217 research outputs found
Non-perturbative renormalization of the static quark theory in a large volume
We report on progress to renormalize non-pertubatively the static heavy quark
theory on the lattice. In particular, we present first results for
position-space renormalization scheme for heavy-light bilinears. We test our
approach on RBC's 16^3 x 32 lattice ensemble with m_pi = 420 MeV, Iwasaki gauge
action and domain wall light fermions.Comment: 7 pages, 6 figures; contribution at the 33rd International Symposium
on Lattice Field Theory, 14 -18 July 2015, Kobe, Japa
Improving chiral property of domain-wall fermions by reweighting method
The reweighting method is applied to improve the chiral property of
domain-wall fermions. One way to achieve this is to enlarge , the size of
fifth dimension, which controls the size of the induced chiral symmetry
breaking. While this is a type of reweighting method for shifting the action
parameter, it seems non-trivial since this reweighting means change of the five
dimensional lattice volume. In this report, we address issues in this direction
of reweighting and evaluate its effectiveness.Comment: 7 pages, talk presented at The XXVII International Symposium on
Lattice Field Theory, July 26-31 2009, Peking University, Beijing, Chin
Perturbative matching of continuum and lattice quasi-distributions
Matching of the quasi parton distribution functions between continuum and
lattice is addressed using lattice perturbation theory specifically with
Wilson-type fermions. The matching is done for nonlocal quark bilinear
operators with a straight Wilson line in a spatial direction. We also
investigate operator mixing in the renormalization and possible O(a) operators
for the nonlocal operators based on a symmetry argument on lattice.Comment: 8 pages, 2 figures, talk presented at the 35th International
Symposium on Lattice Field Theory, 18-24 June 2017, Granada, Spai
Full QED+QCD Low-Energy Constants through Reweighting
The effect of sea quark electromagnetic charge on meson masses is
investigated, and first results for full QED+QCD low-energy constants are
presented. The electromagnetic charge for sea quarks is incorporated in
quenched QED+full QCD lattice simulations by a reweighting method. The
reweighting factor, which connects quenched and unquenched QED, is estimated
using a stochastic method on 2+1 flavor dynamical domain-wall quark ensembles.Comment: 5 pages, 9 figures, REVTeX 4.1, v2: published versio
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