7 papers · 1 filter
Lattice QCD constraints on pion electroproduction off a nucleon
Yu Zhuge, Zhan-Wei Liu, Derek B. Leinweber +1
Very recently, a lattice QCD collaboration has explored threshold pion electroproduction near the physical pion mass and has simulated the relevant multipole amplitudes. Different…
Pion photoproduction of nucleon excited states with Hamiltonian effective field theory
Yu Zhuge, Dan Guo, Zhan-Wei Liu +2
Over the past few years, Hamiltonian effective field theory has been successfully applied to studies of nucleon and hyperon excited states. By discretizing the Hamiltonian in a fin…
Structure of the with Hamiltonian Effective Field Theory
Fang-Chao Han, Zhan-Wei Liu, Derek B. Leinweber +1
We investigate the internal structure of the by analyzing lattice QCD simulation and experimental data within Hamiltonian effective field theory, considering both $J^P…
Nucleon resonance structure to 2 GeV and the nature of the Roper
Shiryo Owa, Derek B. Leinweber, Anthony W. Thomas
The study of the spectrum of excited states of the nucleon is vital to our understanding of how QCD is realized in the baryon spectrum. Using a simultaneous analysis of the pion nu…
Pion photoproduction of nucleon excited states with Hamiltonian effective field theory
Yu Zhuge, Zhan-Wei Liu, Derek B. Leinweber +1
We refine our previous calculation of multipole amplitude for pion photoproduction process, . The treatment of final-state interactions is based upon an…
Chiral Analysis of the Nucleon Mass and Sigma Commutator
Shiryo Owa, Derek B. Leinweber, Anthony W. Thomas +1
Schemes for describing the light quark mass dependence of the nucleon mass calculated in lattice QCD are compared. The three schemes in consideration include a fully relativistic a…