Higgs sector in extensions of the minimal supersymmetric standard model
Journal Article
·
· Physical Review. D, Particles Fields
- Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
- Department of Physics, University of Florida, Gainesville, Florida 32608 (United States)
Extensions of the minimal supersymmetric standard model (MSSM) with additional singlet scalar fields solve the important {mu}-parameter fine-tuning problem of the MSSM. We compute and compare the neutral Higgs boson mass spectra, including one-loop corrections, of the following MSSM extensions: next-to-minimal supersymmetric standard model (NMSSM), the nearly-minimal supersymmetric standard model (nMSSM), and the U(1){sup '}-extended minimal supersymmetric standard model (UMSSM) by performing scans over model parameters. We find that the secluded U(1){sup '}-extended minimal supersymmetric standard model (sMSSM) is identical to the nMSSM if three of the additional scalars decouple. The dominant part of the one-loop corrections are model independent since the singlet field does not couple to MSSM particles other than the Higgs doublets. Thus, model-dependent parameters enter the masses only at tree level. We apply constraints from LEP bounds on the standard model and MSSM Higgs boson masses and the MSSM chargino mass, the invisible Z decay width, and the Z-Z{sup '} mixing angle. Some extended models permit a Higgs boson with mass substantially below the SM LEP limit or above theoretical limits in the MSSM. Ways to differentiate the models via masses, couplings, decays and production of the Higgs bosons are discussed.
- OSTI ID:
- 20774837
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 73; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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