Speaker
Prof.
Colin Morningstar
(Carnegie Mellon University)
Description
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)
Co-authors
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
Peer reviewing
Paper
Paper files:
