The application of unitarity to multiparticle production processes is studied and relationships between production and scattering amplitudes are derived.

Brief Reports------Brief Reports are short papers which report on completed research which. while meeting ~h e usual Physical Review standards of srientific quality, does not warrant a regular article. (Addenda to papers preuiously published in the Physical Review by the same authors are included in Brief Reports.) A Brief'Report may be no longer than 3f printed pnges and must be accompanied by an abstract. The same publication schedule as for regular articles is followed, and page proOfS are sent to authors.A method based on a modified eigenchannel formalism is proposed for discovering broken symmetries from experimental coupled-channel scattering data. The method suggests that the low-energy I = S-wave TN-VN coupled-channel system and the low-energy

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We have obtained the generating function for Chew–Mandelstam functions for arbitrary integral angular momentum. From this a closed formula for the Chew–Mandelstam functions is derived in both the simple equal mass case and in the more complicated case of unequal masses.