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arXiv · 0808.2176

Resonance parameters from K-matrix and T-matrix poles

R. L. Workman·R. A. Arndt·M. Paris
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Abstract

We extract K-matrix poles from our fits to elastic pion-nucleon scattering and eta-nucleon production data in order to test a recently proposed method for the determination of resonance properties, based on the trace of the K-matrix. We have considered issues associated with the separation of background and resonance contributions, the correspondence between K-matrix and T-matrix poles, and the complicated behavior of eigenphases.

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R. L. Workman, R. A. Arndt, M. Paris. 2009-02-11. Resonance parameters from K-matrix and T-matrix poles. https://doi.org/10.1103/physrevc.79.038201

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