27 citations · 47 across the 8 of their papers we have counts for
8 papers
Understanding the nature of the resonance
Liam Hockley, Curtis Abell, Derek Leinweber +1
We present a coupled-channel analysis of the -baryon spectrum, based in the framework of Hamiltonian Effective Field Theory (HEFT). We construct a Hamiltonian which…
Understanding the nature of baryon resonances
Derek B. Leinweber, Curtis D. Abell, Liam C. Hockley +5
This presentation opens with a brief review of lattice QCD calculations showing the radial excitation of the nucleon sits at approximately 2 GeV, well above the Roper resonanc…
Low-lying odd-parity nucleon resonances as quark-model like states
Curtis D. Abell, Derek B. Leinweber, Zhan-Wei Liu +2
Recent lattice QCD results for the low-lying odd-parity excitations of the nucleon near the and resonance positions have revealed that the lattice QCD s…
Effects of multiple single-particle basis states in scattering systems
Curtis D. Abell, Derek B. Leinweber, Anthony W. Thomas +1
Low-lying baryon resonances have been explored using Hamiltonian Effective Field Theory (HEFT), in a formalism where resonances with a three-quark component are described by both t…
Regularisation in Nonperturbative Extensions of Effective Field Theory
Curtis D. Abell, Derek B. Leinweber, Anthony W. Thomas +1
The process of renormalisation in nonperturbative Hamiltonian Effective Field Theory (HEFT) is examined in the -resonance scattering channel. As an extension of effective field…
Partial Wave Mixing in Hamiltonian Effective Field Theory
Yan Li, Jia-jun Wu, Curtis D. Abell +2
We explore partial-wave mixing in the finite volume based on HEFT, and provide the P-Matrix to show the degree of partial-wave mixing. An example of isospin-2 scattering is us…
Partial Wave Mixing in Hamiltonian Effective Field Theory
Yan Li, Jia-jun Wu, Curtis D. Abell +2
Within general partial-wave mixing, a method for reducing the high dimension of the finite-volume Hamiltonian from Hamiltonian effective field theory is proposed. This method provi…
Partial Wave Mixing in Hamiltonian Effective Field Theory
Yan Li, Jia-Jun Wu, Curtis D. Abell +2
The spectrum of excited states observed in the finite volume of lattice QCD is governed by the discrete symmetries of the cubic group. This finite group permits the mixing of orbit…