期刊
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
卷 230, 期 12-13, 页码 2601-2608出版社
SPRINGER HEIDELBERG
DOI: 10.1140/epjs/s11734-021-00263-1
关键词
-
资金
- ministerio de Ciencia, Innovacion y Universidades [FPA2017-86989-P, SEV-2016-0588]
- Generalitat de Catalunya [2017SGR1069]
- European Union [824093]
- CERCA program of the Generalitat de Catalunya
This article reviews recent studies on the operator product expansion and gluon condensate, exploring methods such as perturbative expansion and hyperasymptotic expansion to increase accuracy. The results confirm expectations from renormalons and the operator product expansion.
We review recent studies of the operator product expansion of the plaquette and of the associated determination of the gluon condensate. One first needs the perturbative expansion to orders high enough to reach the asymptotic regime where the renormalon behavior sets in. The divergent perturbative series is formally regulated using the principal value prescription for its Borel integral. Subtracting the perturbative series truncated at the minimal term, we obtain the leading non-perturbative correction of the operator product expansion, i.e., the gluon condensate, with superasymptotic accuracy. It is then explored how to increase such precision within the context of the hyperasymptotic expansion. The results fully confirm expectations from renormalons and the operator product expansion.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据