A New Look at the $Y$ Tetraquarks and $\Omega_c$ Baryons in the Diquark Model

Understand

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 system such as $P$-wave charmonia and the newly discovered $\Omega_c$ 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 $L=1$ diquarkonia, whose $J^{PC}$ quantum numbers and masses are worked out, using the parameters from the currently preferred $Y$-states pattern.