Speaker
Description
Recent Lattice QCD (LQCD) simulations have confirmed an attractive interaction in the isoscalar $DD^*$ channel, which is naturally associated with the $T_{cc}(3875)^+$ state observed by LHCb in the $D^0D^0\pi^+$ spectrum. However, the connection between the virtual bound state predicted by LQCD and the experimental signal remains an open question. In this talk, we present an Effective Field Theory (EFT) analysis of LQCD data, showing that a consistent chiral extrapolation leads to a $T_{cc}$ pole compatible with experiment. Additionally, we explore the light and heavy quark mass dependence of the $T_{cc}$ pole and discuss the role of $\rho$ and $\pi$ meson exchanges.
Furthermore, we extend our study to include a comparative analysis between the $T_{cc}(3875)^+$ and the $\chi_{c1}(3872)$, investigating possible universal behaviors and differences in their quark mass dependence. This combined approach provides deeper insights into the nature of near-threshold exotic hadrons and their relation to LQCD predictions.