2024/10/21 by Man-Yu Duan, Wen-Tao Lyu, Duan, Man-Yu +11
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2410.16078
openalex publication_date 2024/10/21 · openalex created_date 2024/11/13 · openalex updated_date 2026/07/28
We study from the theoretical point of view the Λc+→ π+ ηΛ reaction, recently measured by the Belle and BESIII Collaborations, where clear signals are observed for a0(980), Λ(1670), and Σ(1385) excitation. By considering the a0(980) and Λ(1670) as dynamically generated resonances from the meson meson and meson baryon interaction, respectively, we are able to determine their relative production strength in the reaction, which is also tied to the strength of the π+ ηΛ tree level contribution. We observe that this latter strength is very big and there are large destructive interferences between the tree level and the rescattering terms where the a0(980) and Λ(1670) are generated. The Σ(1385) contribution is included by means of a free parameter, the only one of the theory, up to a global normalization, when one considers only external emission, and we observe that the spin flip part of this term, usually ignored in theoretical and experimental works, plays an important role determining the shape of the mass distributions. Internal emission is also considered and it is found to play a minor role.