Speaker
Leonid Gladilin
(Moscow State University)
Description
The charm fragmentation function has been measured in D* photoproduction with the ZEUS detector at HERA. The fragmentation function has been measured versus z, the ratio of E+p_parallel for the D* meson and that for the associated jet, where E is the energy and p_parallel the longitudinal momentum relative to the jet axis. The measured function is compared to different fragmentation models incorporated in leading-logarithm Monte Carlo simulations and a next-to-leading-order calculation. The results are similar to those from e+e- experiments.
In addition, the production of excited charm, D_1(2420)0 and D_2^*(2460)0, and charm-strange, D_s1(2536)+/-, mesons has been measured with the ZEUS detector at HERA. The measured yields were converted to the rates of c quarks hadronising as a given excited D meson. The results are compared with those measured previously and with theoretical expectations.
Primary author
Leonid Gladilin
(Moscow State University)
