ASYMPTOTIC ESTIMATE OF THE N-LOOP QCD CONTRIBUTION TO THE TOTAL E+E- ANNIHILATION CROSS-SECTION

被引：33

作者：

WEST, GB

机构：

[1] Theoretical Division, T-8, Los Alamos National Laboratory, MS B285, Los Alamos

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.67.1388

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A technique for estimating the large-order QCD perturbative contributions to the total e+e- total cross section is presented which is based upon the renormalization group and momentum analyticity. Our estimate for the coefficient of (alpha-s/pi)3 has recently been confirmed by two exact calculations. We find that the effective expansion parameter is, in fact, not alpha-s/pi but rather 4-pi-2eb1(alpha-s/pi), where b1 is the first coefficient in the expansion of the beta-function.

引用

页码：1388 / 1391

页数：4