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

Abstract

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

9 pages, 3 figures