170 citations · 3.6k across the 120 of their papers we have counts for
122 papers
Lattice results for the longitudinal spin structure and color forces on quarks in a nucleon
S. Bürger, T. Wurm, M. Löffler +5
Using lattice QCD, we calculate the twist-2 contribution to the third Mellin moment of the spin structure functions and in the nucleon. In addition we evaluate th…
Nonperturbative Renormalization in Lattice QCD with three Flavors of Clover Fermions: Using Periodic and Open Boundary Conditions
G. S. Bali, S. Bürger, S. Collins +6
We present the nonperturbative computation of renormalization factors in the RI'-(S)MOM schemes for the QCD gauge field ensembles generated by the CLS (coordinated lattice simulati…
Pion distribution amplitude from Euclidean correlation functions
Gunnar S. Bali, Vladimir M. Braun, Benjamin Gläßle +8
Following the proposal in [1], we study the feasibility to calculate the pion distribution amplitude (DA) from suitably chosen Euclidean correlation functions at large momentum. In…
The -meson light-cone distribution amplitudes from lattice QCD
Vladimir M. Braun, Peter C. Bruns, Sara Collins +9
We present the results of a lattice study of the normalization constants and second moments of the light-cone distribution amplitudes of longitudinally and transversely polarized $…
Nucleon generalized form factors from lattice QCD with nearly physical quark masses
Gunnar Bali, Sara Collins, Meinulf Göckeler +3
We determine generalized form factors of the nucleon from lattice simulations with mass-degenerate non-perturbatively improved Wilson-Sheikholeslami-Wohlert fermions down…
and resonances on the lattice at nearly physical quark masses and
Gunnar S. Bali, Sara Collins, Antonio Cox +4
Working with a pion mass MeV, we study and scattering using two flavours of non-perturbatively improved Wilson fermions at a lattice spacing $a\approx 0.…
Light-cone distribution amplitudes of the baryon octet
Gunnar S. Bali, Vladimir M. Braun, Meinulf Göckeler +8
We present results of the first ab initio lattice QCD calculation of the normalization constants and first moments of the leading twist distribution amplitudes of the full baryon o…
Pion Distribution Amplitude from Lattice QCD
V. M. Braun, S. Collins, M. Göckeler +4
We have calculated the second moment of the pion light-cone distribution amplitude using two flavors of dynamical (clover) fermions on lattices of different volumes, lattice spacin…
Second Moment of the Pion Light-cone Distribution Amplitude from Lattice QCD
V. M. Braun, S. Collins, M. Göckeler +4
We present the results of a lattice study of the second moment of the light-cone pion distribution amplitude using two flavors of dynamical (clover) fermions on lattices of differe…
Using NSPT for the Removal of Hypercubic Lattice Artifacts
Jakob Simeth, Andre Sternbeck, Meinulf Gockeler +2
The treatment of hypercubic lattice artifacts is essential for the calculation of non-perturbative renormalization constants of RI-MOM schemes. It has been shown that for the RI'-M…
The moment of the nucleon from lattice QCD down to nearly physical quark masses
Gunnar S. Bali, Sara Collins, Benjamin Gläßle +7
We present an update of our analysis [1] which includes additional ensembles at different quark masses, lattice spacings and volumes, all with high statistics. We use mass-…
Light-cone Distribution Amplitudes of the Nucleon and Negative Parity Nucleon Resonances from Lattice QCD
V. M. Braun, S. Collins, B. Gläßle +6
We present the results of a lattice study of light-cone distribution amplitudes (DAs) of the nucleon and negative parity nucleon resonances using two flavors of dynamical (clover)…
Nucleon generalized form factors and sigma term from lattice QCD near the physical quark mass
G. S. Bali, S. Collins, B. Gläßle +8
We present new N_f=2 data for the nucleon generalized form factors, varying volume, lattice spacing and pion mass, down to 150 MeV. We also give an update of our direct calculation…
Moments of structure functions for near the physical point
G. S. Bali, S. Collins, B. Gläßle +7
We report on our on-going study of the lower moments of iso-vector polarised and unpolarised structure functions, and , respectively, and the iso-vect…
Nucleon structure from stochastic estimators
Gunnar S. Bali, Sara Collins, Benjamin Gläßle +6
Using stochastic estimators for connected meson and baryon three-point functions has successfully been tried in the past years. Compared to the standard sequential source method we…
Perturbatively improving renormalization constants
M. Constantinou, M. Costa, M. Gockeler +6
Renormalization factors relate the observables obtained on the lattice to their measured counterparts in the continuum in a suitable renormalization scheme. They have to be compute…
<x>_{u-d} from lattice QCD at nearly physical quark masses
Gunnar S. Bali, Sara Collins, Mridupawan Deka +7
We determine the second Mellin moment of the isovector quark parton distribution function <x>_{u-d} from lattice QCD with N_f=2 sea quark flavours, employing the non-perturbatively…
Nucleon mass and sigma term from lattice QCD with two light fermion flavors
G. S. Bali, P. C. Bruns, S. Collins +16
We analyze Nf=2 nucleon mass data with respect to their dependence on the pion mass down to mpi = 157 MeV and compare it with predictions from covariant baryon chiral perturbation…
First moments of the nucleon generalized parton distributions from lattice QCD
A. Sternbeck, M. Göckeler, Ph. Hägler +8
We report on our lattice calculations of the nucleon's generalized parton distributions (GPDs), concentrating on their first moments for the case of N_f=2. Due to recent progress o…
An Update on Distribution Amplitudes of the Nucleon and its Parity Partner
R. W. Schiel, G. S. Bali, V. M. Braun +12
The calculation of baryon wave functions at small inter-quark separations is an ongoing effort within the QCDSF collaboration. In this update on normalization constants and distrib…
Strangeness Contribution to the Proton Spin from Lattice QCD
Gunnar S. Bali, Sara Collins, Meinulf Gockeler +8
We compute the strangeness and light-quark contributions Delta s, Delta u and Delta d to the proton spin in nf=2 lattice QCD at a pion mass of about 285 MeV and at a lattice spacin…
A lattice study of the strangeness content of the nucleon
G. S. Bali, S. Collins, M. Gockeler +9
We determine the quark contributions to the nucleon spin Delta s, Delta u and Delta d as well as their contributions to the nucleon mass, the sigma-terms. This is done by computing…
The strange and light quark contributions to the nucleon mass from Lattice QCD
Gunnar S. Bali, Sara Collins, Meinulf Gockeler +9
We determine the strangeness and light quark fractions of the nucleon mass by computing the quark line connected and disconnected contributions to the matrix elements m_q <N|qbar q…
Dirac and Pauli form factors from lattice QCD
S. Collins, M. Göckeler, Ph. Hägler +11
We present a comprehensive analysis of the electromagnetic form factors of the nucleon from a lattice simulation with two flavors of dynamical O(a)-improved Wilson fermions. A key…