Molecular picture for X0(2900) and X1(2900)

Inspired by the newly observed X-0(2900) and X-1(2900) states at LHCb, the K*(D) over bar* and K (D) over bar (1) interactions are studied in the quasipotential Bethe-Salpeter equation approach combined with the one-boson-exchange model. The bound and virtual states from the interactions are searched for as poles in the complex energy plane of scattering amplitude. A bound state with I(J(P)) = 0(0(+)) and a virtual state with 0(1(-)) are produced from the K*(D) over bar* interaction and K (D) over bar (1) interaction, and can be related to the X-0(2900) and X-1(2900) observed at LHCb, respectively. A bound state with I(J(P)) = 0(1(+)) and a virtual state with I(J(P)) = 0(2(+)) are also predicted from the K*(D) over bar* interaction, with the same alpha value, to reproduce the X-0,X-1(2900), which can be searched for in future experiments.

Automated summary

Inspired by the newly observed X-0(2900) and X-1(2900) states at LHCb, this study investigates the K*(D) over bar* and K (D) over bar (1) interactions, predicting bound and virtual states which can be related to the observed X-0(2900) and X-1(2900). The results suggest the existence of additional states that can be searched for in future experiments.