| Summary: | Motivated by the recent CDF measurement of the W boson mass, which clearly demonstrates a significant deviation from the prediction of the Standard Model (SM). In the present paper, we study the Two-Higgs Doublet Model (2HDM) contribution to MW and its phenomenological implications in the case where the heavy CP-even H is identified as the observed Higgs boson with a mass of 125 GeV. Taking into account theoretical and current experimental constraints, as well as the new CDF measurement, we demonstrate that the 2HDM parameter space can provide a significant correction which predicts the W mass close to the new CDF MW measurement. It is found that MH±=MA is excluded, and the splitting of the charged Higgs boson with all other states is positive. We also discuss the effects on the effective mixing angle sin2θeff as well as the phenomenological implications on the charged Higgs and CP-odd Higgs boson decays in 2HDM type-I and type-X.
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