Quantum Numbers of Recently Discovered Ω_{c}^{0} Baryons from Lattice QCD

Area of Science:

• Quantum Chromodynamics (QCD)
• Particle Physics
• Nuclear Physics

Background:

• The Omega_c^0 baryon is a charm baryon whose excited states are actively being researched.
• Recent observations by the LHCb Collaboration have identified five new Omega_c^0 baryon states, requiring theoretical interpretation.

Purpose of the Study:

• To determine the quantum numbers, specifically spin-parity (J^P), of the newly discovered Omega_c^0 baryon states.
• To provide theoretical predictions based on lattice QCD calculations to aid in the experimental characterization of these states.

Main Methods:

• Utilized lattice quantum chromodynamics (LQCD) simulations with dynamical quark fields.
• Calculated the ground and excited state spectra of Omega_c^0 baryons up to spin 7/2.
• Compared LQCD results with experimental observations from the LHCb Collaboration.

Main Results:

• Predicted quantum numbers for five recently observed Omega_c^0 baryons.
• Identified Omega_c(3000)^0 and Omega_c(3050)^0 as likely J^P=1/2^- states.
• Assigned Omega_c(3066)^0 and Omega_c(3090)^0 to J^P=3/2^- and Omega_c(3119)^0 to a possible J^P=5/2^-.

Conclusions:

• Lattice QCD calculations strongly support the assignment of specific spin-parity quantum numbers to the observed Omega_c^0 states.
• The findings provide crucial theoretical insight into the nature of these exotic baryons, facilitating further experimental investigation.
• This work advances the understanding of baryon spectroscopy within the framework of quantum chromodynamics.