Bethe-Schwinger Effective Range Theory and Lehmann and Weinberg Chiral Perturbation Theories

Details Bethe-Schwinger Effective Range Theory and Lehmann and Weinberg Chiral Perturbation Theories Bethe-Schwinger Effective Range Theory and Lehmann and Weinberg Chiral Perturbation Theories

2010-02-12

arxiv.org/abs/1002.2519v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 3 figures. To be publised in the proceeding of International Conference on flavor physics (2009), Hanoi

Scientific paper

This paper is a brief review of low energy soft hadronic physics, starting from the invention of the low energy effective range theory in the late 40's due to Bethe and Schwinger for nucleon-nucleon scattering, and its generalization to the static Chew-Low model for pion nucleon scattering, to the present development of the Lehmann and Weinberg Chiral Perturbation Theories. It is pointed out that a consistent low energy calculation can be achieved with the incorporation of the unitarity relation in the Chiral Perturbation Theory.

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