We have recently performed a determination of the charm quark mass on Nf = 2+1 CLS ensembles of non-perturbatively improved Wilson fermions. I will present the preliminary results of this analysis for the renormalization-group invariant charm quark mass and the ratio m_c/m_s on these ensembles. The extrapolation to the chiral and continuum limits is performed using 5 lattice spacings ranging...
In this talk, we present a lattice determination of the coupling constant αs in Nf=3 QCD for renormalization scales μ∈(1,2) GeV. The computation has been performed on ensembles generated by the Coordinated Lattice Simulations (CLS) consortium, with tree-level Symanzik-improved gauge action and Wilson O(a)-improved fermions. Our approach is based on the study of...
The decomposition of energy and momentum in the hadron in terms of quark and gluon constituents is of fundamental importance to hadron structure, and with the ongoing development of the future Electron-Ion Collider, there is tremendous interest in imaging the transverse distributions of these constituents. This program will be strengthened by complimentary studies in Lattice QCD, where a...
We propose a method to compute a spectral sum appearing in the QCD sum rule from lattice correlators. This spectral sum corresponds to the Borel transform of the vacuum polarization, which widely appears in the phenomenological study. We discuss how to compute it from two-point correlation functions on the lattice. We measure it for three lattice spacing and confirm that the method gives...
The range of energy scales normally accessible by large-volume lattice computations is typically fairly limited (1/asimeq1−4 GeV) and potentially insufficient to reproduce high-energy perturbative results. In order to match lattice results with more phenomenologically amenable schemes, such as the MS¯ scheme, we must evolve the non-perturbative results to higher energies where...
