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Heavy Baryon Spin 3/2 Theory and Radiative Decays of the Decuplet

M. Napsuciale·J. L. Lucio M.
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Abstract

We study the radiative decays of the decuplet $(3/2 \to 1/2 γ)$ using Heavy Baryon Chiral Perturbation Theory (HBChPT). We emphasize the problems faced by the interacting spin 3/2 field theory. We argue that, to lowest order in the $1/m$ expansion, HBChPT provides a framework where R-invariance and the appropiated constraints for the interacting spin 3/2 fields are consistently incorporated. We perform a gauge invariant calculation of the decay amplitudes, to lowest order in $1/m$ and to order $w^2/Λ^2_χ$ in the chiral expansion and report analytical results for the one-loop contributions to the two form factors involved in the $3/2 \to 1/2 γ$ transitions. Parameters independent predictions for the SU(3) forbidden decays are presented.

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M. Napsuciale, J. L. Lucio M.. 1996-09-04. Heavy Baryon Spin 3/2 Theory and Radiative Decays of the Decuplet. https://doi.org/10.1016/s0550-3213(97)00097-7

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