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Search for charged Higgs bosons in e(+)e(-) collisions at root s=189-209 GeV

Research output: Contribution to journalJournal article

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  • G. Abbiendi
  • C. Ainsley
  • P. F. Akesson
  • 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
  • OPAL Collaboration
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Article number2076
<mark>Journal publication date</mark>07/2012
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number7
Volume72
Number of pages22
Pages (from-to)-
Publication statusPublished
Original languageEnglish

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 root s = 189-209 GeV, corresponding to an integrated luminosity of approximately 600 pb(-1). Charged Higgs bosons are assumed to be pair-produced and to decay into q (q) over bar, tau nu(tau) 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 BR(H-+/- -&gt; tau nu(tau)) + BR(H-+/- -&gt; q (q) over bar) = 1, motivated by general 2HDM type II models, excluded areas on the [m(H +/-), BR(H-+/- -&gt; tau nu(tau))] 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 +/- -&gt; tau nu(tau)). A scan of the 2HDM type I model parameter space is performed and limits on the Higgs-boson masses m(H)+/- and m(A) are presented for different choices of tan beta.