Speaker
Description
Tetraquarks are an important subject in hadronic physics. In this talk, we first present our study of $T_{c\bar{s}0}^{*}(2900)$. Based on the hidden local gauge symmetry, we construct an effective Lagrangian containing the light-flavor diquark–diquark-meson vertices. By solving the Bethe–Salpeter equation, we find that $T_{c\bar{s}0}^{*}(2900)$ can be interpreted as a mixture of hadronic molecule and diquark–antidiquark states.To further improve the previous method, we construct the effective Lagrangians containing the diquark–diquark–gluon vertex based on color gauge invariance. After that, we calculate the one-gluon-exchange potentials between the diquark and antidiquark using the above Lagrangians. The obtained potentials are consistent with the corresponding one-gluon-exchange potentials in the GI model. In future work, we will further apply this method to the study of other tetraquark states.
