Speaker
Description
Recent accelerator experiments have reported unexpected states known as exotic hadrons, whose properties cannot be explained by the conventional picture, mesons and baryons. In the heavy quark sector, $XYZ$, $T_{cc}$, $P_c$ etc. have been reported since the discovery of $X(3872)$. There have been many exotic hadrons located near the hadron threshold, and thus loosely hadron bound states called hadronic molecules have been considered. In the heavy hadron sector, the heavy quark symmetry is important, which induces channel coupling effects and also predicts spin partner states. In this talk, we study hadronic molecules of heavy hadrons such as $T_{cc}$. We study bound state properties of hadronic molecules and also discuss partner states of these exotics, predicted by symmetries.
