Jun 5 – 9, 2023
Genova, Italy
Europe/Rome timezone

Low-lying baryon resonances from lattice QCD

Jun 5, 2023, 5:35 PM
DAD - Room 5L (Genova, Italy)

DAD - Room 5L

Genova, Italy

Contributed Light baryon spectroscopy Light baryon spectroscopy


Prof. Colin Morningstar (Carnegie Mellon University)


Recent results studying the masses and widths of low-lying baryon resonances in lattice QCD are presented. The $s$-wave scattering lengths with both total isospins $I=1/2$ and $I=3/2$ are inferred from the finite-volume spectrum below the inelastic threshold together with the $I=3/2$ $p$-wave containing the $\Delta(1232)$ resonance. A lattice QCD computation employing a combined basis of three-quark and meson-baryon interpolating operators with definite momentum to determine the coupled channel $\Sigma\pi-N\overline{K}$ scattering amplitude in the $\Lambda(1405)$ region is also presented. Our results support the picture of a two-pole structure suggested by theoretical approaches based on $SU(3)$ chiral symmetry and unitarity.

Primary author

Prof. Colin Morningstar (Carnegie Mellon University)


Amy Nicholson (Institute for Nuclear Theory) Andre Walker-Loud (College of William and Mary) Andrew Hanlon Barbara Mora Ben Hoerz Daniel Mohler (Helmholtz-Institut Mainz) Fernando Romero-Lopez John Bulava (University of Southern Denmark, CP3-Origins Institute) Joseph Moscoso Pavlos Vranas Sarah Skinner

Presentation materials