Abstract :
The formulae for D0-D̄0 or B0-B̄0 mixing and CP violation at the τ-charm or B-meson factories are derived, for the case that only the decay-time distribution of one D or B meson is to be measured. In particular, we point out a new possibility to determine the D0-D̄0 mixing rate in semileptonic D decays at the Ψ(4.14) resonance; and show that both direct and indirect CP asymmetries can be measured at the ϒ(4S) resonance without ordering the decay times of two Bd mesons or measuring their difference.
