New physics in Bs0→J/ψϕ decays?

After a brief review of Bs0-B̄s0 oscillations, we discuss the weak decays Bs0→J/ψϕ and Bs0→J/ψf0(980) and the ratio Rf0/ϕ of their decay rates in the light of recent measurements by the LHCb, D0̸ and CDF Collaborations. We point out that the experimental values for Rf0/ϕ impose tight limits on new physics contributions to both decay channels.