W boson mass in the NP models with extra gauge group
arXiv:2308.05304 · doi:10.1088/1674-1137/ad7012
Abstract
The precise measurement of the W boson mass is closely related to the contributions of new physics (NP), which can significantly constrain the parameter space of NP models, particularly those with an additional local gauge group. The inclusion of a new gauge boson and gauge couplings in these models can contribute to the oblique parameters , , and W boson mass at tree level. Taking into account the effects of kinetic mixing, we calculate and analyze the oblique parameters , , and W boson mass in such NP models in this study. It is found that the kinetic mixing effects can make significant contributions to the W boson mass, which can satisfy the recently measured W boson mass at CDF II or ATLAS by choosing appropriate values of gauge coupling constants and extra group charges of leptons or scalar doublets. In addition, if the leptonic Yukawa couplings are invariant under the extra local gauge group, these contributions can be eliminated by redefining the gauge boson fields through eliminating the neutral currents involving charged leptons, even with nonzero kinetic mixing effects.
arXiv comment15 pages, 3 figures
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