Semi-analytical results for $e^+e^-\to J/ψ+ X_{{\rm non\,}c\bar{c}}$ up to $\mathcal{O}(α_s v^2)$ at B factories

Within the NRQCD factorization framework, we investigate the color-singlet contribution to $e^+e^- \to J/ψ+ X_{{\rm non\,}c\bar{c}}$ at B factories, computing the $\mathcal{O}(α_s)$, $\mathcal{O}(v^2)$, and $\mathcal{O}(α_s v^2)$ corrections to both the unpolarized cross section and the $J/ψ$ angula