Understanding of the BESIII measurement of (anti)hyperon-nucleon scattering
Focusing on the recent measurements of the scattering processes Λ ¯ p → Λ ¯ p and Λ p → Λ p reported by BESIII, we offer a dynamical interpretation of the differences in the measured total and differential cross sections for both processes. This discrepancy arises because the u -channel contribution is forbidden for Λ ¯ p → Λ ¯ p but allowed for Λ p → Λ p . Additionally, we examine the enhancement effect in the forward angle region of the differential cross section for Λ ¯ p elastic scattering, attributed to the t -channel contribution. This work serves as a test to the scattering mechanism involved in these reactions.
Authors
- Xiang Liu (ORCID: https://orcid.org/0000-0001-7481-4662)
- Xiaoyun Wang (ORCID: https://orcid.org/0000-0002-5041-7264)
- Yuan Gao
Institutions
- Lanzhou University of Technology (CN)
- Institute of Modern Physics (CN)
- Lanzhou University (CN)
Publication Details
- Journal
- Physics Letters B
- Published
- 2025-02-13
- DOI
- https://doi.org/10.1016/j.physletb.2025.139321
- Citations
- 1
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 1.87
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Gansu Province
- Higher Education Discipline Innovation Project
- West Light Foundation of the Chinese Academy of Sciences
- Key Technologies Research and Development Program
- Fundamental Research Funds for the Central Universities