2023/10/20 by Hee‐Jin Kim, Kim, Hee-Jin, Hyun-Chul Kim +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2310.13370
openalex publication_date 2023/10/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We investigate the dynamical generation of the Ds0^*(2317) and Bs0^* mesons using a meson-exchange model with a coupled-channelformalism. Our primary focus is on the Ds+π0 channel below the DK threshold. First, we construct the invariant kernel amplitudes, incorporating effective Lagrangians based on heavy-quark symmetry, flavor SU(3) symmetry, and hidden local symmetry. Since the Ds0^*(2317) state implies isospin symmetry breaking, we introduce π0-η isospin mixing. We subsequently solve the coupled-channel integral equations, which include four different channels, i.e., Ds+π0, D0 K+, D+ K0, and Ds+η. We carefully analyze how the pole corresponding to the Ds0^*(2317) state emerges from the coupled channels. Our findings reveal that the pole positions of the Ds0^*(2317) meson are at √(sR)=(2317.9 - i 0.0593) MeV and the Bs0^* meson at (5756.43-i0.0215) MeV, respectively. We also discuss their decay widths and destructive interference of the two sources. In conclusion, our current results provide a clear indication supporting the interpretation of the Ds0^*(2317) meson as a DK molecular state within the present coupled-channel formalism. In addition, we discuss a possible existence of Bs0*.