Investigation of the tetraquark states In the Improved Chromomagnetic Interaction Model
Tao Guo (School of Mathematics and Physics, Chengdu University of Technology, China); Jianing Li (Department of Physics, Tsinghua University, China); Jiaxing Zhao (SUBATECH, Université de Nantes, IMT Atlantique, IN2P3/CNRS, 4 rue Alfred Kastler, France); Lianyi He (Department of Physics, Tsinghua University, China)
In the framework of the improved chromomagnetic interaction model, we complete a systematic study of the S-wave tetraquark states $ Qq\bar{Q}\bar{q} $ ( $ Qq\bar{Q}\bar{q} $ , and $ Qq\bar{Q}\bar{q} $ ) with different quantum numbers: $ Qq\bar{Q}\bar{q} $ , $ Qq\bar{Q}\bar{q} $ , and $ Qq\bar{Q}\bar{q} $ . The mass spectra of tetraquark states are predicted, and the possible decay channels are analyzed by considering both the angular momentum and $ Qq\bar{Q}\bar{q} $ -parity conservation. The recently observed hidden-charm tetraquark states with strangeness, such as $ Qq\bar{Q}\bar{q} $ , $ Qq\bar{Q}\bar{q} $ , and $ Qq\bar{Q}\bar{q} $ , can be well explained in our model. Additionally, according to the wave function of each tetraquark state, we find that the low-lying states of each $ Qq\bar{Q}\bar{q} $ configuration have a large overlap to the $ Qq\bar{Q}\bar{q} $ and $ Qq\bar{Q}\bar{q} $ meson basis, instead of the $ Qq\bar{Q}\bar{q} $ and $ Qq\bar{Q}\bar{q} $ meson basis. This indicates that one can search these tetraquark states in future experiments via the channel of $ Qq\bar{Q}\bar{q} $ and $ Qq\bar{Q}\bar{q} $ mesons.