Odd-parity strange baryons <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi mathvariant="normal">Σ</mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:msup> <mml:mfrac> <mml:mn>1</mml:mn> <mml:mn>2</mml:mn> </mml:mfrac> <mml:mo>−</mml:mo> </mml:msup> <mml:mo stretchy="false">)</mml:mo> </mml:math> below 1.8 GeV with a Hamiltonian effective field theory
Zhong-Lin Ma, Zhan-Wei Liu, Jiong-Jiong Liu
原始摘要（英文原文）· Original 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.