POSSIBLE EXPLANATION WHY TAU(B(+ -)) SIMILAR-TO TAU(B(0)) BUT TAU(D(+/-)) SIMILAR-TO 2-TAU(D(0))/

Data show that tau(B)+/- similar to tau(B)0, but tau(D)+/- similar to 2 tau(D)0. The naive interpretation which attributes tau(D)+/- similar to 2 tau(D)0 to a destructive interference between two quark diagrams for DI decays definitely fails in the B case. We investigate the sugg estion of Close and Lipkin that the phases for producing radially exci ted states psi(2s) in the decay products of B mesons can possess an op posite sign to the integrals for psi(1s) decay products. Their contrib utions can partially compensate each other to result in tau(B)+/- simi lar to tau(B)0. Since D mesons are much lighter than B mesons, such po ssibilities do not exist in D decays.