$Λ_{c}^{+}$ decays at BESIII

BESIII has made great progress in taking data which is the largest data samples near the $Λ_{c}^{+}\barΛ_{c}^{-}$ threshold. We have measured the branching fraction of $Λ_{c}^{+}\to nπ^{+}$ to be $(6.6\pm 1.2_{\mathrm{stat.}}\pm 0.4_{\mathrm{syst.}})\times 10^{-4}$ with the statistical significance of 7.3 $σ$ firstly using $3.9\mathrm{fb}^{-1}$ $e^{+}e^{-}$ collision collected with BESIII detector at six center-of-mass energies between 4.612 and 4.699 GeV. With the result of the branching fraction of $Λ_{c}^{+}\to pπ^{0}$ from Belle, the ratio of the branching fractions between $Λ_{c}^{+}\to nπ^{+}$ and $Λ_{c}^{+}\to pπ^{0}$ is measured to be larger than 7.2 at 90% confidence level. The branching fractions of $Λ_{c}^{+}\to Λπ^{+}$ and $Λ_{c}^{+}\to Σ^{0} π^{+}$ are measured to be $(1.31\pm 0.08_{\mathrm{stat.}}\pm 0.05_{\mathrm{syst.}})\times 10^{-2}$ and $(1.22\pm 0.08_{\mathrm{stat.}}\pm 0.07_{\mathrm{syst.}})\times 10^{-2}$, respectively, which are consistent with previous BESIII results. More results of $Λ_{c}^{+}$ decays will be published with better precision this year using $6.4\mathrm{fb}^{-1}$ $e^{+}e^{-}$ collision data samples between 4.600 and 4.946 GeV.

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