A. A. Pivovarov
Published 2000-09-04Version 1
The cross section near the $t\bar t$ production threshold in $e^+e^-$ annihilation and $\gamma\gamma$ collisions is discussed. The NNLO results within NRQCD are briefly overviewed.
Comments: 17 pages, latex, 1 figure. Talk presented at Quarks-2000 Seminar, Pushkin, Russia, May 13-21, 2000
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