The Banks-Zaks expansion in perturbative QCD: An update

被引：3
|
作者：
Stevenson, P. M. [1 ]
机构：
[1] Rice Univ, TW Bonner Lab, Dept Phys & Astron, Houston, TX 77251 USA
来源：
MODERN PHYSICS LETTERS A | 2016年 / 31卷 / 40期
关键词：
INFRARED FIXED-POINT; ORDERS RENORMALON RESUMMATIONS; E+E-ANNIHILATION; GAUGE-THEORIES; LEADING ORDER; QUANTUM CHROMODYNAMICS; EFFECTIVE CHARGES; CROSS-SECTION; BETA-FUNCTION; LOW ENERGIES;
D O I：
10.1142/S0217732316502266
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The recent QCD calculations of the five-loop beta-function and of Re+e-to O(alpha(4)(s)) provide one more term in the Banks-Zaks (BZ) expansion in (161/2 - nf). There is no longer any hope that the expansion could extend, even crudely, to low nf. Above nf similar to 9, however, the results appear to be reasonably consistent from order to order. PACS Nos.: 11.10.St, 11.10.Wx
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页数：10
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