First hint of nonstandard $\mathrm{CP}$ violation from $\overrightarrow{B}\phi K_S$ decay

We comment on the implications of the recently measured $\mathrm{CP}$ asymmetry in $\overrightarrow{B}\phi K_S$ decay. The data disfavor the standard model at $2.7\sigma$ and, if the trend persists in the future with higher statistics, require the existence of $\mathrm{CP}$ violation beyond that in the CKM matrix. In particular, the $\overrightarrow{b}s\overline{s}s$ decay amplitude would require new contributions of comparable size to the standard model ones with an order one phase. While not every model can deliver such a large amount of $\mathrm{CP}$ and flavor violation, those with substantial FCNC couplings to the Z can reproduce the experimental findings.