| exchange degeneracy [iks`chānj dē`jen·ǝ·rǝ·sē] PARTICLE PHYSICS Coincidence of two Regge trajectories for particles having the same quantum numbers (except for parity, charge parity, and G parity) where one would have expected separate trajectories for alternate Regge recurrences. QUANTUM MECHANICS An exchange process that leads back to the original configuration. Also known as exchange symmetry. |