Shape-Resonance in Spectral density, Scattering Cross-section, Time delay and Bound on Sojourn time

Hemant Bansal, Alok Maharana, Lingaraj Sahu +1

The Friedrichs model~\cite{Friedrichs} is revisited to obtain precise results about the asymptotic behaviour (the so-called Breit-Wigner formula~\cite{Breit}) of a resonance near a…