Recent evidence for anomalous $CP$ violation in $B$-meson oscillations can be interpreted as resulting from $CPT$ violation. This yields the first sensitivity to $CPT$ violation in the $B_s^0$ system, with the relevant coefficient for $CPT$ violation constrained at the level of parts in ${10}^{12}$.

• Received 9 August 2010

DOI:https://doi.org/10.1103/PhysRevD.82.101702