Speaker
Prof.
Oller Jose Antonio
(Universidad de Murcia)
Description
We elaborate on the compositeness relation for poles in the two-body scattering amplitudes, and discuss different methods to calculate the compositeness of a resonance and bound state. We study in detail the case of validity of the effective-range expansion for near-threshold poles and its limitations, providing then a more general parameterization from S-matrix theory. The application of these results to different states is also discussed.
Author
Prof.
Oller Jose Antonio
(Universidad de Murcia)
