Fitting amu and B physics anomalies with a Z’ and a Vector-like 4th family in the Standard Model
The Standard Model is very successful. Nevertheless, there are some, perhaps significant, discrepancies with data.
A particularly interesting set of discrepancies hints at new physics related to muons. I will review the data and recent
NP models trying to fit the data. Then I will discuss a very simple model which is motivated by heterotic string constructions.