Understanding the nature of <math><mi>Ω</mi><mo>(</mo><mn>2012</mn><mo>)</mo></math> in a coupled-channel approach

We perform a systematic analysis of the mass and strong decays of the Ω(2012) resonance in a coupled-channel approach of a bare three-quark state and a composite meson-baryon state. Besides the coupling of the bare state and Ξ*K&#175; channel, the effective meson-baryon interactions are also included. We find a pole with a mass of 2008 MeV by solving the Bethe-Salpeter equation. The calculated decay widths and its ratios of branching fractions RΞK&#175;ΞπK&#175; agree well with the new experimental measurement by the Belle Collaboration. Our results suggest that both three-quark core and Ξ*K&#175; channel are essential for the description of the Ω(2012) resonance. We expect that present calculations can help us to better understand the nature of Ω(2012) resonance.