Search for Ω ( 2012 ) → K Ξ ( 1530 ) → K π Ξ at Belle

Abstract

Using data samples of e + e − collisions collected at the Υ ( 1 S ) , Υ ( 2 S ) , and Υ ( 3 S ) resonances with the Belle detector, we search for the three-body decay of the Ω ( 2012 ) baryon to K π Ξ . This decay is predicted to dominate for models describing the Ω ( 2012 ) as a K Ξ ( 1530 ) molecule. No significant Ω ( 2012 ) signals are observed in the studied channels, and 90% credibility level upper limits on the ratios of the branching fractions relative to K Ξ decay modes are obtained.