  Asymmetric e^+e^- colliders running on the \Upsilon(4S) (B factories) will
much more readily measure CP-violating asymmetries in the decays of B_d^0 and
B^\pm mesons than in the decays of B_s^0 mesons. As such, they will seemingly
not be able to probe new phases in Bs-Bs(bar) mixing, i.e. in b\to s
transitions. However, by measuring the CP angle \beta via b \to s hadronic
penguin decays such as B_d^0 \to \eta'\ks and B_d^0 \to\phi\ks, and comparing
its value to that obtained in B_d^0 \to\Psi\ks, it is possible to detect the
presence of new physics in the b\to s flavour-changing neutral current. Recent
CLEO results are encouraging in this regard. They suggest that the branching
ratio of the b\to s penguin decay B_d^0 \to \eta'\ks is anomalously large,
about 4 \times 10^{-5}, which will make it much easier to search for new
physics in b\to s transitions.
