Work

Odd-parity strange baryons Σ ( 1 2 − ) below 1.8 GeV with a Hamiltonian effective field theory

Year: 2026

Type: article

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.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/m32c-wk63

Authors: Zhong-Lin Ma, Zhan-Wei Liu, Jiong-Jiong Liu

Institutions: Institute of Modern Physics, Lanzhou University, State Grid Corporation of China (China)

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center)

Awards: G1513945615, G6029794207, G7735526052, G8805052026