Nucleon Helicity and Transversity Parton Distributions from Lattice QCD

Jiunn-Wei Chen , Saul D. Cohen , Xiangdong Ji , Huey-Wen Lin , Jian-Hui Zhang

Authors on Pith no claims yet

classification ✦ hep-ph hep-lat

keywords helicitytransversitycasesfirstlatticenucleonpartonpolarized

read the original abstract

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

This paper has not been read by Pith yet.

discussion (0)

Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

Quasi Parton Distribution Functions in Covariant Quark Models
hep-ph 2026-05 unverdicted novelty 7.0

In gauge-free quark models, quasi-PDFs converge to PDFs with proven sum rules, and the Covariant Parton Model supplies closed-form small-x results that match a Wandzura-Wilczek approximation for the quark energy-momen...