New Look at Hidden Charm Tetra and Pentaquark States

The work presents the analysis of the hidden charm P-wave tetraquarks in the diquark model, using an effective Hamiltonian incorporating the dominant spin–spin, spin–orbit and tensor interactions. We compare them with other P-wave systems such as P-wave charmonia and the newly discovered c baryons, analyzed recently in this framework. The experimental situation on the Y -states is not certain, therefore, by using different spectra a detailed discussion of the parameters related to the diquark model is presented. Using the parameters from the currently preferred Y -states pattern, we work out the spin-parity, JPC, and mass spectrum for many states in the hidden charm P-wave supermultiplet. We hope in future when there will be an experimental consensus on different Y -states, an observation of these new resonances would be a decisive footprint of the underlying diquark dynamics.