2024/04/02 by Y. T. Tan, Xuejie Liu, Tan, Yue +9
Physics and Astronomy · #Black Holes and Theoretical Physics #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.2404.02048
openalex publication_date 2024/04/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Inspired by that Belle\uppercase\expandafter\romannumeral2 Collaboration recently reported Tcc, which can be interpreted as a molecular DD*, we investigated the trihadron system of Tcc partner with IJP=01- in the framework of a chiral quark model. It's widely accepted that the main component of X(3872) contains the molecular DD*, while the main component of Ds0*(2317) is molecular DK. Based on these three well-known exotic states, Tcc (DD*), X(3872) (DD*) and Ds0*(2317) (DK), we dynamically investigate D*DK and DD*D systems at quark level to search for possible bound states. The results show that both of them are bound states, in which the binding energy of the molecular state DD^*K is relatively small, only 0.8 MeV, while the binding energy of DD^*D is up to 1.9 MeV. According to the calculation results of the Root-square-mean distances, the spatial structure of the two systems shows obvious (DD^*)-(D/K) structure, in which D is close to D^* while DD^* as a whole is relatively distant from the third hadron (D/K), which are similar to the nucleon-electron structure. As a result, we strongly recommend that these bound states DD^*D and DD^*K are searched for experimentally.