Light Charged Higgs Bosons in Supersymmetric Models

Abstract

We point out that present experimental limits from searches for neutral Higgs bosons at LEP already imply stringent lower bounds on the mass of the charged Higgs boson in the Minimal Supersymmetric Standard Model (MSSM); these bounds are especially severe for low values of \tanb ($\tanb \leq 3$), where the $H^{+}\bar{t}b$ coupling is large. However, these indirect constraints are much weaker in simple extensions of the MSSM Higgs sector involving the introduction of an extra U(1) gauge group or an extra $SU(2)\times U(1{)}_Y$ Higgs singlet field; in the latter case charged Higgs bosons can even be light enough to be pair produced at LEP.

LaTeX with equation.sty, 3 PS figures. Version to appear in PLB: Added one paragraph concerning charged Higgs searches at the Tevatron

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• Signature of Charged to Neutral Higgs Boson Decay at the LHC in SUSY Models
• Light Charged Higgs Boson and Supersymmetry
• Stau LSP and comparison with H^+(-) phenomenology
• Charged Higgs bosons in the Next-to MSSM (NMSSM)
• Possibility of spontaneous CP violation in the nonminimal supersymmetric standard model with two neutral Higgs singlets
• Summary of the Activities of the Working Group I on High Energy and Collider Physics
• On the possibility of a very light A^0 at low \tanβ
• Electroweak Symmetry Breaking at the LHC
• Effects of R-parity Violation on the Charged Higgs Boson Decays