The intrinsic coupling in integrable quantum field theories

被引：18

作者：

Balog, J ^{[1
]}

Niedermaier, M

Niedermayer, F

Patrascioiu, A

Seiler, E

Weisz, P

机构：

[1] Res Inst Particle & Nucl Phys, H-1525 Budapest 114, Hungary

[2] Univ Pittsburgh, Dept Phys, Pittsburgh, PA 15260 USA

[3] Univ Bern, Inst Theoret Phys, CH-3012 Bern, Switzerland

[4] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[5] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

来源：

NUCLEAR PHYSICS B | 2000年 / 583卷 / 03期

基金：

美国国家科学基金会;

关键词：

integrable systems; Bethe ansatz; form factors; Ising model; XY-model; O(3) sigma-model;

D O I：

10.1016/S0550-3213(00)00277-7

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The intrinsic 4-point coupling, defined in terms of a truncated 4-point function at zero momentum, provides a well-established measure for the interaction strength of a QFT. We show that this coupling can be computed non-perturbatively and to high accuracy from the form factors of an (integrable) QFT. The technique is illustrated and tested with the Ising model, the XY-model and the O(3) nonlinear sigma-model. The results are compared to those from high precision lattice simulations. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：614 / 670

页数：57

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