Pole structure from energy-dependent and single-energy fits to GWU-SAID π N elastic scattering data
Abstract
The pole structure of the current George Washington University (GWU-SAID) partial-wave analysis of elastic π N scattering and η N production data is studied. Pole positions and residues are extracted from both the energy-dependent and single-energy fits, using two different methods. For the energy-dependent fits, both contour integration and a Laurent + Pietarinen approach are used. In the case of single-energy fits, the Laurent+Pietarinen approach is used. Errors are estimated and the two sets of results are compared to other fits to data.
- Publication:
-
Physical Review C
- Pub Date:
- January 2015
- DOI:
- arXiv:
- arXiv:1405.6474
- Bibcode:
- 2015PhRvC..91a5207A
- Keywords:
-
- 11.55.Bq;
- 11.55.Fv;
- 14.20.Gk;
- Analytic properties of S matrix;
- Dispersion relations;
- Baryon resonances with S=0;
- Nuclear Theory
- E-Print:
- 12 pages,5 tables,2 figures. arXiv admin note: substantial text overlap with arXiv:1401.1947, arXiv:1404.1544