Odd-parity strange baryons Σ ( 1 2 − ) below 1.8 GeV with a Hamiltonian effective field theory
Abstract
We examine the spectrum of the Σ ( 1 2 − ) family based on the experimental K − p scattering data and lattice QCD simulations within the Hamiltonian effective field theory. Especially, two different scenarios are constructed in order to clarify whether there is one or two Σ ( 1 2 − ) resonances with masses around 1.5–1.7 GeV. The relevant lattice QCD data support our scenario with two resonance poles at 1687 − 110 i and 1714 − 14 i MeV in which the bare strange triquark core plays an important role. We also show an extra clear cusp structure around 1.4 GeV in our scattering T matrices associated with the odd-parity strange baryons.
Fields of Study & Subjects
Quantum Chromodynamics and Particle Interactions
Particle physics theoretical and experimental studies
Black Holes and Theoretical Physics
Publication details
- Journal / source
- Physical review. D/Physical review. D.
- Publisher
- American Physical Society (APS)
- Volume
- 113
- Issue
- 1
- Publication date
- 14 January 2026
- Language
- EN