Non-perturbative calculation of Z_m using Asqtad fermions

Andrew T. Lytle

Non-perturbative calculation of Z_m using Asqtad fermions

High Energy Physics - Lattice 2010-02-23 v1

Authors: Andrew T. Lytle

Abstract

We report progress on a non-perturbative calculation of the light quark mass renormalization factor Z_m, using dynamical Asqtad fermions. This quantity is used to determine the light quark masses in the conventional MS-bar scheme. Such a non-perturbative determination of Z_m removes uncertainties due to truncation of its perturbative expansion, currently known to two loops. These calculations have been carried out using publicly available MILC lattices with spacings of approximately 0.125 and 0.09 fm.

Keywords

non-perturbative calculation light quark mass renormalization asqtad fermions ms-bar scheme mila lattices

Cite

@article{arxiv.0910.3721,
  title  = {Non-perturbative calculation of Z_m using Asqtad fermions},
  author = {Andrew T. Lytle},
  journal= {arXiv preprint arXiv:0910.3721},
  year   = {2010}
}

Comments

7 pages, 4 figures, Talk presented at the XXVII International Symposium on Lattice Field Theory, July 26-31 2009, Peking University, Beijing, China

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