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

Abstract

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$$ .

Authors:

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

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+ Show Author Affiliations

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)

Publication Date:

2018-08-03

Research Org.:

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Org.:

USDOE Office of Science (SC)

OSTI Identifier:

1544236

Grant/Contract Number:  

11775078; 2017M620492

Resource Type:

Accepted Manuscript

Journal Name:

Physical Review D

Additional Journal Information:

Journal Volume: 98; Journal Issue: 3; Journal ID: ISSN 2470-0010

Publisher:

American Physical Society (APS)

Country of Publication:

United States

Language:

English

Subject:

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS