Constraints on the Lee-Wick Higgs Sector

Understand

Lee-Wick partners to the Standard Model Higgs doublet may appear at a mass scale that is significantly lower than that of the remaining Lee-Wick partner states.

• The relevant effective theory is a two-Higgs doublet model in which one doublet has wrong-sign kinetic and mass terms.
• We determine bounds on this effective theory, including those from neutral B-meson mixing, b --> X_s gamma, and Z --> b b-bar.
• The results differ from those of conventional two-Higgs doublet models and lead to meaningful constraints on the Lee-Wick Higgs sector.