IMPROVING LARGE-ORDER PERTURBATIVE EXPANSIONS IN QUANTUM CHROMODYNAMICS

被引:61
作者
BENEKE, M
ZAKHAROV, VI
机构
[1] Max-Planck-Institut für Physik, Werner-Heisenberg-Institut, 8000 Munich
关键词
D O I
10.1103/PhysRevLett.69.2472
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We consider divergences of the perturbative expansions in large orders in quantum electro- and chromodynamics and concentrate on the dependence of large-order contributions on the choice of the normalization point of coupling constants. We find that for sign-alternating series the predictive power of perturbation theory as measured by the minimal term of an asymptotic expansion can be drastically improved by a proper choice of the normalization point. In particular, this allows the elimination of the leading uncertainty of perturbative expansions in quantum chromodynamics.
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页码:2472 / 2474
页数:3
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