Λc+ decays at BESIII

Using 567 pb-1 of e+e− annihilation data collected at a center-of-mass energy of s = 4.6 GeV with the BESIII detector, four analyses of Λc+ decay are reported in the QCD 17 conference. The measurements of singly Cabibbo-suppressed decays Λc+→pπ+π− and pK+K− are performed, and the relative branching fractions with respect to the Cabibbo-favored decay Λc+→pK−π+ are given, the absolute branching fractions are also obtained for these two decays. Evidence for the singly Cabibbo-suppressed decay Λc+→pη is found with 4.2σ, and the upper limit for Λc+→pπ0is reported. The absolute branching fraction B(Λc+→Σ−π+π+π0) is determined to be (2.11±0.33±0.14)%. In addition, an improved measurement of B(Λc+→Σ−π+π+) is determined as (1.81 ± 0.17 ± 0.09)%. The branching fraction of the inclusive decay Λc+→Λ+X is measured to be B(Λc+→Λ+X)=(38.2−2.2+2.8±0.6)%.