Constraints on two-Higgs-doublet models at large tan beta from W and Z decays

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dc.contributor.authorLebedev, O.en
dc.contributor.authorLoinaz, Williamen
dc.contributor.authorTakeuchi, Tatsuen
dc.contributor.departmentInstitute for Particle, Nuclear and Astronomical Sciences (IPNAS)en
dc.contributor.departmentPhysicsen
dc.date.accessed2013-12-16en
dc.date.accessioned2013-12-18T19:46:39Zen
dc.date.available2013-12-18T19:46:39Zen
dc.date.issued2000-09-01en
dc.description.abstractWe study constraints on type-II two-Higgs-doublet models at large tan beta from CERN LEP and 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 boson mass. For tan beta=100 we obtain the 1 sigma classical (Bayesian) bounds of m(H+/-) greater than or equal to 670 GeV (370 GeV) and 1 greater than or equal to m(h)0/m(A)0/(alpha = beta) =m(H)0/m(A)0/(alpha=0) greater than or equal to 0.68 (0.64). The 2 sigma bounds are weak. Currently, the Fermilab Tevatron experimental limits on lepton universality violation in W decay provide no significant constraint on the Higgs sector.en
dc.identifier.citationLebedev, O ; Loinaz, W ; Takeuchi, T, SEP 1 2000. “Constraints on two-Higgs-doublet models at large tan beta from W and Z decays,” PHYSICAL REVIEW D 62(5): 055014. DOI: 10.1103/PhysRevD.62.055014en
dc.identifier.doihttps://doi.org/10.1103/PhysRevD.62.055014en
dc.identifier.issn0556-2821en
dc.identifier.urihttp://hdl.handle.net/10919/24748en
dc.identifier.urlhttp://link.aps.org/doi/10.1103/PhysRevD.62.055014en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectfermion pair productionen
dc.subjectqed correctionsen
dc.subjectb->x-s-gammaen
dc.subjectqcden
dc.subjectAstronomy & Astrophysicsen
dc.subjectPhysicsen
dc.titleConstraints on two-Higgs-doublet models at large tan beta from W and Z decaysen
dc.title.serialPhysical Review Den
dc.typeArticle - Refereeden

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