  It is seen by a coupled-channel calculation that in the two-baryon N-Delta or
Delta-Delta system the width of the state is greatly diminished due to the
relative kinetic energy of the two baryons, since the internal energy of the
particles, available for pionic decay, is smaller. A similar state dependent
effect arises from the centrifugal barrier in N-Delta or Delta-Delta systems
with non-zero orbital angular momentum. The double-Delta width can become even
smaller than the free width of a single Delta. This has some bearing to the
interpretation of the d'(2380) resonance recently discovered at COSY.
