2024/04/08 by Haonan Wang, Wang, Hao-Nan, Li‐Sheng Geng +5
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.2404.05114
openalex publication_date 2024/04/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We have phenomenologically investigated the decays Bs0 → X(3872) π+π- (K+ K-) and Bs0 → ψ(2S) π+ π- (K+K-). In our analysis, the scalar meson f0(980) is formed through the final state interactions of coupled channels ππ and KK. Our findings indicate that the π+π- invariant mass distribution of the Bs0 → ψ(2S)π+π- decay can be accurately reproduced. Furthermore, we have explored the π+π- (K+ K-) invariant mass distribution of the Bs0 → X(3872) π+π- (K+ K-) decay, accounting for the different production mechanisms between X(3872) and ψ(2S), up to a global factor. It is found that the production rates for X(3872) and ψ(2S) are much different, which indicates that the structure of X(3872) is more complicated than the ψ(2S), which is a conventional cc state. Additionally, we have considered the contributions from f0(1500) to π+π- and the ϕ meson to K+ K- in our analysis. Utilizing the model parameters, we have calculated the branching fraction of Bs0 → X(3872) K+ K-, and anticipate that the findings of our study can be experimentally tested in the future.