The odd-parity strange baryons Σ ((1)/(2)^-) below 1.8 GeV with Hamiltonian effective field theory

2025/09/22 by Ma, Zhong-Lin, Liu, Zhan-Wei, Liu, Jiong-Jiong
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2509.17510

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.

Citations

• How to unravel the nature of the Σ^*(1430) (1/2^-) state from correlation functions
• Low-lying odd-parity nucleon resonances as quark-model like states
• J^P=1/2^- Pentaquarks in Jaffe and Wilczek's Diquark Model

Related

• S=-1,-2 baryon-baryon interactions in chiral effective field theory
• Analysis of the [\bf 56,4⁺] Baryon Masses in the 1/N_c Expansion
• Effective Strange Quark/Antiquark Masses from the Chiral Soliton Models for Baryons
• Low-lying odd-parity nucleon resonances as quark-model like states
• Strangeness S=-3 and -4 baryon-baryon interactions in chiral effective field theory