Search for charged Higgs bosons in e+e?/sup> collisions at ?s=189-209 GeV\sqrt{s}=189\mbox{--}209\ \mbox{GeV}
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- 作者：The OPAL Collaboration
G. Abbiendi (2)
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P. F. ?kesson (7)
G. Alexander (21)
G. Anagnostou (1)
K. J. Anderson (8)
S. Asai (2223)
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H. A. Neal (33)
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R. Teuscher (8)
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C. P. Ward (5)
D. R. Ward (5)
P. M. Watkins (1)
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P. S. Wells (7) Pippa.Wells@cern.ch
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L. Zivkovic (20) - 刊名：The European Physical Journal C - Particles and Fields
- 出版年：2012
- 出版时间：July 2012
- 年：2012
- 卷：72
- 期：7
- 全文大小：1.5 MB
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- ISSN：1434-6052
文摘
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 ?s=189-209 GeV\sqrt{s}=189\mbox{--}209\ \mbox{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)]\mathrm{q} \bar{\mathrm{q}}, 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 BR (H± ? tnt) + BR (H± ? q [`(q)]) = 1\mathrm{BR} (\mathrm{H}^{\pm} \to \tau\nu_{\tau}) + \mathrm{BR} (\mathrm{H}^{\pm} \to \mathrm{q} \bar{\mathrm{q}}) = 1, motivated by general 2HDM type II models, excluded areas on the [mH± , BR (H± ? tnt)][m_{\mathrm{H}^{\pm}} , \mathrm{BR} (\mathrm {H}^{\pm} \to \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±→τν τ ). A scan of the 2HDM type I model parameter space is performed and limits on the Higgs-boson masses mH±m_{\mathrm{H}^{\pm}} and m A are presented for different choices of tanβ.