The odd-parity strange baryons $Σ\,(\frac{1}{2}^-)$ below 1.8 GeV with Hamiltonian effective field theory
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| Format: | Preprint |
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2025
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| _version_ | 1866917242977910784 |
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| author | Ma, Zhong-Lin Liu, Zhan-Wei Liu, Jiong-Jiong |
| author_facet | Ma, Zhong-Lin Liu, Zhan-Wei Liu, Jiong-Jiong |
| contents | We examine the spectrum of the $Σ\,(\frac{1}{2}^-)$ 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 $Σ\,(\frac{1}{2}^-)$ resonances with masses around 1.5$\sim$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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2509_17510 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The odd-parity strange baryons $Σ\,(\frac{1}{2}^-)$ below 1.8 GeV with Hamiltonian effective field theory Ma, Zhong-Lin Liu, Zhan-Wei Liu, Jiong-Jiong High Energy Physics - Phenomenology High Energy Physics - Lattice We examine the spectrum of the $Σ\,(\frac{1}{2}^-)$ 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 $Σ\,(\frac{1}{2}^-)$ resonances with masses around 1.5$\sim$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. |
| title | The odd-parity strange baryons $Σ\,(\frac{1}{2}^-)$ below 1.8 GeV with Hamiltonian effective field theory |
| topic | High Energy Physics - Phenomenology High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2509.17510 |