Speaker
Prof.
Michael Döring
(The George Washington University)
Description
Unitarity dictates the on-shell condition of multi-particle systems. It is therefore the tool to determine the leading finite-volume effects needed for the extrapolation of lattice QCD results. Together with unitary extensions of Chiral Perturbation Theory, one may attempt to extrapolate to the physical point. After a short summary on recent extrapolations in the two-body resonance sector (sigma, rho), a new, relativistic method for the extrapolation of three-particle systems is presented, based on a three-body unitary isobar expansion. Existing data from the NPLQCD collaboration on a system of three interacting pions is analyzed and, for the first time, excited levels for a physical three-body system are predicted.
Author
Prof.
Michael Döring
(The George Washington University)
Co-author
Prof.
Maxim Mai
(The George Washington University)
