GRAPHICAL DUALITY AND THE ALGEBRA OF VERTEX STRENGTHS.

Abstract We prove that the Regge exchange part of Im A ( s , t ) in graphical duality is given exactly by symmetric [U(3) × U(3)] β “CHN” couplings. Adopting the physical picture implied by graphical duality thus requires the adjunction of a nineteenth operator in CHN, to represent the diffractive contribution. We introduce a Casimir operator which reproduces the Levin-Frankfurt ratio of σ tot (NN): σ tot ( π N) → 3:2. We examine the experimental situation in that light.