2024/12/29 by Natsumi Ikeno, Ikeno, Natsumi, Jia, Wen-Hao +4
Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2412.20399
openalex publication_date 2024/12/29 · openalex created_date 2025/01/01 · openalex updated_date 2026/07/30
We study the D0 → ρ0 ϕ, ωϕ decays which proceed in a direct mode via internal emission with equal rates. Yet, the experimental branching ratio for the ρ0 ϕ mode is twice as big as that for the ωϕ mode. We find a natural explanation based on the extra indirect mechanism where K*+ K*- is produced via external emission and that channel undergoes final state interaction with other vector--vector channels to lead to the ρ0 ϕ, ωϕ final states, with transition amplitudes dominated by the a0(1710) resonance, recently discovered, and f0(1710) respectively. The large coupling of the a0(1710) to the ρ0 ϕ channel is mostly responsible for this large ratio of the production rates.