Measurement of branching fractions of $D_s^{+}\to K_S^0{K}_S^0{\pi }^{+}{\pi }^0$ and $D_s^{+}\to K_S^0{K}^{+}{\pi }^0{\pi }^0$

Abstract

By analyzing $e^{+}{e}^{-}$ collision data corresponding to an integrated luminosity of 7.33~fb${}^{-1}$ collected with the BESIII detector at center-of-mass energies ranging from 4.128 to 4.226~GeV, we report the observations of the hadronic decays $D_s^{+}\to K_S^0{K}_S^0{\pi }^{+}{\pi }^0$ and $D_s^{+}\to K_S^0{K}^{+}{\pi }^0{\pi }^0$. Their decay branching fractions are determined to be $\mathcal{B}(D_s^{+}\to K_S^0{K}_S^0{\pi }^{+}{\pi }^0)=(4.08\pm 0.46_{\mathrm{stat}}\pm 0.45_{\mathrm{syst}})\times 10^{-3}$ and $\mathcal{B}(D_s^{+}\to K_S^0{K}^{+}{\pi }^0{\pi }^0)=(3.32\pm 0.64_{\mathrm{stat}}\pm 0.31_{\mathrm{syst}})\times 10^{-3}$, where the first uncertainties are statistical and the second are systematic.