Zhan-Wei Liu

Search for low-lying lattice QCD eigenstates in the Roper regime

Adrian L. Kiratidis, Waseem Kamleh, Derek B. Leinweber, Zhan-Wei Liu, Finn M. Stokes and Anthony W. Thomas

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

Study of kaon decay to two pions

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)

Study of Low-Lying Baryons with Hamiltonian Effective Field Theory

. 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

Spectroscopy with Local Multi-hadron Interpolators in Lattice QCD

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

Hamiltonian effective field theory study of the

, 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.