Measurements of absolute branching fractions for D mesons decays into two pseudoscalar mesons

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Abstract

Using a data sample of ${e}^{+}{e}^{\ensuremath{-}}$ collision data with an integrated luminosity of $2.93\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ taken at the center-of-mass energy $\sqrt{s}=3.773\text{ }\text{ }\mathrm{GeV}$ with the BESIII detector operating at the BEPCII storage rings, we measure the absolute branching fractions of the two-body hadronic decays ${D}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0}$, ${K}^{+}{\ensuremath{\pi}}^{0}$, ${\ensuremath{\pi}}^{+}\ensuremath{\eta}$, ${K}^{+}\ensuremath{\eta}$, ${\ensuremath{\pi}}^{+}{\ensuremath{\eta}}^{\ensuremath{'}}$, ${K}^{+}{\ensuremath{\eta}}^{\ensuremath{'}}$, ${K}_{S}^{0}{\ensuremath{\pi}}^{+}$, ${K}_{S}^{0}{K}^{+}$, and ${D}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, ${K}^{+}{K}^{\ensuremath{-}}$, ${K}^{\ensuremath{\mp}}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, ${K}_{S}^{0}{\ensuremath{\pi}}^{0}$, ${K}_{S}^{0}\ensuremath{\eta}$, ${K}_{S}^{0}{\ensuremath{\eta}}^{\ensuremath{'}}$. Our results are consistent with previous measurements within uncertainties. Among them, the branching fractions for ${D}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0}$, ${K}^{+}{\ensuremath{\pi}}^{0}$, ${\ensuremath{\pi}}^{+}\ensuremath{\eta}$, ${\ensuremath{\pi}}^{+}{\ensuremath{\eta}}^{\ensuremath{'}}$, ${K}_{S}^{0}{\ensuremath{\pi}}^{+}$, ${K}_{S}^{0}{K}^{+}$ and ${D}^{0}\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{0}$, ${K}_{S}^{0}\ensuremath{\eta}$, ${K}_{S}^{0}{\ensuremath{\eta}}^{\ensuremath{'}}$ are determined with improved precision compared to the world average values.

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