Non-perturbative improvement of the axial current for dynamical Wilson fermions

Michele Della Morte; Roland Hoffmann; Rainer Sommer

doi:10.1088/1126-6708/2005/03/029

Non-perturbative improvement of the axial current for dynamical Wilson fermions

High Energy Physics - Lattice 2008-11-26 v1

Authors: Michele Della Morte , Roland Hoffmann , Rainer Sommer

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Abstract

A non-perturbative determination of the axial current improvement coefficient cA is performed with two flavors of dynamical improved Wilson fermions and plaquette gauge action. The improvement condition is formulated with Schroedinger functional boundary conditions and enforced at constant physical volume. Large sensitivity is obtained by using two different pseudo-scalar states in the PCAC relation. We estimate the resulting correction to F_PS at beta=5.2 to be around 10%.

Keywords

lattice QCD axial current improvement Wilson fermions Schroedinger functional PCAC relation non-perturbative

Cite

@article{arxiv.hep-lat/0503003,
  title  = {Non-perturbative improvement of the axial current for dynamical Wilson fermions},
  author = {Michele Della Morte and Roland Hoffmann and Rainer Sommer},
  journal= {arXiv preprint arXiv:hep-lat/0503003},
  year   = {2008}
}

Comments

13 pages, 5 figures, JHEP style

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