Search
Now showing items 31-39 of 39
O(a 2) corrections to the one-loop propagator and bilinears of clover fermions with Symanzik improved gluons
(2009)
We calculate corrections to the fermion propagator and to the Green's functions of all fermion bilinear operators of the form , to one-loop in perturbation theory. We employ the Wilson/clover action for fermions and the ...
Precision study of excited state effects in nucleon matrix elements
(2011)
We present a dedicated analysis of the influence of excited states on the calculation of nucleon matrix elements. This calculation is performed at a fixed value of the lattice spacing, volume and pion mass that are typical ...
Direct Evaluation of the Quark Content of Nucleons from Lattice QCD at the Physical Point
(2016)
We evaluate the light, strange, and charm scalar content of the nucleon using one lattice QCD ensemble generated with two degenerate light quarks with mass fixed to their physical value. We use improved techniques to ...
PLQCD library for lattice QCD on multi-core machines
(Proceedings of Science (PoS), 2013)
PLQCD is a stand-alone software library developed under PRACE for lattice QCD. It provides an implementation of the Dirac operator for Wilson type fermions and few efficient linear solvers. The library is optimized for ...
Investigating efficient methods for computing four-quark correlation functions
(2017)
We discuss and compare the efficiency of various methods, combinations of point-to-all propagators, stochastic timeslice-to-all propagators, the one-end trick and sequential propagators, to compute two-point correlation ...
The 4D SU(3) gauge theory with an imaginary θ term
(2011)
We study the scaling behavior of the 4D SU(3) lattice gauge theory in the presence of a θ term, by Monte Carlo simulations computing the topological properties at imaginary θ. The numerical results provide a good evidence ...
Scalar mesons and tetraquarks by means of lattice QCD
(2012)
We study the light scalar mesons a0(980) and κ using Nf = 2+1+1 flavor lattice QCD. In order to probe the internal structure of these scalar mesons, and in particular to identify, whether a sizeable tetraquark component ...
Scalar mesons and tetraquarks from twisted mass lattice QCD
(2013)
We study light scalar mesons with particular focus on the a 0(980) using lattice QCD with 2+1+1 dynamical quark flavors. To investigate the structure of these scalar mesons and to identify, whether a sizeable tetraquark ...
Investigation of light and heavy tetraquark candidates using lattice QCD
(2014)
We review the status of an ongoing long-term lattice investigation of the spectrum and structure of tetraquark candidates. We focus on the light scalar meson a0(980). First steps regarding the study of a possibly existing ...