Production of Excited P-Wave Charm Mesons at Hera

The production of excited charm mesons has been observed with the ZEUS detector at HERA. Neutral orbitally excited P-wave charm mesons have been reconstructed in the D^*±π^∓ final state and the charm-strange meson D^±_s1(2536) was found in the D^*±K⁰_s final state. The fraction of D^*± mesons originating from the decays of these mesons has been calculated and converted to the rate of c quarks hadronising as the excited charm mesons. A search for radially excited charm mesons in the D^*±π⁺π^- final state has also been performed. The results are compared with those obtained in e⁺e^- annihilations.