Abstract
We consider the possibility of constructing off-shell amplitudes and currents in the conventional dual model. We determine the necessary form for a current which incorporates the current algebra constraints in addition to the constraints arising from duality and factorization. The current consists of two parts—an off-shell amplitude and a part that exhibits the current algebra properties. We prove that a dual, factorizable off-shell amplitude which has the same spectrum as the conventional on-shell dual-resonance model does not exist.
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