2022/11/28 by Haonan Wang, Wang, Hao-Nan, Li‐Sheng Geng +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2211.14994
openalex publication_date 2022/11/28 · openalex created_date 2022/12/10 · openalex updated_date 2026/07/28
We investigate the decays of B0 → K0 X(3872) and B+ → K+ X(3872) based on the picture where the X(3872) resonance is strongly coupled to the DD^* + c.c. channel. In addition to the decay mechanism where the X(3872) resonance is formed from the cc pair hadronization with the short-distance interaction, we have also considered the DD^* rescattering diagrams in the long-distance scale, where D and D^* are formed from c and c separately. Because of the difference of the mass thresholds of charged and neutral DD^* channels, and the rather narrow width of the X(3872) resonance, at the X(3872) mass, the loop functions of D0D*0 and D+D*- are much different. Taking this difference into account, the ratio of B[B0→ K0X(3872)]/B[B+ → K+ X(3872)] ≃ 0.5 can be naturally obtained. Based on this result, we also evaluate the decay widths of Bs0 → η(η') X(3872). It is expected that future experimental measurements of these decays can be used to elucidate the nature of the X(3872) resonance.