Session PB: Recent Advances in Hadron Resonances and Nuclei using Lattice Field Theory

Resonant meson-meson scattering amplitudes from lattice QCD

The nexus of recent algorithmic and theoretical advances has significantly improved lattice QCD calculations of hadron-hadron scattering amplitudes. I will review the current state of this progress for low-lying meson resonances and emphasize calculations of resonance photo-production amplitudes such as the timelike pion form factor. This form factor is of particular interest as it may improve lattice QCD calculations of the hadronic vacuum polarization, a leading theoretical uncertainty in the Standard Model determination of the muon anomalous magnetic moment.   

Baryon phase shifts from improved operators

Lattice QCD has reached a mature stage where precision calculations of single-particle observables may be made to complement experimental efforts as well as predict new quantities not accessible by experiment. However, studies of multi-particle systems, particularly those involving baryons, are just beginning to come of age. New computational methods, particularly the development of improved operators for multi-hadron systems, allow for the extraction of multiple finite volume energy levels with an exponential reduction in computation time. Complementary theoretical tools have been developed to translate these energies into scattering phase shifts, opening a potential path to calculating the properties of baryon resonances.   

Nuclear structure and reactions using lattice effective field theory

Effective field theory (EFT) formulated on a space-time lattice provides a model-independent framework for ab initio nuclear structure and reaction calculations. The EFT interactions are rooted in quantum chromodynamics through low energy symmetry constraints. In this talk I present several recent developments in lattice EFT, in particular I present the so called adiabatic projection method that enables elastic and in-elastic reaction calculations. Bound state properties of atomic nuclei such as carbon and oxygen will also be presented.