Measuring the running Top quark mass

In this contribution we discuss conceptual issues of current mass measurements performed at the Tevatron. In addition we propose an alternative method which is theoretically much cleaner and to a large extend free from the problems encountered in current measurements. In detail we discuss the direct determination of the top-quark's running mass from the cross section measurements performed at the Tevatron.
Comment: 8 pages, 4 figures. To appear in the proceedings of the 45th Rencontres de Moriond