Orateur
Prof.
Nils Elander
(AlbaNova Univ. Ctr., Stockholm University, Sweden)
Description
In my talk will describe how resonance trajectories appear and how they are bounded on the complex energy plane. I will then introduce the mathematical spectral function and the spectral density. From there I will describe how the spectral density can be partitioned into contributions from uncovered resonances and the free particle spectral density. I will then turn to scattering cross section and discuss the influence of resonances on the cross section through a construction of a reduced partial wave S-matrix and a reduced partial wave cross section. This enables me to show that the Breit-Wigner formalism is not fully appropriate to describe a partial wave S-matrix and partial wave cross section.
Author
Prof.
Nils Elander
(AlbaNova Univ. Ctr., Stockholm University, Sweden)
