Revisiting the Λ_c⁺→ Ληπ⁺ and the roles of intermediate resonances

2025/07/18 by En Wang, Wen-Tao Lyu, Wang, En +11
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2507.13738

openalex publication_date 2025/07/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In this paper, we first review the theoretical and experimental studies of the process Λ_c⁺ → π⁺ ηΛ. Motivated by the recent BESIII and Belle measurements, we have conducted a theoretical study of the process Λ_c⁺ → π⁺ ηΛ, where the a₀(980) and Λ(1670) resonances are dynamically generated from the S-wave meson meson and meson baryon interaction, respectively. Our results give a reasonable description of the invariant mass distributions, which implies that the spin flip contribution in the Σ(1385) excitation plays an important role.

Related

• The Λ_c⁺→ηπ⁺Λ reaction and the Λa₀⁺(980) and π⁺Λ(1670) contributions
• The Λ_c⁺→Λπ⁺π⁺π^- reaction, and a triangle singularity producing the Σ^*(1430) state
• Revisiting the Λ_c⁺→K⁰ηp reaction: the role of N^*(1535),~ N^*(1650) and Σ(1620)
• Role of Σ^*(1/2^-) baryons in Λ_c→ Λπ⁺π⁺π^- decay
• Theoretical study of the N(1535) in the process Λ_c⁺→ nπ⁺π⁰