Measurements of ${K}_{S}^{0}$ - ${K}_{L}^{0}$ asymmetries in the decays ${\Lambda }_{c}^{+}\to p{K}_{L,S}^{0}$ , $p{K}_{L,S}^{0}{\pi }^{+}{\pi }^{-}$ and $p{K}_{L,S}^{0}{\pi }^{0}$

Using e + e − annihilation data sets corresponding to an integrated luminosity of 4.5 fb −1, collected with the BESIII detector at center-of-mass energies between 4.600 and 4.699 GeV, we report the first measurements of the absolute branching fractions $B\left({\Lambda }_{c}^{+}\to p{K}_{L}^{0}\right)$ = (1.67 ± 0.06 ± 0.04)%, $B\left({\Lambda }_{c}^{+}\to p{K}_{L}^{0}{\pi }^{+}{\pi }^{-}\right)$ = (1.69 ± 0.10 ± 0.05)%, and $B\left({\Lambda }_{c}^{+}\to p{K}_{L}^{0}{\pi }^{0}\right)$ = (2.02 ± 0.13 ± 0.05)%, where the first uncertainties are statistical and the second systematic. Combining with the known branching fractions of ${\Lambda }_{c}^{+}\to p{K}_{S}^{0}$ , ${\Lambda }_{c}^{+}\to p{K}_{S}^{0}{\pi }^{+}{\pi }^{-}$ , and ${\Lambda }_{c}^{+}\to p{K}_{S}^{0}{\pi }^{0}$ , we present the first measurements of the ${K}_{S}^{0}$ - ${K}_{L}^{0}$ asymmetries $R\left({\Lambda }_{c}^{+},{K}_{S,L}^{0}X\right)=\frac{B\left({\Lambda }_{c}^{+}\to {K}_{S}^{0}X\right)-B\left({\Lambda }_{c}^{+}\to {K}_{L}^{0}X\right)}{B\left({\Lambda }_{c}^{+}\to {K}_{S}^{0}X\right)+B\left({\Lambda }_{c}^{+}\to {K}_{L}^{0}X\right)}$ in charmed baryon decays: $R\left({\Lambda }_{c}^{+},p{K}_{S,L}^{0}\right)=-0.025±0.031$ , $R\left({\Lambda }_{c}^{+},p{K}_{S,L}^{0}{\pi }^{+}{\pi }^{-}\right)=-0.027±0.048$ and $R\left({\Lambda }_{c}^{+},p{K}_{S,L}^{0}{\pi }^{0}\right)=-0.015±0.046$ . No significant asymmetries with statistical significance are observed.