Ω baryon spectrum and their decays in a constituent quark model

2020/01/02 by Ming-Sheng Liu, Mingsheng Liu, Kai-Lei Wang +2 · 9 citations
Physics and Astronomy · #Quantum Chromodynamics and Particle Interactions #Particle physics theoretical and experimental studies #Nuclear physics research studies

paper · pdf · doi:10.1103/physrevd.101.016002

Abstract

Combining the recent developments of the observations of \mathrm\ensuremathΩ sates we calculate the \mathrm\ensuremathΩ spectrum up to the N=2 shell within a nonrelativistic constituent quark potential model. Furthermore, the strong and radiative decay properties for the \mathrm\ensuremathΩ resonances within the N=2 shell are evaluated by using the masses and wave functions obtained from the potential model. It is found that the newly observed \mathrm\ensuremathΩ(2012) resonance is most likely to be the spin-parity J^P=3/2^\ensuremath- 1P-wave state \mathrm\ensuremathΩ(1²P_3/2^\ensuremath-), it also has a large potential to be observed in the \mathrm\ensuremathΩ(1672)\ensuremathγ channel. Our calculation shows that the 1P-, 1D-, and 2S-wave \mathrm\ensuremathΩ baryons have a relatively narrow decay width of less than 50 MeV. Based on the obtained decay properties and mass spectrum, we further suggest optimum channels and mass regions to find the missing \mathrm\ensuremathΩ resonances via the strong and/or radiative decay processes.

Citations

• Excited bottom and bottom-strange mesons in the quark model

Cited by

• Unified unquenched quark model for heavy-light mesons with chiral dynamics
• Unified study of nucleon and Δ baryon spectra and their strong decays with chiral dynamics
• Singly Cabibbo-suppressed hadronic weak decays of the Ω^- hyperon
• Singly heavy tetraquarks
• Improved prediction of the mass splitting for P-wave Ω baryons
• Strong decays of the hadronic molecule Ω * (2012)
• Structure of the Ω^-(2012) with Hamiltonian Effective Field Theory
• Understanding the low-lying Ω_c structures from a coupled-channel perspective
• Hyperons in neutron stars: studies of hyperon spectroscopy and the hyperon-nucleon interaction with the K-long Facility. [europepmc]

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