Observation of and evidence for in decays

住浜 水季*; 谷田 聖; Belle Collaboration*; 他184名*

Physical Review Letters, 122(7), p.072501_1 - 072501_7, 2019/02

AA2019-0535.pdf:0.37MB

https://doi.org/10.1103/PhysRevLett.122.072501

We report the first observation of the doubly-strange baryon in its decay to via decays based on a data sample collected with the Belle detector at the KEKB asymmetric-energy collider. The mass and width are measured to be 1610.4 6.0 (stat) (syst) MeV and 59.9 4.8 (stat) (syst) MeV, respectively. We obtain 4.0 evidence of the with the same data sample. These results shed light on the structure of hyperon resonances with strangeness .