Understanding of the BESIII measurement of (anti)hyperon-nucleon scattering

Abstract

Focusing on the recent measurements of the scattering processes $\bar{\Lambda }p\to \bar{\Lambda }p$ and $\Lambda p\to \Lambda p$ 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 $\bar{\Lambda }p\to \bar{\Lambda }p$ but allowed for $\Lambda p\to \Lambda p$. 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.

4 pages, 4 figures, 1 tables

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Cited by in corpus (3)

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• Analysis of $J/\psi$ and $\psi (2S)$ Charmonium Production in Ultraperipheral Lead-Lead and Proton-Lead Collisions at LHC Energies
• Proposed mixing between $2P$ and $1F$ wave charmonia