Speaker
Sarah Skinner
(Carnegie Mellon University)
Description
Studies of the $\Delta$ baryon resonance and the $K_0^\ast(700)$ and $a_0(980)$ meson resonances using $N_f=2+1$ lattice QCD for pion masses near 200 MeV are presented. The role of tetraquark operators in the mesonic systems is detailed. The $s$-wave scattering lengths for both the $I=1/2$ $N \pi$ and $I=3/2$ $N \pi$ channels and properties of the $\Delta$ resonance are identified from the finite-volume energy levels of the lattice simulation.
| Topical area | Hadronic and Nuclear Spectrum and Interactions |
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Primary author
Sarah Skinner
(Carnegie Mellon University)
Co-authors
Dr
Andrew Hanlon
(Physics Department, Brookhaven National Laboratory)
Amy Nicholson
(UNC, Chapel Hill)
Andre Walker-Loud
(LBNL)
Dr
Ben Hörz
(Nuclear Science Division, Lawrence Berkeley National Laboratory)
Colin Morningstar
(Carnegie Mellon University)
Daniel Darvish
(Carnegie Mellon University)
Fernando Romero-López
(MIT)
Dr
John Bulava
(Deutsches Elektronen-Synchrotron DESY)
Dr
Pavlos Vranas
(Nuclear Science Division, Lawrence Berkeley National Laboratory)