Speaker
Description
The theoretical prediction for the W-boson mass ($M_W$) is sensitive to physics beyond the standard model (BSM). Currently, there is a $2\sigma$ discrepancy between the standard model (SM) theoretical prediction and the measured value of $M_W$, obtained from the LEP 2, Tevatron and LHC experiments. Considering also the recent measurement of $M_W$ with the CDF II detector, the discrepancy is severely aggravated and the precise determination of theoretical BSM corrections is necessary.
We perform the one-loop renormalization of particle physics models with gauge sectors extended by an extra U(1) gauge symmetry in order to compute the radiative corrections to the muon decay process. As a result, we obtain -- to the best of our knowledge -- for the first time in the literature a finite, gauge invariant prediction for $M_W$ in U(1) extensions at one-loop accuracy.
In the literature only a truncated version of the prediction for $M_W$ was available for U(1) extensions. We compare the truncated and full predictions for $M_W$ for different sets of input parameters in order to explore the validity of neglecting several terms from the complete one-loop prediction.
The talk is based on $\texttt{arxiv:2305.11931}$
