Narrow Results

The mass spectrum of the ground-state tetraquarks with hidden bottom are studied within a diquark-antidiquark configuration. The considered Hamiltonian is a combination of the linear confining, Coulombic and spin-spin interaction terms. Using the perturbation theory, we calculate the heavy meson spectra and then estimate the masses of the hidden bottom tetraquaks in the non-relativistic limit. We find that the exotic state Z_b(10650) can be considered as diquarkantidiquark bound state.

We study the single charm baryons in a non-relativistic quark model. We use the hypercentral approach to simplify three-body equation of the baryonic system. In our study, the spin and isospin dependent interactions are calculated perturbatively. The mass spectra of the single charm baryons are calculated. We also predict the radiative decay width and the transition magnetic moments of the Σ_c baryons. A comparison of our results with the experimental data and the predictions of recent models is presented.