Search for charged Higgs bosons in e+e− collisions at √s=189-209 GeV

• Verfasst von: Abbiendi, Giovanni [VerfasserIn]
• Verfasst von: Bock, Peter [VerfasserIn]
• Verfasst von: Igo-Kemenes, Peter [VerfasserIn]
• Verfasst von: Krogh, Jürgen von [VerfasserIn]
• Verfasst von: Okpara, Anna [VerfasserIn]
• Titel: Search for charged Higgs bosons in e+e− collisions at √s=189-209 GeV
• Körperschaft: OPAL Collaboration [VerfasserIn]
• Verf.angabe: the OPAL Collaboration, G. Abbiendi, P. Bock, P. Igo-Kemenes, J. von Krogh, A. Okpara [und weitere]
• E-Jahr: 2012
• Jahr: 24 July 2012
• Umfang: 22 S.
• Fussnoten: Im Titel werden die Zeichen "+" und "-" hochgestellt ; Gesehen am 08.11.2018
• Titel Quelle: Enthalten in: The European physical journal / C
• Ort Quelle: Berlin : Springer, 1998
• Jahr Quelle: 2012
• Band/Heft Quelle: 72(2012), 7, Artikel-ID 2076
• ISSN Quelle: 1434-6052
• DOI: doi:10.1140/epjc/s10052-012-2076-0
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Charged Higgs Boson
• Sach-SW: Higgs Boson
• Sach-SW: Likelihood Selection
• Sach-SW: Systematic Uncertainty
• Sach-SW: Test Mass
• K10plus-PPN: 1582644438

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 s√=189--209 GeVs=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 qq¯qq¯\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±→τντ)+BR(H±→qq¯)=1BR(H±→τντ)+BR(H±→qq¯)=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±→τντ)][mH±,BR(H±→τντ)][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±mH±m_{\mathrm{H}^{\pm}} and m A are presented for different choices of tanβ.