53 citations · 356 across the 20 of their papers we have counts for
19 papers · 1 filter
Patterns of flavour symmetry breaking in hadron matrix elements involving u, d and s quarks
J. M. Bickerton, R. Horsley, Y. Nakamura +7
By considering a flavour expansion about the SU(3)-flavour symmetric point, we investigate how flavour-blindness constrains octet baryon matrix elements after SU(3) is broken by th…
Flavour breaking effects in the pseudoscalar meson decay constants
V. G. Bornyakov, R. Horsley, Y. Nakamura +7
The SU(3) flavour symmetry breaking expansion in up, down and strange quark masses is extended from hadron masses to meson decay constants. This allows a determination of the ratio…
Improving the lattice axial vector current
R. Horsley, Y. Nakamura, H. Perlt +4
For Wilson and clover fermions traditional formulations of the axial vector current do not respect the continuum Ward identity which relates the divergence of that current to the p…
Disconnected contributions to the spin of the nucleon
A. J. Chambers, R. Horsley, Y. Nakamura +8
The spin decomposition of the proton is a long-standing topic of much interest in hadronic physics. Lattice QCD has had much success in calculating the connected contributions to t…
Wilson flow and scale setting from lattice QCD
V. G. Bornyakov, R. Horsley, R. Hudspith +8
We give a determination of the phenomenological value of the Wilson (or gradient) flow scales t0 and w0 for 2+1 flavours of dynamical quarks. The simulations are performed keeping…
A lattice determination of Sigma - Lambda mixing
R. Horsley, J. Najjar, Y. Nakamura +7
Isospin breaking effects in baryon octet (and decuplet) masses are due to a combination of up and down quark mass differences and electromagnetic effects and lead to small mass spl…
The SU(3) Beta Function from Numerical Stochastic Perturbation Theory
R. Horsley, H. Perlt, P. E. L. Rakow +2
The SU(3) beta function is computed from Wilson loops to 20th order numerical stochastic perturbation theory. An attempt is made to include massless fermions, whose contribution is…
Two-point functions of quenched lattice QCD in Numerical Stochastic Perturbation Theory
F. Di Renzo, E. -M. Ilgenfritz, H. Perlt +2
We summarize the higher-loop perturbative computation of the ghost and gluon propagators in SU(3) Lattice Gauge Theory. Our final aim is to compare with results from lattice simula…
Quark structure from the lattice Operator Product Expansion
W. Bietenholz, N. Cundy, M. Göckeler +8
We have reported elsewhere in this conference on our continuing project to determine non-perturbative Wilson coefficients on the lattice, as a step towards a completely non-perturb…
Higher-loop gluon and ghost propagators in Landau gauge from numerical stochastic perturbation theory
F. Di Renzo, E. -M. Ilgenfritz, H. Perlt +2
We present higher loop results for the gluon and ghost propagator in Landau gauge on the lattice calculated in numerical stochastic perturbation theory. We make predictions for the…
The operator product expansion on the lattice
W. Bietenholz, N. Cundy, M. Göckeler +8
We investigate the Operator Product Expansion (OPE) on the lattice by directly measuring the product <Jmu Jnu> (where J is the vector current) and comparing it with the expectation…
Non-perturbative improvement and renormalization of lattice operators
S. Capitani, M. Goeckeler, R. Horsley +7
The Alpha Collaboration has proposed an optimal value for c_SW in the Sheikholeslami-Wohlert action, chosen to remove O(a) effects. To measure hadronic matrix elements to the same…
A Preliminary Lattice Study of the Glue in the Nucleon
M. Goeckeler, R. Horsley, E. -M. Ilgenfritz +6
About half the mass of a hadron is given from gluonic contributions. In this talk we calculate the chromo-electric and chromo-magnetic components of the nucleon mass. These computa…
Physics of the Electroweak Phase Transition at M_H <= 70 GeV in a 3-dimensional SU(2)-Higgs Model
M. Gürtler, E. -M. Ilgenfritz, J. Kripfganz +2
Physical parameters of the electroweak phase transition in a 3d effective lattice SU(2)-Higgs model are presented. The phase transition temperatures, latent heats and continuum con…
Detailed Phase Transition Study at M_H <= 70 GeV in a 3-dimensional --Higgs Model
M. Gürtler, E. -M. Ilgenfritz, J. Kripfganz +2
We study the electroweak phase transition in an effective 3-dimensional theory for a Higgs mass of about 70 GeV by Monte Carlo simulations. The transition temperature and jumps of…
3--Dimensional Lattice Studies of the Electroweak Phase Transition at M_{Higgs} approx 70 GeV
M. Guertler, E. -M. Ilgenfritz, J. Kripfganz +2
We study the electroweak phase transition by lattice simulations of an effective 3--dimensional theory, for a Higgs mass of about 70 GeV. Exploiting, among others, a variant of the…
Perturbative Renormalization of Lattice Bilinear Quark Operators
M. Göckeler, R. Horsley, E. -M. Ilgenfritz +4
Our aim is to compute the lower moments of the unpolarized and polarized deep-inelastic structure functions of the nucleon on the lattice. The theoretical basis of the calculation…
--Dimensional Approach to Hot Electroweak Matter for GeV
M. Guertler, E. -M. Ilgenfritz, J. Kripfganz +2
We study the electroweak phase transition by lattice simulations of an effective 3-dimensional theory, for a Higgs mass of about GeV. Exploiting a variant of the equal weight…
3-D lattice simulation of the electroweak phase transition at small Higgs mass
E. -M. Ilgenfritz, J. Kripfganz, H. Perlt +1
We study the electroweak phase transition by lattice simulations of an effective 3-dimensional theory, for a Higgs mass of about . In the broken symmetry phase our results…