172 citations · 863 across the 42 of their papers we have counts for
26 papers · 1 filter
General Hamiltonian Approach to the -Body Finite-Volume Formalism: Extracting the Resonance Parameters from Lattice QCD
Kang Yu, Derek B. Leinweber, Anthony W. Thomas +3
We present a nonperturbative Hamiltonian framework (NPHF) to address the general -body problem. This framework rigorously connects finite-volume spectra from lattice QCD to scat…
Novel insight into centre-vortex geometry in four dimensions
Jackson A. Mickley, Chris Allton, Ryan Bignell +1
Centre-vortex surfaces are mapped out in four dimensions within the framework of SU(3) lattice gauge theory to understand the role of secondary loops that develop in three-dimensio…
Center vortices in the novel phase of staggered fermions
Jackson A. Mickley, Derek B. Leinweber, Daniel Nogradi
The geometry of center vortices is studied in the novel lattice-artefact phase that appears with staggered fermions to elucidate any insight provided by the center-vortex degrees o…
Centre vortices in thermal lattice QCD with dynamical fermions
Jackson Mickley, Chris Allton, Ryan Bignell +1
Evidence for a second finite-temperature transition in Quantum Chromodynamics (QCD) is revealed through the study of centre vortex geometry and its temperature-dependent evolution.…
The temperature dependence of fractional topological charge objects
Jackson A. Mickley, Waseem Kamleh, Derek B. Leinweber
We present a novel method for defining the topological charge contained within distinct topological objects in the nontrivial ground-state fields of SU(N) lattice gauge theory. Suc…
SU(3) centre vortex geometry at finite temperature
Jackson A. Mickley, Waseem Kamleh, Derek B. Leinweber
The importance of examining the structure of centre-vortex matter in the ground-state fields of nonabelian gauge-field theory has been demonstrated in the recent centre-vortex base…
Spectral parameters of the resonance from lattice QCD
Zhengli Wang, Derek B. Leinweber, Chuan Liu +6
We present a lattice QCD investigation of the resonance using nine Wilson-Clover ensembles with three lattice spacings and various pion masses ranging from …
Structure of center-vortex matter in SU(4) Yang-Mills theory
Jackson A. Mickley, Derek B. Leinweber, Luis E. Oxman
The structure of center vortices is studied in SU(4) Yang-Mills theory for the first time to illuminate the interplay between elementary (center charge ) and doubly charged…
Center vortices and the conformal window
J. A. Mickley, D. B. Leinweber, D. Nogradi
A novel approach for estimating the lower end of the conformal window is presented through the study of center vortex geometry and its dependence on the number of…
Physical interpretation of the 2s excitation of the nucleon
Finn M. Stokes, Waseem Kamleh, Derek B. Leinweber +1
Lattice QCD calculations of the radial excitation of the nucleon place the state at an energy of approximately 1.9 GeV, raising the possibility that it is associated with the…
Magnetic polarisability of octet baryons near the physical quark-mass point
Thomas Kabelitz, Waseem Kamleh, Derek Leinweber
The magnetic polarisabilities of octet baryons are calculated close to the physical quark-mass point using the background field method in lattice QCD. This first calculation draws…
Exploring the spectrum in lattice QCD
Liam Hockley, Waseem Kamleh, Derek Leinweber +1
We present an exploratory lattice QCD analysis of the -baryon spectrum. Using smeared three-quark operators in a correlation matrix analysis, we report masses for the ground, f…
Magnetic Polarisability of Octet Baryons via Lattice QCD
Thomas Kabelitz, Ryan Bignell, Waseem Kamleh +1
Drawing on recent advances in lattice-QCD background-field techniques, the magnetic polarisability of octet baryons is calculated from the first principles of QCD. The results are…
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…
Searching for the first radial excitation of the in lattice QCD
Liam Hockley, Waseem Kamleh, Derek Leinweber +1
We present a lattice QCD analysis of the -baryon spectrum, with the goal of finding the position of the radial excitation of the ground state. Using smeared…
Study of the pion-mass dependence of -meson properties in lattice QCD
Kang Yu, Yan Li, Jia-Jun Wu +2
We collect spectra extracted in the sector provided by various lattice QCD collaborations and study the dependence of -meson properties using Hamiltonian E…
Nucleon resonance structure in the finite volume of lattice QCD
Jia-Jun Wu, H. Kamano, T. -S. H. Lee +2
An approach for relating the nucleon resonances extracted from reaction data to lattice QCD calculations has been developed by using the finite-volume Hamiltonian method. With…
A finite-volume matrix Hamiltonian model for a Delta -> nucleon-pion system
J. M. M. Hall, A. C. -P. Hsu, D. B. Leinweber +2
A matrix Hamiltonian model is developed to address the finite-volume effects appearing in studies of baryon resonances in lattice QCD. The Hamiltonian model includes interaction te…
Baryon resonances and hadronic interactions in a finite volume
J. M. M. Hall, A. C. -P. Hsu, D. B. Leinweber +2
In a finite volume, resonances and multi-hadron states are identified by discrete energy levels. When comparing the results of lattice QCD calculations to scattering experiments, i…
Precision electromagnetic structure of decuplet baryons in the chiral regime
S. Boinepalli, D. B. Leinweber, P. J. Moran +3
The electromagnetic properties of the baryon decuplet are calculated in quenched QCD on a 20^3 x 40 lattice with a lattice spacing of 0.128 fm using the fat-link irrelevant clover…
Chiral Behaviour of the Rho Meson in Lattice QCD
D. B. Leinweber, A. W. Thomas, K. Tsushima +1
In order to guide the extrapolation of the mass of the rho meson calculated in lattice QCD with dynamical fermions, we study the contributions to its self-energy which vary most ra…
Incorporating Chiral Symmetry and Heavy Quark Theory in Extrapolations of Octet Baryon Charge Radii
E. J. Hackett-Jones, D. B. Leinweber, A. W. Thomas
We extrapolate lattice calculations of electric charge radii of the spin-1/2 baryon octet to the physical regime. The extrapolation procedure incorporates chiral perturbation theor…
Incorporating Chiral Symmetry in Extrapolations of Octet Baryon Magnetic Moments
E. J. Hackett-Jones, D. B. Leinweber, A. W. Thomas
We explore methods of extrapolating lattice calculations of hadronic observables to the physical regime, while respecting the constraints of chiral symmetry and heavy quark effecti…
Lattice QCD Calculations of the Sigma Commutator
D. B. Leinweber, A. W. Thomas, S. V. Wright
As a direct source of information on chiral symmetry breaking within QCD, the sigma commutator is of considerable importance. With recent advances in the calculation of hadron mass…