2024 Meeting on Lattice Parton Physics from Large Momentum Effective Theory (LaMET2024)

Session

Presentations

12 Aug 2024, 13:15

University of Maryland, College Park

29. Lattice QCD Predictions for Meson Electromagnetic Form Factors at High Momenta: Testing Factorization in Exclusive Processes

Peter Petreczky

12/08/2024, 13:15

We report the first lattice QCD computation of pion and kaon electromagnetic form factors, $F_M(Q^2)$,
at large momentum transfer up to 10 and 28 GeV2, respectively. The calculations are performed using HISQ
action on fine lattices with physical quark massesi and Breit frame [1].
We test the QCD collinear factorization framework utilizing our high- $Q^2$ form factors at...

17. Three-dimensional Imaging of Pion using Lattice QCD: Generalized Parton Distributions

Qi Shi

12/08/2024, 13:45

We report a lattice calculation of $x$-dependent valence pion generalized parton distributions (GPDs) at zero skewness with multiple values of the momentum transfer $-t$. The calculations are based on an $N_f=2+1$ gauge ensemble of highly improved staggered quarks with Wilson-Clover valence fermion. The lattice spacing is 0.04 fm, and the pion valence mass is tuned to be 300 MeV. We determine...

20. Towards Unpolarized GPDs from Pseudo-Distributions

Herve Dutrieux (William and Mary)

12/08/2024, 14:10

I will present the recent lattice calculation of the unpolarized generalized form factors by the Hadtruc collaboration. We use the pseudo-distribution formalism with an extended kinematic domain in $(\xi, t)$. I will discuss the limitations and improvement perspectives of this study.

23. Proton Transversity GPDs from Lattice QCD

Joshua Miller

12/08/2024, 14:35

The $x$-dependence of GPDs is still relatively unknown, but recent developments from lattice QCD with a new approach (PRD 106 (2022) 11, 114512) produce promising results from matrix elements calculated from any kinematic frame. Traditionally, GPDs are calculated in the symmetric frame, where the momentum transfer is evenly split between the initial and final states. In this talk, we present...