Shedding light on the $b\to s$ anomalies with a dark sector

Understand

The LHCb collaboration has recently reported on some anomalies in $b\to s$ transitions.

• In addition to discrepancies with the Standard Model (SM) predictions in some angular observables and branching ratios, an intriguing hint for lepton universality violation was found.
• Here we propose a simple model that extends the SM with a dark sector charged under an additional $U(1)$ gauge symmetry.
• The spontaneous breaking of this symmetry gives rise to a massive $Z^\prime$ boson, which communicates the SM particles with a valid dark matter candidate, while solving the $b\to s$ anomalies with contributions to the relevant observables.