Perturbative versus non-perturbative QFT lessons from the O(3) NLS model

被引：12

作者：

Balog, J ^{[1
]}

Niedermaier, M ^{[1
]}

Hauer, T ^{[1
]}

机构：

[1] MIT, CTR THEORET PHYS, NUCL SCI LAB, CAMBRIDGE, MA 02139 USA

来源：

PHYSICS LETTERS B | 1996年 / 386卷 / 1-4期

关键词：

D O I：

10.1016/0370-2693(96)00906-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The two-point functions of the energy-momentum tensor and the Noether current are used to probe the O(3) nonlinear sigma model in an energy range below 10(4) in units of the mass gap m. We argue that the form factor approach, with the form factor series truncated at the 6-particle level, provides an almost exact solution of the model in this energy range. The onset of the (2-loop) perturbative regime is found to occur only at energies around 100m.

引用

页码：224 / 232

页数：9

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