Speaker
Dr
Piotr Korcyl
(University of Regensburg)
Description
We determine quark mass dependent order a improvement terms of the form $b_J$ am for non-singlet scalar, pseudoscalar, vector and axialvector currents, using correlators in coordinate space. We use a set of CLS ensembles comprising non-perturbatively improved Wilson Fermions and the tree-level Luescher-Weisz gauge action at $\beta=3.4, 3.46, 3.55$ and $\beta=3.7$, corresponding to lattice spacings a in [0.05,0.09] fm. We report the values of the $b_J$ improvement coefficients which are proportional to non-singlet quark mass combinations and also discuss the possibility of determining the $\bar{b}_J$ coefficients which are proportional to the trace of the quark mass matrix.
Primary author
Dr
Piotr Korcyl
(University of Regensburg)
Co-author
Prof.
Gunnar Bali
(University of Regensburg)
