Light Cone 2026: Applications at EIC era (LC 2026)

Updates on the Gluon PDF from Large Momentum Effective Theory

Jun 26, 2026, 2:00 PM

30m

CFNS, Peter Paul Seminar Room, C 120 Physics Building (Stony Brook University/Online)

McCartor Awardees McCartor Awardees

Speaker

William Good (Michigan State University)

Description

We report updates on tackling the systematics in the nucleon gluon parton distribution function (PDF) from Large-Momentum Effective Theory (LaMET). We compute use the self renormalization technique to compute gluon PDFs from data measured on HISQ ensembles generated by the MILC collaboration with $N_f = 2 + 1 + 1$, $a = 0.15, 0.12, 0.09$ fm, with valence pion masses around 310 and 690 MeV. We find slight dependence on the lattice spacing, which is fully controlled by a continuum extrapolation. We study pion mass and gauge link smearing effects, finding minimal dependence in both cases. Overall, we find a gluon PDF which prefers fewer gluons at large-x, which could provide strong constraints on global fits of the gluon PDF.
We also report on preliminary results towards computing the gluon PDF from Coulomb gauge fixed correlators.