Prediction of new Tcc states of D* D* and Ds*D* molecular nature

We extend the theoretical framework used to describe the T-cc state as a molecular state of D* D and make predictions for the D* D* and D-s(*) D) systems, finding that they lead to bound states only in the J(P) = 1+ channel. Using input needed to describe the T-cc state, basically one parameter to regularize the loops of the Bethe-Salpeter equation, we find bound states with bindings of the order of MeVand similar widths for the D*D* system, while the D*s D-* system develops a strong cusp around the threshold.

Automated summary

In this study, we extended the theoretical framework to describe the T-cc state as a molecular state of D* D and made predictions for the D* D* and D-s(*) D) systems. We found that bound states only exist in the J(P) = 1+ channel. Additionally, by using input parameters to regularize the loops of the Bethe-Salpeter equation, we observed different binding energies and widths for the D*D* and D*s D-* systems.