Hyperon forward spin polarizabilty gamma0
K.B. Vijaya Kumar, Amand Faessler, Thomas Gutsche, Barry R. Holstein,, Valery E. Lyubovitskij
TL;DR
This paper calculates the forward spin polarizability gamma0 of hyperons using SU(3) heavy baryon chiral perturbation theory, extending previous nucleon results and including kaon loops.
Contribution
It provides a systematic leading order calculation of hyperon gamma0 within SU(3) HBChPT, incorporating kaon loops for the first time.
Findings
Gamma0 results agree with SU(2) HBChPT for nucleons without kaon loops.
First calculation of hyperon gamma0 including kaon loop effects.
Extends understanding of hyperon spin polarizabilities in chiral perturbation theory.
Abstract
We present the results of a systematic leading order calculation of hyperon Compton scattering and extract the forward spin polarizability gamma0 of hyperons within the framework of SU(3) heavy baryon chiral perturbation theory (HBChPT). The results obtained for gamma0 in the case of nucleons agree with that of the known results of SU(2) HBChPT when kaon loops are not considered.
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