Measurements of absolute hadronic branching fractions of ${\Lambda }_c^{+}$ baryon

Abstract

Using $567{\mathrm{pb}}^{-1}$ of $e^{+}{e}^{-}$ collisions recorded at $\sqrt{s}=4.599\mathrm{GeV}$ with the BESIII detector, we report first measurements of absolute hadronic branching fractions of Cabibbo-favored decays of the ${\Lambda }_c^{+}$ baryon with a double-tag technique. A global least-square fitter is utilized to improve the measured precision. Among the measurements for twelve ${\Lambda }_c^{+}$ decay modes, the branching fraction for ${\Lambda }_c^{+}\to p{K}^{-}{\pi }^{+}$ is determined to be $(5.84\pm 0.27\pm 0.23)\%$, 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.

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