Molecular states of D∗D∗ K ¯ ∗ nature

We study the interaction of two D∗ and a K̄∗ by using the fixed center approximation to the Faddeev equations to search for bound states of the three-body system. Since the D∗D∗ interaction is attractive and gives a bound state, and so is the case of the D∗K̄∗ interaction, where the JP=0+ bound state is identified with the X0(2900), the D∗D∗K̄∗ system leads to manifestly exotic bound states with ccs open quarks. We obtain bound states of isospin I=1/2, negative parity and total spin J=0, 1, 2. For J=0 we obtain one state, and for J=1, 2 we obtain two states in each case. The binding energies range from 56 to 152 MeV and the widths from 80 to 100 MeV.This work is partly supported by the Spanish Ministerio de Economía y Competitividad (MINECO) and European FEDER funds under Contract No. PID2020–112777 GB-I00, and by Generalitat Valenciana under Contract No. PROMETEO/ 2020/023. This project has received funding from the European Union Horizon 2020 research and innovation program under the program H2020-INFRAIA-2018-1, Grant Agreement No. 824093 of the STRONG-2020 project