Hadron Spectroscopy with Strangeness

Session

Session 5

4 Apr 2024, 11:00

Main building, Room 253 (University of Glasgow)

11. The pole nature of the $\Lambda(1405)$: A lattice QCD calculation

Barbara Alexandra Cid Mora

04/04/2024, 11:00

This talk presents results of the first coupled-channel meson-baryon $\pi\Sigma - \bar{K}N$ computation from lattice QCD in the $\Lambda(1405)$ region. Correlation functions were calculated using a single ensemble with pion mass $m_{\pi}= 200$ MeV and kaon mass $m_{\mathrm{K}}= 487$ MeV, and included single- and multi-hadron operators. Once the finite-volume energy spectra were reliably...

14. The $\Xi(1820)$ resonance, one or two poles?

Raquel Molina Peralta

04/04/2024, 11:30

We recall that the chiral unitary approach for the interaction of pseudoscalar mesons with the baryons of the decuplet predicts two states for the $\Xi(1820)$ resonance, one with a narrow width and the other one with a large width. We contrast this fact with the recent BESIII measurement of the $K^-\Lambda$ mass distribution in the $\psi(3686)$ decay to $K^-\Lambda \bar{\Xi}^+$, which demands...