  We discuss, how to study $I = 0$ quarkonium resonances decaying into pairs of
heavy-light mesons using static potentials from lattice QCD. These static
potentials can be obtained from a set of correlation functions containing both
static and light quarks. As a proof of concept we focus on bottomonium with
relative orbital angular momentum $L = 0$ of the $\bar{b} b$ pair corresponding
to $J^{P C} = 0^{- +}$ and $J^{P C} = 1^{- -}$. We use static potentials from
an existing lattice QCD string breaking study and compute phase shifts and
$\mbox{T}$ matrix poles for the lightest heavy-light meson-meson decay channel.
We discuss our results in the context of corresponding experimental results, in
particular for $\Upsilon (10860)$ and $\Upsilon (11020)$.
