Radiative decays of the Ω ( 2012 ) as a hadronic molecule

We present a theoretical investigation of the radiative decay process Ω ( 2012 ) → γ Ω , where the Ω ( 2012 ) resonance with spin-parity J P = 3 2 − is treated as a dynamically generated state from K ¯ Ξ ( 1530 ) and η Ω in s -wave and K ¯ Ξ in d -wave. The radiative decay width of the Ω ( 2012 ) is calculated using a triangular loop mechanism, where the Ω ( 2012 ) couples to the K ¯ Ξ ( 1530 ) channel. Subsequently, the final-state interactions between Ξ ( 1530 ) and K ¯ transition to a photon and Ω through the exchange of a Ξ baryon. Our calculations yield a radiative decay width of 13.2 − 5.6 + 4.5 keV , with uncertainties arising from the model parameters. This result provides valuable insights into the nature of the Ω ( 2012 ) resonance and its decay dynamics. It is expected that the calculations presented here could be verified by future experiments, which would open a new door for studying the still elusive nature of Ω(2012).