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

Session

Session III

Oct 8, 2025, 1:30 PM

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

4. Momentum Flow Mechanisms and Forces on Quarks in the Nucleon

Chen Yang (University of Maryland, College Park)

10/8/25, 1:30 PM

Momentum conservation in the nucleon is examined in terms of continuous flow of the momentum current density (or in short, momentum flow), which receives contributions from both kinetic motion and interacting forces involving quarks and gluons. While quarks conduct momentum flow through their kinetic motion and the gluon scalar (anomaly) contributes via pure interactions, the gluon stress...

24. Transversity GPDs from Lattice QCD

Joshua Miller

10/8/25, 1:55 PM

Traditional approaches on studying the $x$-dependence through Large Momentum Effective Theory (LaMET) for GPDs are calculating non-local matrix elements in the symmetric frame. Recently, the novel approach of calculating GPDs in the asymmetric frame through a parameterization of the matrix elements, using Lorentz-invariant amplitudes, has been conducted for the unpolarized...

19. Updates on gluon GPDs and the hadronic structure of the photon from lattice QCD

Raza Sufian (New Mexico State University & BNL)

10/8/25, 2:15 PM

We present updates on gluon GPDs and the hadronic structure of the photon from lattice QCD. The challenges in calculating gluon GPDs will be discussed, along with preliminary results for matrix elements probing the nonperturbative structure of the resolved photon. The lattice QCD calculation of the nonperturbative structure of the photon is being performed on the RBC/UKQCD domain-wall fermion...

14. Moments of Pion GPDs from Lattice QCD at Zero and Nonzero Skewness

Fei Yao

10/8/25, 2:40 PM

We present a lattice QCD study of the moments of the pion generalized parton distributions (GPDs) at both zero and nonzero skewness. The calculations are performed at a lattice spacing of 0.04 fm with a pion mass of 300 MeV, using boosted states up to Pz = 2.43 GeV and momentum transfers reaching 2.75 GeV^2. We extract the generalized form factors (GFFs) associated with the first few moments...

29. Nucleon Form Factors with Domain Wall Fermions at Physical Pion Mass

Liam Hockley (New Mexico State University)

10/8/25, 3:05 PM

We present results for the vector and axial form factors of the isovector nucleon in $2+1$ flavour lattice QCD with Domain Wall fermions. Our pion mass is physical and the lattice spacing is $a=0.114$ fm. We extract the Dirac and Pauli form factors as well as the axial and induced pseudoscalar form factors, and study their momentum transfer dependence over the range $0.05 \lesssim Q^2 \lesssim...