[Li HaiBo] Inst High Energy Phys, Beijing 100049, Peoples R China
; [Yang MaoZhi] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
The possibility of studying D (0) - (D) over bar (0) mixing at a giga-Z linear collider "Z factory" where 10(9) hadronic Z (0) decays can be accumulated is examined. We discuss the sensitivity for the measurements of neutral D mixing parameters. These results are compared to those attainable at B factories. We find that the typical decay length of the neutral D mesons at Z factory is about 10 times larger than that at B factory. In addition, the resolution of the vertex detector of a giga-Z factory is 2-3 times better than that of B factory. The proper time resolution at Z factory is about 20-30 times better than that at B factory. Therefore the determination of the mixing parameters at a giga-Z factory is more precise.