Constraints from New CDF II W-Boson Mass On Top-Bottom Seesaw and the TopFlavor Models

Abstract

In top-bottom seesaw and topflavor model, there may exist extra Higgses and vectorlike fermions, and we have examined the W mass anomaly reported by CDF II in these frames. We found that the CDF II W-boson mass data constrains the parameter r_t and z_t strictly in the two models, respectively, while the constraints on other parameters such as m_H, m_\chi are quite weak. Therefore, we conclude that in the two models, the W mass increment is sensitive to the extra fermions, but not the extra scalars. In topflavor model, we also consider the W mass increment induced by the mass mixing of the light and the heavy gauge bosons and the contribution is not too large and the constraints on the parameters x and y are weak.