Production of excited charm and charm-strange mesons at HERA

                        ZEUS Collaboration

                             Abstract

The production of excited charm, D_1(2420)^0 and D_2^{*}(2460)^0, and 
charm-strange, D_{s1}(2536)+/-, mesons in ep collisions was measured 
with the ZEUS detector at HERA using an integrated luminosity of 
126 pb^-1. Masses, widths and helicity parameters were determined. 
The measured yields were converted to the rates of c quarks hadronising 
as a given excited charm meson and to the ratios of the dominant 
D_2^{*}(2460)^0 and D_{s1}(2536)^\pm branching fractions. A search 
for the radially excited charm meson, D^*(2640)+/-, was also 
performed. The results are compared with those measured previously 
and with theoretical expectations.