XIIth Meeting on Lattice Parton Physics from Large Momentum Effective Theory (LaMET 2025)

Session

Session I

Oct 8, 2025, 9:00 AM

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

26. The First Gluon PDF from Large Momentum Effective Theory

William Good (Michigan State University)

10/8/25, 9:00 AM

We report the first nucleon gluon parton distribution function (PDF) using Large-Momentum Effective Theory (LaMET). We compute the matching coefficients for the gluon operator with the best signal to perform hybrid-renormalization and matching to the lightcone at the one-loop level. We demonstrate that with the proper Wilson coefficients in place, the counterterms for the renormalization are...

25. Toward Continuum-Extrapolated Gluon PDFs from LaMET with Self-Renormalization

Alex NieMiera (Michigan State University)

10/8/25, 9:20 AM

We report on recent progress in calculating gluon parton distribution functions (PDFs) using Large-Momentum Effective Theory (LaMET) combined with a self-renormalization approach to address the renormalization of gluon operators. Our study uses three HISQ ensembles with lattice spacings of $a = \{0.0888, 0.1207, 0.1510\}$ fm and a valence pion mass of $M_\pi \approx$ 310 MeV, with continuum...

31. Unpolarized gluon parton distribution from lattice QCD in the continuum limit

Chen Chen (Institute of Modern Physics)

10/8/25, 9:40 AM

We report a lattice QCD calculation of the nucleon gluon parton distribution function in the continuum-limit, employing large-momentum effective theory. The calculation is carried out on the 2+1 flavour CLQCD ensembles with three lattice spacings a = {0.105, 0.0897, 0.0775} fm and pion mass of approximately 300 MeV, covering nulceon momenta up to 1.97 GeV. Distillation technique is applied to...

30. Total Gluon Helicity from Lattice

Dian-Jun Zhao (CUHK(Shenzhen))

10/8/25, 10:05 AM

We use the ensemble C24P29 provided by the CLQCD collaboration, insert the topological current using the proton external state of the momentum smear under the Coulomb gauge of the $5-\mathrm{HYP}$ smear, extract the matrix elements to calculate the gluon helicity under lattice QCD, and the calculation proves that different components of the topological currents $𝐾^\mu$ can be used to give...