Speaker
Description
In 2011, Belle discovered two $Z_b^+$ hadrons with quark content $\bar{b}b\bar{d}u$. Lattice study of hadrons with this quark content is challenging because they can decay to two $B$-mesons and also to a bottomonium and a light meson, leading to a large number of decay channels. We present a lattice study of the $\bar{b}b\bar{d}u$ system with the static bottom quarks. Only the channel that couples to $\bar bb + \pi$ was explored on the lattice before $-$ it features an attractive potential for the $B\bar{B}^*$ and a bound state below the threshold. Our lattice study incorporates channels with other quantum numbers that have not been investigated before. Eigen-energies of the system are extracted as a function of separation between $\bar{b}$ and $b$ in all channels.
