Tree-level unitarity constraints for the SM-like 2HDM
Abstract
We consider a Z2-symmetric Two Higgs Doublet Model (2HDM), where the vacuum expectation values of both doublets are non-vanishing. Unitarity constraints for the SM-like 2HDM are analyzed for the mass of the lightest Higgs boson in the range [115,127] GeV. New stringent bounds on tanβ, 0.17<tanβ<6.10, are derived. A discussion of the source of these constraints is provided.
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