Scattering phases in the broken phase of the 4-d O(4) non-linear sigma-model

J. Westphalen; F. Zimmermann; M. Goeckeler; H. A. Kastrup

doi:10.1016/0920-5632(94)90448-0

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arXiv · hep-lat/9312040

Scattering phases in the broken phase of the 4-d O(4) non-linear sigma-model

J. Westphalen·F. Zimmermann·M. Goeckeler·H. A. Kastrup

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Abstract

Using Luescher's method we determine the elastic scattering phases in the broken phase of the 4-dimensional O(4) non-linear sigma-model from the two-particle energy spectrum in a Monte-Carlo study on finite lattices. In the isospin-0-channel we observe the sigma-resonance and extract its mass and its width. In all scattering channels investigated the results are consistent with perturbative calculations.

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J. Westphalen, F. Zimmermann, M. Goeckeler, H. A. Kastrup. 1993-12-09. Scattering phases in the broken phase of the 4-d O(4) non-linear sigma-model. https://doi.org/10.1016/0920-5632(94)90448-0

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