We introduce a stochastic method with low-mode substitution to evaluate the connected three-point functions. The isovector matrix elements of the nucleon for the axial-vector coupling gA3, scalar couplings gS3 and the quark momentum fraction u-d are calculated with overlap fermion on 2+1 flavor domain-wall configurations on a 243×64 lattice at mπ=330 MeV with lattice spacing a=0.114 fm.
|Journal||Physical Review D|
|State||Published - Feb 11 2016|
Bibliographical noteFunding Information:
We thank the RBC and UKQCD Collaborations for providing us their DWF gauge configurations. This work is supported in part by the U.S. Department of Energy under Grants No. DE-FG05-84ER40154, and No. DE-SC0013065. A.A. acknowledges the support of NSF CAREER through Grant No. PHY-1151648. M.G. is partially supported by the National Science Foundation of China (NSFC) under the Project No. 11405178 and the Youth Innovation Promotion Association of CAS (2015013). This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation Grant No. ACI-1053575.
© 2016 American Physical Society.
ASJC Scopus subject areas
- Nuclear and High Energy Physics