Double-charm heptaquark states composed of two charmed mesons and one nucleon

Abstract

Inspired by the experimental discoveries of T cc , Σ c (2800), and Λ c (2940) and the theoretical picture where they are DD * , DN, and D * N molecular candidates, we investigate the double charm heptaquark system of DD * N. We employ the one-boson-exchange model to deduce the pairwise D-D * , D-N, and D * -N potentials and then study the DD * N system with the Gaussian expansion method. We find two good hadronic molecular candidates with) and 1 2 ( 3 2 − ) DD * N with only s-wave pairwise interactions. The conclusion remains unchanged even taking into account the S -D mixing and coupled channel effects. In addition to providing the binding energies, we also calculate the root-mean-square radii of the DD * N system, which further support the molecular nature of the predicted states. They can be searched for at the upcoming LHC run 3 and run 4.

Faddeev fixed-center approximation to the $ηK^*\bar{K}^*$, $πK^*\bar{K}^*$ and $KK^*\bar{K}^*$ systems

“…Indeed, there is growing evidence that some existing and new observed hadronic states could be interpreted in terms of resonances or bound states of three hadrons [17][18][19]. Furthermore, some new states are also predicted in three-body systems [20][21][22]. For example, DKK and DK K systems were studied in Ref.…”