2025/08/18 by Zuo-Ming Ding, Qi Huang, Ding, Zuo-Ming +3
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.2508.12686
openalex publication_date 2025/08/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This study investigates the three-body decay process B+ → D*+ D- K+, aiming to explore the possible origins of T^*_cs0(2870)0 and χc1(3872) as intermediate states. Within the molecular state framework, T^*_cs0(2870)0 and χc1(3872) are considered as possible D*K and D^*D molecular states, respectively. Using effective Lagrangians, the interaction kernels of the D*K* and D^*D systems are constructed within the one-boson-exchange model. The corresponding rescattering amplitudes and pole positions are obtained by solving the quasipotential Bethe-Salpeter equation. These amplitudes are incorporated into the decay amplitude of the three-body process, and the D-K+ and D*+D- invariant mass spectra are simulated via Monte Carlo methods. To better reproduce the experimental data, additional Breit-Wigner contributions from T^*_cs1(2900)0, χc1(4010), and hc(4300) are included. The results show a pronounced enhancement near 2900 MeV in the D-K+ invariant mass spectrum, strongly supporting the interpretation of T^*_cs0(2870)0 as a D*K* molecular state. While the D*K* molecular state provides a reasonable contribution to the D-K+ spectrum, the D^*D molecular state yields no significant effect on either the D-K+ or D*+D- distributions. This suggests that the observed χc1(3872) structure around 3872 MeV may not be interpreted as a D^*D molecular state.