Strong decays of multi-strangeness baryon resonances in the quark model

Abstract

Decay properties of multi-strangeness Ξ and Ω baryon resonances are investigated within the constituent quark model by including relativistic corrections. The strong decay widths of various Ξ and Ω resonances are computed and tested for internal quark configurations to pin down their spin-parity (𝐽 𝑃 ) quantum numbers and internal structures. We found that the Roper-like resonances in the multi-strangeness sector have large decay widths bearing resemblances to their siblings in light and heavy baryon sectors. In addition, we obtained the decay ratio for the Ω(2012) as Γ(Ω → Ξ K𝜋)/Γ(Ω → Ξ K) = 4.5%, which is consistent with the experimental data when 𝐽 𝑃 = 3/2 − is assigned. This observation holds the possibility that the Ω(2012) could naturally be explained as a three-quark state in the quark model. The decays of other low-lying Ξ and Ω resonances are systematically analyzed, which would be useful to unveil the structure of these resonances in future experiments.

Spectroscopic study of strangeness = –3 Ω– baryon*

“…The motivation behind the current study is to exploit all resonance masses with possible spin-parity assignment. This is the extension of the previous study for non-strange [3,4] and strange baryons with S = -1, -2 [5].…”

Interpretation of the $Ω_c \to π^+ Ω(2012) \to π^+(\bar{K} Ξ)$ relative to $Ω_c \to π^+\bar{K} Ξ$ from the $Ω(2012)$ molecular perspective

“…The discovery of the Ω(2012) by the Belle collaboration using e + e − annihilation [1] prompted a fast and diverse reaction from the theoretical side, looking at it from the quark model perspective as the low-lying p-wave excited J P = 3/2 − state [2][3][4][5][6][7][8], or as a molecular state stemming from the KΞ * (1530) and ηΩ coupled channels interaction [9][10][11][12][13][14][15]. There is much related work to Ω excited states in the literature which can be seen in the introduction of the references [7,8,14] and the recent review on the strange baryon spectrum in Ref. [16].…”