Nucleon helicity and transversity parton distributions from lattice QCD

• DOI: 10.1016/j.nuclphysb.2016.07.033
• Publication Date: 2016-08-12T17:51:20Z
• Authors: Jiunn-Wei Chen; Saul D. Cohen; Xiangdong Ji; Huey-Wen Lin; Jian-Hui Zhang
• Keywords: Helicity; Isovector

We present the first lattice-QCD calculation of isovector polarized parton distribution functions (both helicity and transversity) using large-momentum effective field theory (LaMET) approach for direct Bjorken-$x$ dependence. review detailed steps procedure in unpolarized case, then generalize to transversity cases. also derive a new mass-correction formulation all three compare effects each finite-momentum correction lattice data calculated at $M_\pi\approx 310$ MeV. Finally, we discuss implications these results poorly known antiquark structure predict sea-flavor asymmetry transversely nucleon.