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+ | ====== TTP97-54 Two-loop QCD corrections to the heavy quark pair production | ||
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+ | < | ||
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+ | the threshold. We assume that the energy of the reaction is such that | ||
+ | both the perturbative expansion in the strong coupling constant and | ||
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+ | We explicitly obtain terms O(alpha_s^2/ | ||
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+ | Using the ideas of asymptotic expansions, we demonstrate how an | ||
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+ | From this analysis we obtain a matching relation between the vector | ||
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+ | </ | ||
+ | |**Andrzej Czarnecki and Kirill Melnikov** | ||
+ | |** Phys. Rev. Lett. 80 2531 1998 ** | | ||
+ | | {{preprints: | ||
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