Resonance parameters from K-matrix and T-matrix poles

Details Resonance parameters from K-matrix and T-matrix poles Resonance parameters from K-matrix and T-matrix poles

2008-08-15

arxiv.org/abs/0808.2176v2

Phys.Rev.C79:038201,2009

Physics

Nuclear Physics

Nuclear Theory

11 pages, 1 figure

Scientific paper

10.1103/PhysRevC.79.038201

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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