High order PT calculations for heavy quarks near threshold

Abstract

Results of analytical calculations for heavy quark systems in higher orders of perturbation theory are overviewed. I discuss baryons with one finite mass quark in the next-to-leading order and heavy quark pair production near the threshold within NRQCD.

Comments: 14 pages, latex, 1 figure. Talk given at Research Workshop ``Calculations for Modern and Future Colliders'', JINR, Dubna, Russia, July 9-23, 2000