Field theory of nucleon to higher-spin baryon transitions
V. Pascalutsa, R. G. E. Timmermans
Abstract
We discuss the nucleon to higher-spin N- and Δ-resonance transitions by pions and photons. The higher-spin baryons are described by Rarita-Schwinger fields and, as we argue, this imposes a stringent consistency requirement on the form of the couplings. Popular πNΔ and γNΔ couplings are inconsistent from this point of view. We construct examples of consistent interactions with the same nonrelativistic limit as the conventional ones.
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