Search for.S=2 nonleptonic hyperon decays O-. S0p-and O-. nK-10.1007/JHEP05(2024)141

Using (27.12 +/- 0.14) x 10(8).psi root(3686) events collected by the BESIII detector at the center-of-mass energy of v s = 3.686 GeV, we search for the first time for two nonleptonic hyperon decays that change strangeness by two units, Omega-. Sigma(0)pi- and Omega(-). nK(-). No significant signal is observed. The upper limits on their decay branching fractions are determined to be B(Omega-. Sigma(0)pi(-)) < 5.4 x 10(-4) and B(Omega(-). nK(-)) < 2.4 x 10(-4) at the 90% confidence level.