Non-perturbative calculation of Z_m using Asqtad fermions

Details Non-perturbative calculation of Z_m using Asqtad fermions Non-perturbative calculation of Z_m using Asqtad fermions

2009-10-20

arxiv.org/abs/0910.3721v1

PoS LAT2009:202,2009

Physics

High Energy Physics

High Energy Physics - Lattice

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

Scientific paper

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.

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