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By analyzing an electron-positron collision data sample corresponding to anintegrated luminosity of $2.93\,\rm fb^{-1}$ taken at the center-of-mass energyof 3.773 GeV with the BESIII detector, we obtain for the first time theabsolute branching fractions for seven $D^0$ and $D^+$ hadronic decay modes andsearch for the hadronic decay $D^0\to K^0_S K^0_S\pi^0$ with much improvedsensitivity. The results are ${\mathcal B}(D^0\to K^0_S\pi^0\pi^0\pi^0 )=(7.64\pm 0.30\pm 0.29)\times 10^{-3}$, ${\mathcal B}(D^0\toK^-\pi^+\pi^0\pi^0\pi^0 )=( 9.54\pm 0.30\pm 0.31)\times 10^{-3}$, ${\mathcalB}(D^0\to K^0_S\pi^+\pi^-\pi^0\pi^0)=(12.66\pm 0.45\pm 0.43)\times 10^{-3}$,${\mathcal B}(D^+\to K^0_S\pi^+\pi^0\pi^0 )=(29.04\pm 0.62\pm 0.87)\times10^{-3}$, ${\mathcal B}(D^+\to K^0_S\pi^+\pi^+\pi^-\pi^0)=(15.28\pm 0.57\pm0.60)\times 10^{-3}$, ${\mathcal B}(D^+\to K^0_S\pi^+\pi^0\pi^0\pi^0)=( 5.54\pm0.44\pm 0.32)\times 10^{-3}$, ${\mathcal B}(D^+\to K^-\pi^+\pi^+\pi^0\pi^0 )=(4.95\pm 0.26\pm 0.19)\times 10^{-3}$, ${\mathcal B}({D^0\to K^0_S K^0_S\pi^0})< 1.57 \times 10^{-4}$ at the 90\% confidence level. Here the firstuncertainties are statistical and the second ones systematic. The newly studieddecays greatly enrich the knowledge of the $D\to \bar K\pi\pi\pi$ and $D\to\bar K\pi\pi\pi\pi$ hadronic decays, and open a bridge to access more two-bodyhadronic $D$ decays containing scalar, vector, axial and tensor mesons in thecharm sector.

Measurements of the absolute branching fractions of hadronic $D$-meson decays involving kaons and pions