Measurements of absolute hadronic branching fractions of the $\Lambda_c^+$ baryon

摘要: Using 567pb−1 of e+e− collisions recorded at s√=4.599GeV with the BESIII detector, we report first measurements of absolute hadronic branching fractions of Cabibbo-favored decays of the Λ+c baryon with a double-tag technique. A global least-square fitter is utilized to improve the measured precision. Among the measurements for twelve Λ+c decay modes, the branching fraction for Λ+c→pK−π+ is determined to be (5.84±0.27±0.23)%, where the first uncertainty is statistical and the second is systematic. In addition, the measurements of the branching fractions of the other eleven Cabbibo-favored hadronic decay modes are significantly improved.