Speaker
André Santos
Description
In recent years, several experimental measurements have shown deviations from the Standard Model (SM) predictions. One such deviation is the anomaly in the measurement of $b\to s l^+l^-$ decays. Additionally, the long-standing muon $(g-2)$ anomaly has been confirmed, now with a discrepancy of $4.2\sigma$ relative to the SM prediction. In this paper, we study the effects of new physics on the $Z \to b\bar{b}$ decay amplitude by considering a specific class of SM extensions that aim to solve these discrepancies and the existence of dark matter. We present a formalism to calculate the radiative corrections to the decay amplitude in this framework and use it to find bounds on the parameters of one of these models.
