Measurement of branching fractions of $ {\Lambda}_c^{+} $ decays to Σ+η and Σ+η′

By analyzing e + e − collision data taken at center-of-mass energies $\sqrt{s}$ between 4.600 and 4.699 GeV with the BESIII detector at the BEPCII collider, corresponding to an integrated luminosity of 4.5 fb − 1 , we study the hadronic decays ${\Lambda}_c^{+}\to {\Sigma}^{+}\eta$ and ${\Lambda}_c^{+}\to {\Sigma}^{+}{\eta}^{\prime }$ using the single-tag method. The branching fraction ratio of ${\Lambda}_c^{+}\to {\Sigma}^{+}\eta$ relative to ${\Lambda}_c^{+}\to {\Sigma}^{+}{\pi}^0$ is determined to be 0.305 ± 0.046 stat . ± 0.007 syst . , and that of ${\Lambda}_c^{+}\to {\Sigma}^{+}{\eta}^{\prime }$ relative to ${\Lambda}_c^{+}\to {\Sigma}^{+}\omega$ is 0.336 ± 0.094 stat ± 0.037 syst . The ratio of $\frac{\mathcal{B}\left({\Lambda}_c^{+}\to {\Sigma}^{+}{\eta}^{\prime}\right)}{\mathcal{B}\left({\Lambda}_c^{+}\to {\Sigma}^{+}\eta \right)}$ is determined to be 1.73 ± 0.22 stat . ± 0.16 syst . . These results enrich our knowledge of charmed baryon decays.