Measurements of absolute branching fractions of ${D}^{0}\to {K}_{L}^{0}\varphi $, ${K}_{L}^{0}\eta $, ${K}_{L}^{0}\omega $, and ${K}_{L}^{0}{\eta }^{\prime }$

We report the first measurements of the absolute branching fractions of ${D}^{0}\to {K}_{L}^{0}\varphi $, ${D}^{0}\to {K}_{L}^{0}\eta $, ${D}^{0}\to {K}_{L}^{0}\omega $, and ${D}^{0}\to {K}_{L}^{0}{\eta }^{\prime }$, by analyzing $2.93\text{}\text{}{\mathrm{fb}}^{-1}$ of ${e}^{+}{e}^{-}$ collision data taken at a center-of-mass energy of 3.773 GeV with the BESIII detector. Taking the world averages of the branching fractions of ${D}^{0}\to {K}_{S}^{0}\varphi $, ${D}^{0}\to {K}_{S}^{0}\eta $, ${D}^{0}\to {K}_{S}^{0}\omega $, and ${D}^{0}\to {K}_{S}^{0}{\eta }^{\prime }$, the ${K}_{S}^{0}-{K}_{L}^{0}$ asymmetries $R\left({D}^{0},X\right)$ in these decay modes are obtained. The $CP$ asymmetries in these decays are also determined. No significant $CP$ violation is observed.