The Strangeness and Charmness of Nucleon from Overlap Fermions

QCD Collaboration; M. Gong; A. Li; A. Alexandru; T. Draper; K. F. Liu

paper

The Strangeness and Charmness of Nucleon from Overlap Fermions

arXiv:1204.0685

Abstract

The calculation of the strangeness and charmness of the nucleon is presented with overlap fermion action on 2+1 flavor domain wall fermion configurations. We adopt stochastic grid sources and the low mode substitution technique to improve the signals of nucleon correlation functions and the loops. The calculation is done on a $2 4^{3} \times 64$ lattice with $m_{l} = 0.005$ , $m_{h} = 0.04$ , and $a^{- 1} = 1.73 GeV$ . We find $f_{T_{s}} = 0.048 (15)$ and $f_{T_{c}} = 0.029 (43)$ .

Talk presented at the XXIX International Symposium on Lattice Field Theory, Squaw Valley, Lake Tahoe, California, USA, July 10-16, 2011. 7 pages, 5 figures