Jia-Jun Wu

Structure of the

The pole structure of the

\mathbf{\Lambda(1405)}

\mathrm{\ensuremath{\Lambda}}(1405)

from Hamiltonian effective field theory

is examined by fitting the couplings of an underlying Hamiltonian effective field theory to cross sections of

N* Spectroscopy from Lattice QCD: The Roper Explained

{K}^{\ensuremath{-}}p

Nucleon resonance structure in the finite volume of lattice QCD

scattering in the infinite-volume limit. Finite-volume spectra are then obtained from the theory, and compared to lattice QCD results for the mass of the

Structure of the Nucleon and its Excitations

\mathrm{\ensuremath{\Lambda}}(1405)

Efficient operators for studying higher partial waves

. Momentum-dependent, nonseparable potentials motivated by the well-known Weinberg-Tomozawa terms are used, with SU(3) flavor symmetry broken in the couplings and masses. In addition, we examine the effect on the behavior of the spectra from the inclusion of a bare triquarklike isospin-zero basis state. It is found that the cross sections are consistent with the experimental data with two complex poles for the

Study of Low-Lying Baryons with Hamiltonian Effective Field Theory

\mathrm{\ensuremath{\Lambda}}(1405)

Accessing high momentum nucleons in lattice QCD

, regardless of whether a bare-baryon basis state is introduced or not. However, it is apparent that the bare baryon is important for describing the results of lattice QCD at high pion masses.

Finite-Volume Hamiltonian Method for ππ Scattering in Lattice QCD

Derek Leinweber, Waseem Kamleh, Adrian Kiratidis, Zhan-Wei Liu, Selim Mahbub, Dale Roberts, Finn Stokes, Anthony W. Thomas and Jiajun Wu