Helicity conservation in inclusive nonleptonic decay B→VX:: Test of the long-distance final-state interaction -: art. no. 054018

The polarization measurement in inclusive B decay provides us with a simple test of how much the long-distance final-state interaction takes place as the energy of the observed meson varies in the final state. We give the expectation of perturbative QCD for the energy dependence of the helicity fractions in a semiquantitative form. Experiment will tell us for which decay processes the perturbative QCD calculation should be applicable.