First measurement of the absolute branching fractions of ${\Sigma }^{+}$ nonleptonic decays and test of the $\Delta I=1/2$ rule

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Based on $(10087\pm 44)\times 10^6$ $J/\psi$ events collected by the BESIII detector at the center-of-mass energy $\sqrt{s}=3.097$ GeV, the first absolute measurement of the branc…