Size measurement of dynamically generated resonances with finite boxes

Understand

The structure of dynamically generated states is studied from a viewpoint of the finite volume effect.

• We establish the relation between the spatial size of a stable bound state and the finite volume mass shift.
• In a single-channel scattering model, this relation is shown to be valid for a bound state dominated by the two-body molecule component.
• We generalize this method to the case of a quasi-bound state with finite width in coupled-channel scattering.