Evidence for the decay <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mathvariant="normal">Ω</mml:mi><mml:mi>c</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mi mathvariant="normal">Ω</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>2012</mml:mn><mml:msup><mml:mo stretchy="false">)</mml:mo><mml:mo>−</mml:mo></mml:msup><mml:mo stretchy="false">→</mml:mo><mml…

Using a data sample of 980 fb−1 collected with the Belle detector operating at KEKB asymmetric-energy e+e− collider, we present evidence for Ω(2012)− in resonant substructure Ωc0→π+(K¯Ξ)− ((K¯Ξ)−=K−Ξ0+K¯0Ξ−) decays. The significance signal is 4.2σ after considering systematic uncertainties. ratio branching fraction Ωc0→π+Ω(2012)−→π+(K¯Ξ)− relative to that Ωc0→π+Ω− calculated be 0.220±0.059(stat.)±0.035(syst.). individual ratios fractions two isospin modes are also determined and found B(Ωc0→π+Ω(2012)−)×B(Ω(2012)−→K−Ξ0)/B(Ωc0→π+K−Ξ0)=(9.6±3.2(stat.) ±1.8(syst.))% B(Ωc0→π+Ω(2012)−)×B(Ω(2012)−→K¯0Ξ−)/B(Ωc0→π+K¯0Ξ−)=(5.5±2.8(stat.) ±0.7(syst.))%.Received 2 June 2021Accepted 27 July 2021DOI:https://doi.org/10.1103/PhysRevD.104.052005Published by American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution this work must maintain attribution author(s) published article’s title, journal citation, DOI. Funded SCOAP3.Published SocietyPhysics Subject Headings (PhySH)Research AreasBranching fractionPhysical SystemsBaryonsCharmed baryonsParticles & Fields