(s/d) gamma Transitions as a Test of CKM-CP Violation > We point out that a simple test of the mechanism of CP
violation can be performed by a
measurement of the CP asymmetries in exclusive and inclusive
radiative rare decays. We show that the rate asymmetries
\mbox{
$\Delta \Gamma = \Gamma(B^- \to f \gamma) - \Gamma(B^+ \to \bar{f}
\gamma)$}
for certain final states $f$
can be predicted in a theoretically clean way. Some implications for
$b \to s \ell^+ \ell^-$ decays are discussed.