  CP asymmetry in some exclusive decays of charged B meson are calculated in a
Bethe-Salpeter approach. Hadronic final state interactions are ignored. Complex
decay amplitudes are assumed to arise entirely from perturbative
quark-antiquark loops. Calculations are done both with and without the gluon
quark-antiquark vacuum polarization loops. The effects of neglecting the
imaginary parts arising from the diagonal quark-antiquark loops are also
studied.
