Search for charged Higgs bosons in e.sup.+e.sup.- collisions at [Formula omitted]

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 omitted], corresponding to an integrated luminosity of approximately 600 pb.sup.-1. Charged Higgs boson...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2012-07, Vol.72 (7)
Main Authors: Abbiendi, G, Ainsley, C, Åkesson, P. F, Alexander, G, Anagnostou, G, Anderson, K. J, Asai, S
Format: Article
Language:English
Subjects:
Analysis
Collisions (Nuclear physics)
Online Access:Get full text
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Summary: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 omitted], corresponding to an integrated luminosity of approximately 600 pb.sup.-1. Charged Higgs bosons are assumed to be pair-produced and to decay into [Formula omitted], [tau][nu].sub.[tau] or AW.sup.±. 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 omitted], motivated by general 2HDM type II models, excluded areas on the [Formula omitted] 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.sup.±[right arrow][tau][nu].sub.[tau]). A scan of the 2HDM type I model parameter space is performed and limits on the Higgs-boson masses [Formula omitted] and m.sub.A are presented for different choices of tan[beta].
ISSN:1434-6044
DOI:10.1140/epjc/s10052-012-2076-0