Classical and spin polarizabilities of singly heavy baryons within heavy baryon chiral perturbation theory

TL;DR

This paper calculates electromagnetic and spin polarizabilities of singly heavy baryons using heavy baryon chiral perturbation theory, revealing small higher-order electric polarizability corrections and larger magnetic ones, with notable differences from nucleons.

Contribution

It provides the first systematic calculation of polarizabilities of singly heavy baryons at (p^4) order within heavy baryon chiral perturbation theory, including bottom baryons.

Findings

Higher-order electric polarizability corrections are small.

Magnetic polarizability corrections are larger due to small mass splitting.

Spin polarizabilities are generally smaller than those of nucleons.

Abstract

We present a systematic study of the electromagnetic and spin polarizabilities of spin-1/2 singly charmed baryons at $\mathcal{O}(p^4)$ within the framework of heavy baryon chiral perturbation theory. Our results show that the higher-order corrections to the electric polarizability are small, while those to the magnetic polarizability are relatively larger due to the small mass splitting of singly charmed baryons and are closely related to transition magnetic moments. Furthermore, we find that the spin polarizabilities of singly charmed baryons, except for $\gamma_{M1M1}$, are much smaller than those of the nucleons. We have also calculated the polarizabilities for singly bottom baryons, with the results showing generally larger values than those of singly charmed baryons.