Search for B*⁰₍ₛ₎→μ⁺μ⁻ in B⁺c→π⁺μ⁺μ⁻ decays arxiv.org/abs/2409.17209 - Upper limits at the 90% confidence level are set on the branching fractions of B*⁰→μ⁺μ⁻ and B*⁰ₛ→μ⁺μ⁻ relative to that for B⁺c→J/ψπ⁺ decays at 3.8×10⁻⁵ and 5.0×10⁻⁵, respectively.