Speaker
Jinzi Wu
(The George Washington University)
Description
The Roper resonance does not fit many quark model predictions or lattice QCD calculations. One reason could be the strong three-body dynamics for this channel. The analysis of the Roper with lattice QCD requires a hadronic coupled-channel amplitude in the two- and three-body channels.
As a first step, we develop an amplitude that consistently and unitarily includes the $\pi N$ and $\pi\pi N$ channels, which will allow us to map finite-volume energies from lattice QCD to the infinite-volume amplitude using the finite-volume unitarity (FVU) approach. Available partial-wave data in the Roper and the isobar sub-channels are described, allowing for the most precise pole determination of the Roper resonance to date.
Authors
Jinzi Wu
(The George Washington University)
Maxim Mai
(University of Bern)
Michael Doering
(The George Washington University)