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Purely baryonic weak decays of heavy baryons in a Skyrme model

Chao-Qiang Geng* and Chao Han†

  • School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China

  • *Contact author: cqgeng@ucas.ac.cn
  • †Contact author: hbarc@ucas.ac.cn
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Phys. Rev. C 114, 015204 – Published 16 July, 2026

DOI: https://doi.org/10.1103/6mwr-98zh

Abstract

Purely baryonic weak decays of heavy baryons are investigated within the framework of the Skyrme model. These decays belong to a new class of unobserved decay channels, which would help us to test the standard model, particularly potential sources of CP violation in the baryonic sector. By interpreting the heavy baryon as a bound state of a heavy meson and a baryon (Skyrmion), a direct calculation of the decay process Λb→pp¯n is performed. The resulting branching fraction is of O(10−6), in agreement with previous estimates.

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Phys. Rev. C 114, 015204– Published 16 July, 2026
  • Received 17 March 2026
  • Accepted 30 June 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

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