Total Gluon Helicity from Lattice without Effective Theory Matching
High Energy Physics - Phenomenology
2024-07-02 v3 High Energy Physics - Lattice
Nuclear Experiment
Nuclear Theory
Abstract
We propose two approaches for extracting the total gluon helicity contribution to proton spin from lattice QCD, one from local operator matrix elements in a fixed gauge accessible on lattice with feasible renormalization, and the other from gauge-invariant nonlocal gluon correlators. Neither of these approaches requires a matching procedure when converted to the MS scheme. Our proposal resolves a long-standing inconsistency in the literature regarding lattice calculations of the total gluon helicity, and has the potential to greatly facilitate these calculations.
Keywords
Cite
@article{arxiv.2404.00693,
title = {Total Gluon Helicity from Lattice without Effective Theory Matching},
author = {Zhuoyi Pang and Fei Yao and Jian-Hui Zhang},
journal= {arXiv preprint arXiv:2404.00693},
year = {2024}
}
Comments
14 pages