Ordered hadron S-Matrix - Chew, G.F.; Finkelstein, J.; Sursock, J.-P.; Weissmann, G. (Elsevier)
An ordered hadron S-matrix is developed that accommodates an arbitrary number of ''neighbors'' for each particle. Automatic features are baryon-number conservation and zero triality. The ordered Hilbert space splits into a set of non-communicating sectors each characterized by a ''skeleton'' graph whose external edges can be given aquark interpretation. Selection rules are found that generalize the OZI rules.
http://linkinghub.elsevier.com/retrieve/pii/0550-3213(78)90272-9
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