What question did this study set out to answer?

This research aims to understand the properties and spectrum of negative parity hyperons through lattice QCD.

May 10, 2026Open Access

Negative parity hyperons from coupled channel scattering

Puntos clave

This research aims to understand the properties and spectrum of negative parity hyperons through lattice QCD.
Studied the $ ext{Λ}(1405)$ on CLS ensembles with 2+1 flavors and specific meson masses.
Considered single- and two-hadron operators both at rest and in moving frames.
Explored preliminary results for the $ ext{Ξ}(1/2^-)$ channel including multiple scattering thresholds.
Identified two poles for the $ ext{Λ}(1405)$ in previous work.
Highlighted the importance of extended operators for determining the baryon spectrum.
Provided insights into the scattering dynamics relevant for negative parity hyperons.

Resumen

We present ongoing work on the JP=1/2^- hyperons from meson–baryon scattering in lattice QCD. The (1405) is studied on CLS ensembles with 2+1 flavours and m_=285 MeV, mK=460 MeV, extending an earlier work where two poles were identified. Single- and two-hadron operators are considered at rest and in moving frames. Preliminary results are also shown for the (1/2^-) channel, including three open scattering thresholds. The importance of extended operators in the determination of the baryon spectrum is discussed as well.

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