In a sample of 1.5 million hadronic decays of the Z collected by the ALEPH detector, a search is carried out for the decays and . The product branching ratio for D10 production is measured to be , and a 95% confidence level limit of is obtained for D2∗0 production.

A topological search sensitive to the processes above, but also to wide resonances that decay to and to non-resonant production is also carried out, yielding . Direct evidence of D∗π production inconsistent with D10 and D2∗0 in semileptonic B decay is presented.