bechtle¹³, T Behnke¹³, K W Bell¹⁴, P J Bell⁵, G Bella⁴, A Bellerive¹⁵, G Benelli¹⁶, S Bethke¹¹, O Biebel¹⁷, O Boeriu¹⁸, P Bock¹⁹, M Boutemeur¹⁷, S Braibant¹, R M Brown¹⁴, H J Burckhart³, S Campana¹⁶, P Capiluppi¹, R K Carnegie¹⁵, A A Carter²⁰, J R Carter², C Y Chang²¹, D G Charlton⁵, C Ciocca¹, A Csilling²², M Cuffiani¹, S Dado²³, M Dallavalle¹, A De Roeck³, E A De Wolf³, K Desch¹³, B Dienes²⁴, J Dubbert¹⁷, E Duchovni²⁵, G Duckeck¹⁷, I P Duerdoth¹², E Etzion⁴, F Fabbri¹, P Ferrari³, F Fiedler¹⁷, I Fleck¹⁸, M Ford¹², A Frey³, P Gagnon²⁶, J W Gary¹⁶, C Geich-Gimbel²⁷, G Giacomelli¹, P Giacomelli¹, M Giunta¹⁶, J Goldberg²³, E Gross²⁵, J Grunhaus⁴, M Gruwé³, A Gupta⁶, C Hajdu²², M Hamann¹³, G G Hanson¹⁶, A Harel²³, M Hauschild³, C M Hawkes⁵, R Hawkings³, G Herten¹⁸, R D Heuer¹³, J C Hill², K Hoffman²¹, D Horváth²², P Igo-Kemenes¹⁹, K Ishii^{7

8}, H Jeremie²⁸, P Jovanovic⁵, T R Junk¹⁵, J Kanzaki^{7

8}, D Karlen¹⁰, K Kawagoe^{7

8}, T Kawamoto^{7

8}, R K Keeler¹⁰, R G Kellogg²¹, B W Kennedy¹⁴, S Kluth¹¹, T Kobayashi^{7

8}, M Kobel²⁷, S Komamiya^{7

8}, T Krämer¹³, A Krasznahorkay Jr²⁴, P Krieger¹⁵, J von Krogh¹⁹, T Kuhl¹³, M Kupper²⁵, G D Lafferty¹², H Landsman²³, D Lanske²⁹, D Lellouch²⁵, J Letts^{5

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33}, L Levinson²⁵, J Lillich¹⁸, S L Lloyd²⁰, F K Loebinger¹², J Lu⁹, A Ludwig²⁷, J Ludwig¹⁸, W Mader²⁷, S Marcellini¹, T E Marchant¹², A J Martin²⁰, T Mashimo^{7

8}, P Mättig^{5

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33}, J McKenna⁹, R A McPherson¹⁰, F Meijers³, W Menges¹³, F S Merritt⁶, H Mes¹⁵, N Meyer¹³, A Michelini¹, S Mihara^{7

8}, G Mikenberg²⁵, D J Miller³⁰, W Mohr¹⁸, T Mori^{7

8}, A Mutter¹⁸, K Nagai²⁰, I Nakamura^{7

8}, H Nanjo^{7

8}, H A Neal³³, S W O'Neale⁵, A Oh³, A Okpara¹⁹, M J Oreglia⁶, S Orito^{7

8}, C Pahl¹¹, G Pásztor¹⁶, J R Pater¹², J E Pilcher⁶, J Pinfold³², D E Plane³, O Pooth²⁹, M Przybycień³, A Quadt¹¹, K Rabbertz³, C Rembser³, P Renkel²⁵, J M Roney¹⁰, A M Rossi¹, Y Rozen²³, K Runge¹⁸, K Sachs¹⁵, T Saeki^{7

8}, E K G Sarkisyan³, A D Schaile¹⁷, O Schaile¹⁷, P Scharff-Hansen³, J Schieck¹¹, T Schörner-Sadenius³, M Schröder³, M Schumacher²⁷, R Seuster²⁹, T G Shears³, B C Shen¹⁶, P Sherwood³⁰, A Skuja²¹, A M Smith³, R Sobie¹⁰, S Söldner-Rembold¹², F Spano⁶, A Stahl²⁹, D Strom³¹, R Ströhmer¹⁷, S Tarem²³, M Tasevsky³, R Teuscher⁶, M A Thomson², E Torrence³¹, D Toya^{7

8}, I Trigger³, Z Trócsányi²⁴, E Tsur⁴, M F Turner-Watson⁵, I Ueda^{7

8}, B Ujvári²⁴, C F Vollmer¹⁷, P Vannerem¹⁸, R Vértesi²⁴, M Verzocchi²¹, H Voss³, J Vossebeld³, C P Ward², D R Ward², P M Watkins⁵, A T Watson⁵, N K Watson⁵, P S Wells³, T Wengler³, N Wermes²⁷, G W Wilson¹², J A Wilson⁵, G Wolf²⁵, T R Wyatt¹², S Yamashita^{7

8}, D Zer-Zion¹⁶, L Zivkovic²³

Affiliations

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

Abstract

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 [Formula: see text], corresponding to an integrated luminosity of approximately 600 pb^-1. Charged Higgs bosons are assumed to be pair-produced and to decay into [Formula: see text], 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 [Formula: see text], motivated by general 2HDM type II models, excluded areas on the [Formula: see text] 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 [Formula: see text] and m_A are presented for different choices of tanβ.