LEP Indications for Two Light Higgs Bosons and U(1)' Model

Abstract

Reanalyses of LEP data have shown preference to two light CP-even Higgs bosons. We discuss implications of such a Higgs boson spectrum for the minimal supersymmetric model extended by a Standard Model singlet chiral superfield and an additional Abelian gauge invariance (the U(1)' model). We, in particular, determine parameter regions that lead to two light CP-even Higgs bosons while satisfying existing bounds on the mass and mixings of the extra vector boson. In these parameter regions, the pseudoscalar Higgs is found to be nearly degenerate in mass with either the lightest or next-to-lightest Higgs boson. Certain parameters of the U(1)' model such as the effective mu parameter are found to be significantly bounded by the LEP two-light-Higgs signal.

20 pp, 7 figs, 2 tables

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Cited by in corpus (13)

• The Next-to-Minimal Supersymmetric Standard Model
• Complex Singlet Extension of the Standard Model
• Nonstandard Higgs Boson Decays
• Higgs Sector in Extensions of the MSSM
• Another step towards a no-lose theorem for NMSSM Higgs discovery at the LHC
• Electroweak phase transitions in the secluded U(1)-prime-extended MSSM
• A higher dimensional explanation of the excess of Higgs-like events at CERN LEP
• Higgs Bosons in supersymmetric U(1)' models with CP Violation
• CP violation in the secluded U(1)'-extended MSSM
• Neutrino masses and $\mu$ terms in a supersymmetric extra U(1) model
• New spectra in the HEIDI Higgs models
• Electric Dipole Moments in U(1)' Models
• Higgs Boson Searches via Dileptonic Bottomonium Decays