English

A possible interpretation of the newly observed $\Omega(2012)$ state

High Energy Physics - Phenomenology 2018-08-08 v1

Abstract

Inspired by the newly observed Ω(2012)\Omega(2012) state at Belle II, we investigate the two-body strong decays of Ω\Omega baryons up to N=2N=2 shell within the chiral quark model. Our results indicate that: (i) the newly observed Ω(2012)\Omega(2012) state could be assigned to the spin-parity JP=3/2J^P=3/2^- state 70,210,1,1,32|70,^210,1,1,\frac{3}{2}^-\rangle and the experimental data can be reasonably described. However, the spin-parity JP=1/2J^P=1/2^- state 70,210,1,1,12|70,^210,1,1,\frac{1}{2}^-\rangle and spin-parity JP=3/2+J^P=3/2^+ state 56,410,2,0,32+|56,^410,2,0,\frac{3}{2}^+\rangle can't be completely excluded. (ii) The DD-wave states in the N=2N=2 shell are most likely to be narrow states with a width of dozens of MeV and have a good potential to be observed in the ΞK\Xi K and/or Ξ(1530)K\Xi(1530)K channels in future experiments. The Ω(2250)\Omega(2250) resonance listed in PDG may be a good candidate of the JP=5/2+J^P=5/2^+ 1D1D wave state 56,410,2,2,5/2+|56,^410,2,2,5/2^+\rangle.

Keywords

Cite

@article{arxiv.1805.11285,
  title  = {A possible interpretation of the newly observed $\Omega(2012)$ state},
  author = {Li-Ye Xiao and Xian-Hui Zhong},
  journal= {arXiv preprint arXiv:1805.11285},
  year   = {2018}
}

Comments

6 pages, 2 figures