Abstract
The kinematic singularities and threshold relations of helicity amplitudes for inelastic pion-nucleon scattering involving higher baryons in the final state are discussed. A recipe for writing the s- and t- channel helicity amplitudes is obtained using Wigner-Bargmann formalism. Explicit expressions for helicity amplitudes are worked out for the processes where the final state baryon has spin 32 or 52.
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