Meson-meson interactions and Regge propagators

Understand

By a reformulation of the loop expansion in the Resonance-Spectrum-Expansion amplitude for meson-meson scattering, in terms of s-channel exchange of families of propagator modes, we obtain a formalism which allows for a wider range of applications.

• The connection with the unitarized amplitudes employed in some chiral theories is discussed.
• We also define an alternative for the Regge spectra and indicate how this may be observed in experiment.