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

J. Balog, M. Niedermaier, T. Hauer

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

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 104 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.

Original languageEnglish
Pages (from-to)224-232
Number of pages9
JournalPhysics Letters B
Volume386
Issue number1-4
Publication statusPublished - Oct 3 1996

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form factors
energy
kinetic energy
tensors
probes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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Perturbative versus non-perturbative QFT lessons from the O(3) NLS model. / Balog, J.; Niedermaier, M.; Hauer, T.

In: Physics Letters B, Vol. 386, No. 1-4, 03.10.1996, p. 224-232.

Research output: Contribution to journalArticle

Balog, J, Niedermaier, M & Hauer, T 1996, 'Perturbative versus non-perturbative QFT lessons from the O(3) NLS model', Physics Letters B, vol. 386, no. 1-4, pp. 224-232.
Balog, J. ; Niedermaier, M. ; Hauer, T. / Perturbative versus non-perturbative QFT lessons from the O(3) NLS model. In: Physics Letters B. 1996 ; Vol. 386, No. 1-4. pp. 224-232.
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