${\Lambda }_{c}^{+}$ decays at BESIII

Based on 567 pb⁻¹ data taken at the center-of-mass energies $\sqrt{s}=4.599\,{\rm{GeV}}$ with BESIII detector, we report the following results: (a) improved measurements of the relative branching fractions (BFs) for the singly Cabbibo-suppressed decays of ${\Lambda }_{c}^{+}\to p{K}^{+}{K}^{-}$ and ${\Lambda }_{c}^{+}\to p{\pi }^{+}{\pi }^{-}$, (b) the first evidence for the ${\Lambda }_{c}^{+}\to p\eta$ is found with 4.2σ, (c) the most precise upper limit for ${\Lambda }_{c}^{+}\to p{\pi }^{0}$, the absolute BFs of the two neutron decay modes ${\Lambda }_{c}^{+}\to \displaystyle {\Sigma }^{-}{\pi }^{+}{\pi }^{+}$ and ${\Lambda }_{c}^{+}\to \displaystyle {\Sigma }^{-}{\pi }^{+}{\pi }^{+}{\pi }^{0}$ are measured with better precision, (d) the measurement of the absolute BFs for the two W-exchange only decays ${\Lambda }_{c}^{+}\to {\Xi }^{0}{K}^{+}$ and ${\Lambda }_{c}^{+}\to \Xi {(1530)}^{0}{K}^{+}$, (e) the significant improved measurement of the absolute BF of the inclusive decay ${\Lambda }_{c}^{+}\to \Lambda +X$, (f) the cross section of ${e}^{+}{e}^{-}\to {\Lambda }_{c}^{+}{\bar{\Lambda }}_{c}^{-}$ process is measured with unprecedented precision using the data at $\sqrt{s}=4.575$, 4.580, 4.590 and 4.599 GeV.