Revisiting the Ω (2012) as a hadronic molecule and its strong decays

Recently, the Belle collaboration measured the ratios of the branching fractions of the newly observed Ω (2012) excited state. They did not observe significant signals for the Ω (2012) → K¯ Ξ ^∗(1530) → K¯ πΞ decay, and reported an upper limit for the ratio of the three body decay to the two body decay mode of Ω (2012) → K¯ Ξ. In this work, we revisit the newly observed Ω (2012) from the molecular perspective where this resonance appears to be a dynamically generated state with spin-parity 3 / 2 ^- from the coupled channels interactions of the K¯ Ξ ^∗(1530) and ηΩ in s-wave and K¯ Ξ in d-wave. With the model parameters for the d-wave interaction, we show that the ratio of these decay fractions reported recently by the Belle collaboration can be easily accommodated.