paper

Stochastic method with low mode substitution for nucleon isovector matrix elements

arXiv:1509.04616 · doi:10.1103/PhysRevD.93.034503

Abstract

We introduce a stochastic sandwich method with low-mode substitution to evaluate the connected three-point functions. The isovector matrix elements of the nucleon for the axial-vector coupling $g_{A}^{3}$ , scalar couplings $g_{S}^{3}$ and the quark momentum fraction $⟨ x ⟩_{u - d}$ are calculated with overlap fermion on 2+1 flavor domain-wall configurations on a $2 4^{3} \times 64$ lattice at $m_{I ¨} = 330$ MeV with lattice spacing $a = 0.114$ fm.

15 pages, 13 figures, the version accepted by PRD