Possible interpretation of the newly observed $\mathrm{\Omega }\left(2012\right)$ state

Journal Article · 03 August 2018 · Physical Review D

DOI: https://doi.org/10.1103/PhysRevD.98.034004 · OSTI ID:1544236

Xiao, Li-Ye ^[1]; Zhong, Xian-Hui ^[2]

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1. Peking Univ., Beijing (China). School of Physics, State Key Lab. of Nuclear Physics. Center of High Energy Physics
2. Hunan Normal Univ,, Changsha (China). Dept. of Physics, Key Lab. of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications (SICQEA)

Inspired by the newly observed $Ω (2012)$ state at Belle II, we investigate the two-body strong decays of $$Ω$$ baryons up to $N = 2$ shell within the chiral quark model. Our results indicate that (i) the newly observed $Ω (2012)$ state could be assigned to the spin-parity $J^P = 3 / 2^-$ state |$$70,^{2}10, 1, 1, \frac{3^-}{2}$$$$\rangle$$ and the experimental data can be reasonably described. However, the spin-parity $J^P = 1 / 2^-$ state |$$70,^{2}10, 1, 1, \frac{1^-}{2}$$$$\rangle$$ and spin-parity $J^P = 3 / 2^+$ state |$$56, ^{4}10, 2, 0, \frac{3^+}{2}$$$$\rangle$$ cannot be completely excluded. (ii) The $$D$$-wave states in the $N = 2$ 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 $$\Xi$$$$K$ and/or $$\Xi(1530)K$$ channels in future experiments. The $Ω(2250)$ resonance listed in PDG may be a good candidate for the $J^P$ = $5/2^+$ $1D$ wave state |$56$$,$$^{4}10$$, $2, 2$, $5/2^+$ $$\rangle$$ .

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
• Sponsoring Organization: USDOE Office of Science (SC)
• OSTI ID: 1544236
• Journal Information: Physical Review D, Journal Name: Physical Review D Journal Issue: 3 Vol. 98; ISSN PRVDAQ; ISSN 2470-0010
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English