Measurements of the absolute branching fractions of $D^{0(+)}\to K\bar Kππ$ decays
Based on 2.93~fb$^{-1}$ $e^+e^-$ collision data taken at center-of-mass energy of 3.773 GeV by the BESIII detector, we report the measurements of the absolute branching fractions of $D^0\to K^+K^-π^0π^0$, $D^0\to K^0_SK^0_Sπ^+π^-$, $D^0\to K^0_SK^-π^+π^0$, $D^0\to K^0_SK^+π^-π^0$, $D^+\to K^+K^-π^+π^0$, $D^+\to K^0_SK^+π^0π^0$, $D^+\to K^0_SK^-π^+π^+$, $D^+\to K^0_SK^+π^+π^-$, and $D^+\to K^0_SK^0_Sπ^+π^0$. The decays $D^0\to K^+K^-π^0π^0$, $D^0\to K^0_SK^-π^+π^0$, $D^0\to K^0_SK^+π^-π^0$, $D^+\to K^0_SK^0_Sπ^+π^0$, and $D^+\to K^0_SK^+π^0π^0$ are observed for the first time. The branching fractions of the decays $D^0\to K^0_SK^0_Sπ^+π^-$, $D^+\to K^+K^-π^+π^0$, $D^+\to K^0_SK^-π^+π^+$, and $D^+\to K^0_SK^+π^+π^-$ are measured with improved precision compared to the world-average values.