2024/10/17 by Yan Dai, Dai, Yan, Aojia Xu +7
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2410.13207
openalex publication_date 2024/10/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We conducted a theoretical study on the process Σ+ p →Λa0+ p based on an effective Lagrangian approach. This model encompasses the excitation of intermediate states leading to the production of Δ(1920) through π+ and K+ meson exchanges between the initial Σ+ baryon and the initial proton p, as well as the generation of Δ(1940) via π+ and ρ+ meson exchanges. We provide predictions for the total and differential cross sections and discuss the potential impacts of cutoff parameters, off-shell effects, and branching ratios on the Δ∗ → a0 p decay. Given the dominance of Δ(1940) in the region close to the reaction threshold, this reaction is considered an ideal platform for deeply exploring the unique properties of the Δ(1940) resonance. Through this approach, we can gain a more precise understanding of the intrinsic characteristics of this particle.