A new look at the Y tetraquarks and baryons in the diquark model

We analyze 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 with other P -wave systems such as P -wave charmonia and the newly discovered baryons, analysed recently in this framework. Given the uncertain experimental situation on the Y states, we allow for different spectra and discuss the related parameters in the diquark model. In addition to the presently observed ones, we expect many more states in the supermultiplet of diquarkonia, whose quantum numbers and masses are worked out, using the parameters from the currently preferred Y -states pattern. The existence of these new resonances would be a decisive footprint of the underlying diquark dynamics.