Assuming that Ds0*(2317) is a DK molecular state with a binding energy of 45 MeV, we investigate the existence of four-hadron molecules, DDKK and DD¯KK¯, with the Gaussian expansion method. Their binding energies are 138–155 MeV and 123–163 MeV below the mass thresholds of DDKK and DD¯KK¯. The DD¯KK¯ state has a decay width of 74–107 MeV due to the complex KK¯ interaction. Further theoretical studies of and experimental searches for such four-hadron molecules can help deepen the understanding of the nonperturbative strong interaction in a nontrivial way.
Published by the American Physical Society
2024