Observation of D0(+)→KS0π0(+)η′ and improved measurement of D0→K−π+η′

Le résumé fourni par la source

By analyzing an ${e}^{+}{e}^{\ensuremath{-}}$ data sample corresponding to an integrated luminosity of $2.93\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ taken at a center-of-mass energy of 3.773 GeV with the BESIII detector, we measure the branching fractions of the Cabibbo-favored hadronic decays ${D}^{0}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\eta}}^{\ensuremath{'}}$, ${D}^{0}\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{0}{\ensuremath{\eta}}^{\ensuremath{'}}$, and ${D}^{+}\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\eta}}^{\ensuremath{'}}$, which are determined to be $(6.43\ifmmode\pm\else\textpm\fi{}0.1{5}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}0.3{1}_{\mathrm{syst}})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$, $(2.52\ifmmode\pm\else\textpm\fi{}0.2{2}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}0.1{5}_{\mathrm{syst}})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$, and $(1.90\ifmmode\pm\else\textpm\fi{}0.1{7}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}0.1{3}_{\mathrm{syst}})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$, respectively. The precision of the branching fraction of ${D}^{0}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\eta}}^{\ensuremath{'}}$ is significantly improved, and the processes ${D}^{0}\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{0}{\ensuremath{\eta}}^{\ensuremath{'}}$ and ${D}^{+}\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\eta}}^{\ensuremath{'}}$ are observed for the first time.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.