Measurements of absolute hadronic branching fractions of $\Lambda_{c}^{+}$ baryon

TL;DR

This paper reports the first precise measurements of absolute hadronic branching fractions of the mbda_c^+ baryon using electron-positron collision data, employing a double-tag technique to improve accuracy.

Contribution

It provides the first measurements of absolute branching fractions for mbda_c^+ decays with improved precision, especially for the mbda_c^+ rrow pK^-  p decay mode.

Findings

Branching fraction for mbda_c^+ rrow pK^-  p is (5.84 b1 0.27 b1 0.23)%

Measured branching fractions for twelve mbda_c^+ decay modes

Significant improvement in the precision of eleven Cabibbo-favored decay modes

Abstract

Using $567\rm{pb}^{-1}$ of $e^+e^-$ collisions recorded at $\sqrt{s}=4.599\rm{GeV}$ 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 $\Lambda_{c}^{+} \rightarrow pK^-\pi^+$ is determined to be $(5.84\pm0.27\pm0.23)\%$, 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.