Exchange degenerate Regge trajectories : a fresh look from resonance and forward scattering regions

ThéorieThe exchange-degeneracy of the mesonic $f-, \omega -, \rho -$ and $a_{2}-$ Regge trajectories dominant at moderate and high energies in hadron elastic scattering is analyzed from two viewpoints. The first concerns the masses of the resonances lying on these trajectories the second deals with the total cross-sections of hadron and photon induced reactions. Neither set of data supports exact exchange-degeneracy