Complete Vector-like Fourth Family with $\mathrm{U(1)}^\prime$: A Global Analysis

Understand

In this paper we present an in-depth analysis of a recently proposed Standard Model extension with a complete fourth generation of quarks and leptons, which are vector-like with respect to the Standard Model gauge group and charged under a new spontaneously broken vector-like $\mathrm{U(1)^\prime}$ gauge symmetry.

• The model is designed to explain the known muon anomalies, i.e.
• the observed deviations from Standard Model predictions in the anomalous magnetic moment of the muon, $\Delta a_\mu$, and in $b \rightarrow s \ell^+ \ell^-$ processes.
• We perform a global $\chi^2$ analysis of the data with $65$ model parameters and including $98$ observables.