181 citations · 1.9k across the 52 of their papers we have counts for
43 papers · 1 filter
Lattice Landau gauge quark propagator and the quark-gluon vertex
Orlando Oliveira, Ayse Kızılersu, Paulo J. Silva +3
We report preliminary results of our ongoing lattice computation of the Landau gauge quark propagator and the soft gluon limit of the quark-gluon vertex with 2 flavors of dynamical…
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…
Even parity excitations of the nucleon in lattice QCD
B. G. Lasscock, J. N. Hedditch, W. Kamleh +4
We study the spectrum of the even parity excitations of the nucleon in quenched lattice QCD. We extend our earlier analysis by including an expanded basis of nucleon interpolating…
Vector meson electromagnetic form factors
B. G. Lasscock, J. Hedditch, D. B. Leinweber +1
The charge, magnetic and quadrupole form factors of vector mesons and the charge form factor of pseudo-scalar mesons are calculated in quenched lattice QCD. The charge radii and ma…
Light quark electromagnetic structure of baryons
J. N. Hedditch, B. G. Lasscock, D. B. Leinweber +3
Fascinating aspects of the light quark-mass behavior of baryon electromagnetic form factors are highlighted. Using FLIC fermions on quenched -improv…
Quark-gluon vertex in general kinematics
Ayse Kizilersu, Derek B. Leinweber, Jon-Ivar Skullerud +1
We compute the quark-gluon vertex in quenched lattice QCD, in the Landau gauge using an off-shell mean-field O(a)-improved fermion action. The Dirac-vector part of the vertex is co…
Strange Electric Form Factor of the Proton
D. B. Leinweber, S. Boinepalli, A. W. Thomas +5
By combining the constraints of charge symmetry with new chiral extrapolation techniques and recent low-mass quenched lattice QCD simulations of the individual quark contributions…
Light-Quark FLIC Fermion Simulations of the Exotic Meson
J. N. Hedditch, W. Kamleh, B. G. Lasscock +3
We investigate the mass of the exotic meson, created with hybrid interpolating fields. Access to light quark masses approaching 25 MeV is facilitated by the use of the Fat…
exotic meson at light quark masses
J. N. Hedditch, W. Kamleh, B. G. Lasscock +3
The mass of the exotic meson, created with hybrid interpolating fields, is explored at light quark masses approaching 25 MeV (). Access to such light q…
Nonperturbative renormalization of composite operators with overlap fermions
J. B. Zhang, N. Mathur, S. J. Dong +6
We compute non-perturbatively the renormalization constants of composite operators on a quenched lattice with lattice spacing = 0.20 fm for the overlap fermio…
Search for the pentaquark resonance signature in lattice QCD
B. G. Lasscock, J. Hedditch, D. B. Leinweber +5
Claims concerning the possible discovery of the Θ^+ pentaquark, with minimal quark content uudd\bar{s}, have motivated our comprehensive study into possible pentaquark states using…
Systematic uncertainties in the precise determination of the strangeness magnetic moment of the nucleon
D. B. Leinweber, S. Boinepalli, A. W. Thomas +4
Systematic uncertainties in the recent precise determination of the strangeness magnetic moment of the nucleon are identified and quantified. In summary, G_M^s = -0.046 \pm 0.019 μ…
Gluon field distribution in baryons
F. Bissey, F-G. Cao, A. Kitson +5
Methods for revealing the distribution of gluon fields within the three-quark static-baryon potential are presented. In particular, we outline methods for studying the sensitivity…
Hadron Properties with FLIC Fermions
J. M. Zanotti, D. B. Leinweber, W. Melnitchouk +2
The Fat-Link Irrelevant Clover (FLIC) fermion action provides a new form of nonperturbative O(a)-improvement in lattice fermion actions offering near continuum results at finite la…
Precise determination of the strangeness magnetic moment of the nucleon
D. B. Leinweber, S. Boinepalli, I. C. Cloet +5
By combining the constraints of charge symmetry with new chiral extrapolation techniques and recent low mass lattice QCD simulations of the individual quark contributions to the ma…
Scaling of FLIC Fermions
J. M. Zanotti, B. Lasscock, D. B. Leinweber +1
Hadron masses are calculated in quenched lattice QCD on a variety of lattices in order to probe the scaling behavior of the Fat-Link Irrelevant Clover (FLIC) fermion action, a fat-…
Hybrid Meson Spectrum from the FLIC action
J. N. Hedditch, D. B. Leinweber, A. G. Williams +1
The spectral properties of hybrid meson interpolating fields are investigated. The quantum numbers of the meson are carried by smeared-source fermion operators and highly-improved…
Electromagnetic Form Factors with FLIC fermions
J. M. Zanotti, S. Boinepalli, D. B. Leinweber +2
The Fat-Link Irrelevant Clover (FLIC) fermion action provides a new form of nonperturbative O(a) improvement and allows efficient access to the light quark-mass regime. FLIC fermio…
Nonperturbative renormalisation of composite operators with overlap quarks
J. B. Zhang, D. B. Leinweber, K. F. Liu +1
We compute non-perturbatively the renormalisation constants of composite operators on a lattice with lattice spacing = 0.093 fm for the overlap fermion action…
Electromagnetic Form Factors with FLIC Fermions
J. M. Zanotti, D. B. Leinweber, A. G. Williams +1
The Fat-Link Irrelevant Clover (FLIC) fermion action provides a new form of nonperturbative O(a) improvement and allows efficient access to the light quark-mass regime. FLIC fermio…
Dynamical FLIC Fermions
W. Kamleh, D. B. Leinweber, A. G. WIlliams
The use of APE smearing or other blocking techniques in fermion actions can provide many advantages. There are many variants of these fat link actions in lattice QCD currently, suc…
Hybrid and Exotic Mesons from FLIC Fermions
J. N. Hedditch, D. B. Leinweber, A. G. Williams +1
The spectral properties of hybrid meson interpolating fields are investigated. The quantum numbers of the meson are carried by smeared-source fermion operators and highly-improved…
Spin-3/2 Baryons in Lattice QCD
J. M. Zanotti, S. Choe, D. B. Leinweber +3
We present first results for masses of spin-3/2 baryons in lattice QCD, using a novel fat-link clover fermion action in which only the irrelevant operators are constructed using fa…
Excited Baryons from the FLIC Fermion Action
W. Melnitchouk, J. N. Hedditch, D. B. Leinweber +3
Masses of positive and negative parity excited nucleons and hyperons are calculated in quenched lattice QCD using an O(a^2) improved gluon action and a fat-link clover fermion acti…