We calculate diquark correlation functions in the Landau gauge on the lattice using overlap valence quarks and 2+1-flavor domain wall fermion configurations. Quark masses are extracted from the scalar part of quark propagators in the Landau gauge. Scalar diquark quark mass difference and axial vector scalar diquark mass difference are obtained for diquarks composed of two light quarks and of a strange and a light quark. Light sea quark mass dependence of the results is examined. Two lattice spacings are used to check the discretization effects. The coarse and fine lattices are of sizes 243×64 and 323×64 with inverse spacings 1/a=1.75(4)GeV and 2.33(5)GeV, respectively.
@article{arxiv.1510.07354,
title = {Diquark mass differences from unquenched lattice QCD},
author = {Yujiang Bi and Hao Cai and Ying Chen and Ming Gong and Zhaofeng Liu and Hao-Xue Qiao and Yi-Bo Yang},
journal= {arXiv preprint arXiv:1510.07354},
year = {2016}
}