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Dynamical understanding of the first measurement of (anti)hyperon-nucleon scattering from BESIII

Authors :
Wang, Xiao-Yun
Gao, Yuan
Liu, Xiang
Publication Year :
2024

Abstract

Focusing on the recent measurements of the scattering processes $\bar{\Lambda} p \rightarrow \bar{\Lambda} p$ and $\Lambda p \rightarrow \Lambda p$ 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 $\bar{\Lambda} p \rightarrow \bar{\Lambda} p$ but allowed for $\Lambda p \rightarrow \Lambda p$. Additionally, we examine the enhancement effect in the forward angle region of the differential cross section for $\bar{\Lambda} p$ elastic scattering, attributed to the $t$-channel contribution. This work serves as a test to the scattering mechanism involved in these reactions.<br />Comment: 4 pages, 4 figures, 1 tables

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2410.17842
Document Type :
Working Paper