Measurement of the $CP$ violating phase φₛ and φₛsqq̄ at LHCb

Precise measurements of the Bₛ⁰ - B̄ₛ⁰ mixing parameters provide a powerful test of the Standard Model, offering potential hints to new physics. The LHCb collaboration has performed updated measurements of the $CP$-violating phases φₛcc̄s and φₛss̄s, which supersede previous results. Also, an alternative approach to determine Δ Γₛ is presented, bringing a new tool that may help to resolve the tension observed between measurements made in Bₛ⁰ → J/ψ φ by LHC experiments.