Regular Article - Theoretical Physics
How to understand the X(2900)?
School of Physical Science and Technology, Hebei University, 071002, Baoding, China
2 Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, 071002, Baoding, China
3 School of Physics and Center of High Energy Physics, Peking University, 100871, Beijing, China
Accepted: 29 April 2022
Published online: 9 May 2022
In this work, the S- and P-wave interactions are studied in a coupled-channel formalism to understand the recently observed and at LHCb. The experimental event distributions can be well described, and two states with and are yielded in a unified framework. The masses of the and states are consistent with the experimental data, but the width of the state is larger than that of the one. The can be interpreted as the P-wave excitation of the ground-state in the hadronic molecular picture. The S- and P-wave multiplets in the system have many members, so the present peak in the invariant mass distributions might contain multi substructures.
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