Interpretation of the newly discovered Ω (2012)

Abstract

Very recently, Belle Collaboration reported observation of a narrow state called Ω(2012) with mass 2012.4±0.7(stat)±0.6(syst) MeV and width 6.4-2.0+2.5(stat)±1.6(syst) MeV. We calculate the mass and residue of the Ω(2012) state by employing the QCD sum rule method. Comparison of the obtained results with the experimental data allows us to interpret this state as a 1P orbital excitation of the ground state Ω baryon, i.e., with quantum numbers JP=32-.