Constraints on Two-Higgs Doublet Models at Large tan{beta} from W and Z decays

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dc.creatorLebedev, Oleg
dc.creatorLoinaz, Will
dc.creatorTakeuchi, Tatsu
dc.date2000-02-09
dc.date.accessioned2026-07-07T03:40:46Z
dc.date.available2026-07-07T03:40:46Z
dc.descriptionWe study constraints on type-II two Higgs doublet models at large tan{beta} from LEP/SLD Z-pole data and from lepton universality violation in W decay. We perform a global fit and find that, in the context of Z decay, the LEP/SLD experimental values for lepton universality violation, R_b, and A_b all somewhat disfavor the model. Contributions from the neutral Higgs sector can be used to constrain the scalar-pseudoscalar Higgs mass splittings. Contributions from the charged Higgs sector allow us to constrain the charged Higgs mass. For tan{beta}=100 we obtain the 1 sigma classical (Bayesian) bounds of m_{H+} > 670 GeV (370 GeV) and 1 > m_{h0}/m_{A0} > 0.68 (0.64). The 2 sigma bounds are weak. Currently, the Tevatron experimental limits on lepton universality violation in W decay provide no significant constraint on the Higgs sector.
dc.description26 pages, 9 postscript figures, REVTeX
dc.identifierhttps://arxiv.org/abs/hep-ph/0002106
dc.identifierhttp://arxiv.org/abs/hep-ph/0002106
dc.identifierPhys.Rev. D62 (2000) 055014
dc.identifierdoi:10.1103/PhysRevD.62.055014
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/39385
dc.subjectHigh Energy Physics - Phenomenology
dc.titleConstraints on Two-Higgs Doublet Models at Large tan{beta} from W and Z decays
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