Spin partners of the $$B^{(*)}\bar{B}^{(*)}$$ resonances with a different approach than the Breit–Wigner parameterization

In general, resonances are obtained by the Breit-Wigner parameterization. However, it is not entirely appropriate to use this parameterization with near-threshold such as $Z_b(10610)$ and $Z_b(10650)$, does contain threshold effect. To eliminate defect, a recently proposed alternative distribution, Sill, used predict possible heavy quark spin symmetry partners of $Z_b(10650)$. With Sill values $Z_b(10650)$ states, assuming these exotics generate molecular states consisting contact pion exchange potential, examined $S$ $D$-wave contributions. light type resonance approach, all found bound states.