We report measurements of the branching fractions of the decays Λ+c→Σ+π−π+, Λ+c→Σ0π+π0 and Λ+c→Σ+π0π0 relative to the reference channel Λ+c→pK−π+. The analysis is based on the full data sample collected at and close to Υ(4S)resonance by the Belle detector at the KEKB asymmetric-energy e+e− collider corresponding to the integrated luminosity of 711 fb−1. We measure (Λ+c→Σ+π−π+)/(Λ+c→pK−π+)=0.706 ±0.003 ±0.029, (Λ+c→Σ0π+π0)/(Λ+c→pK−π+)=0.491 ±0.005 ±0.028 and (Λ+c→Σ+π0π0)/(Λ+c→pK−π+)=0.198 ±0.006 ±0.016. The listed uncertainties are statistical and systematic, respectively.
Can also be found: https://arxiv.org/abs/1802.03421